JP3486839B2 - Impact resistant structural material - Google Patents
Impact resistant structural materialInfo
- Publication number
- JP3486839B2 JP3486839B2 JP2000176532A JP2000176532A JP3486839B2 JP 3486839 B2 JP3486839 B2 JP 3486839B2 JP 2000176532 A JP2000176532 A JP 2000176532A JP 2000176532 A JP2000176532 A JP 2000176532A JP 3486839 B2 JP3486839 B2 JP 3486839B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- composite material
- resistant structural
- girder
- impact resistant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
Landscapes
- Vibration Dampers (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、航空機、自動車、
鉄道をはじめ、一般産業用の衝撃吸収能力に優れた耐衝
撃構造材に関する。TECHNICAL FIELD The present invention relates to an aircraft, an automobile,
The present invention relates to a shock resistant structural material excellent in shock absorbing ability for general industries such as railways.
【０００２】[0002]
【従来の技術】例えば回転翼航空機であるヘリコプタ
は、その特性上、有視界、低高度での都市部や山間部運
用が多く、常に障害物との接触等による事故の危険をは
らんでおり、万が一墜落しても搭乗者生存性確保のため
の耐衝撃性が強く要求されている。2. Description of the Related Art For example, a helicopter, which is a rotary wing aircraft, is often used in urban areas and mountainous areas at low altitudes due to its characteristics, and is always in danger of accidents due to contact with obstacles. Even in the unlikely event of a crash, there is a strong demand for impact resistance to ensure the survival of passengers.
【０００３】現在実用化されているヘリコプタにおいて
は、座席、降着装置等は不慮の接地衝撃を吸収する機構
の備わったものが実用化されているが、床構造に関して
は実運用中に遭遇しうる飛行、地上荷重等で設計される
のが一般的であり、不慮の接地衝撃吸収については考慮
されていないのが現状である。Among the helicopters currently in practical use, seats, landing gears, etc. having a mechanism for absorbing an accidental grounding impact have been put into practical use, but the floor structure may be encountered during actual operation. It is generally designed for flight, ground load, etc., and the fact that accidental ground impact absorption is not taken into consideration is the current situation.
【０００４】航空機床構造の衝撃吸収については、従来
より研究が行われており、数々の衝撃吸収構造材が文献
（例えば、革新航空機技術開発に関する研究調査成果報
告書Ｎｏ．０１０１、１９９０年３月、社団法人 日本
航空宇宙工業会革新航空機技術開発センター）に報告さ
れている。その中で、図１７に示すようにＩ型箱形断面
の複合材長尺桁１のウエブ２の桁長手方向に一定間隔を
存して複合材チューブ３を縦向きに埋め込み成形した耐
衝撃構造材４が、最も良いエネルギ吸収能力を示してい
る。Impact absorption of aircraft floor structures has been researched in the past, and various impact absorption structural materials have been reported in literature (for example, Research and Survey Results Report No. 0101 on the development of innovative aircraft technology, March 1990). , Japan Aerospace Industry Innovation Aircraft Technology Development Center). Among them, as shown in FIG. 17, a shock-resistant structure in which a composite material tube 3 is vertically embedded by molding at a constant interval in the longitudinal direction of the web 2 of a composite material long girder 1 having an I-shaped box cross section. Material 4 shows the best energy absorption capacity.
【０００５】然し乍ら上記耐衝撃構造材４は、衝撃エネ
ルギ吸収能力としては優れているが、文献（例えば、Ｆ
ＲＰ円筒のエネルギー吸収機構に関する研究、１９９５
年、第２４回ＦＲＰシンポジウム講演論文集）に報告さ
れている図１８に示すような複合材チューブ特有の衝撃
エネルギ吸収上極めて好ましい安定な順次破壊モードに
移行するまでの間に、図１９に示すような過大な初期反
力立ち上がり１３を生じ、これをヘリコプタ床構造等に
適用した場合、乗員に加速度傷害をもたらすような加速
度を生ずることから、この実用化にあたっては改良の余
地が残されている。However, although the impact resistant structural material 4 is excellent in impact energy absorption capacity, it is not described in the literature (for example, F
Study on energy absorption mechanism of RP cylinder, 1995
19 of the 24th FRP symposium), which is shown in FIG. 19 until the transition to the stable sequential failure mode, which is extremely preferable for absorbing shock energy peculiar to the composite material tube as shown in FIG. Such an excessive initial reaction force rise 13 occurs, and when this is applied to a helicopter floor structure or the like, acceleration that causes acceleration injury to an occupant is generated, and therefore there is room for improvement in practical application. .
【０００６】[0006]
【発明が解決しようとする課題】そこで本発明は、複合
材チューブ特有の衝撃エネルギ吸収上極めて好ましい安
定な順次破壊モードに移行するまでの間に生ずる過大な
初期反力立ち上がりを抑制し、衝撃エネルギ吸収能力の
優れた、しかも普段は通常運用荷重に対しても主要構造
部材として適用可能な、工作容易でかつ軽量な耐衝撃構
造材を提供しようとするものである。SUMMARY OF THE INVENTION Therefore, the present invention suppresses the excessive initial reaction force rise that occurs during the transition to the stable sequential fracture mode, which is extremely preferable for absorbing the impact energy peculiar to the composite material tube, and the impact energy is suppressed. It is an object of the present invention to provide a shock-resistant structural material which has an excellent absorption capacity and which can be applied as a main structural member under normal operating load and is easy to work and lightweight.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
の本発明の耐衝撃構造材の１つは、箱形断面の長尺桁の
ウエブ部に、桁長手方向に間隔を存して、または、他の
長尺桁との交差中央部に、または、その両方に、複合材
チューブを桁長手方向及びウエブ板厚方向と垂直をなす
方向にチューブ穴軸方向が向くように配置した耐衝撃構
造材であって、前記複合材チューブの端部周壁に複数の
開口を、複合材チューブの中央部に向って複合材チュー
ブ断面に占める開口面積が次第に小さくなるように配設
したことを特徴とするものである。One of the impact-resistant structural materials of the present invention for solving the above-mentioned problems is to provide a web portion of an elongated girder having a box-shaped cross section with a space in the longitudinal direction of the girder. Alternatively, the impact resistance is obtained by arranging the composite material tube at the center of the cross with other long girders, or both, so that the tube hole axis direction is oriented in the direction perpendicular to the girder longitudinal direction and the web plate thickness direction. A structural material, characterized in that a plurality of openings are provided in an end peripheral wall of the composite material tube so that an opening area occupying a cross section of the composite material tube gradually decreases toward a central portion of the composite material tube. To do.
【０００８】上記本発明の耐衝撃構造材において、複合
材チューブは、円形、楕円形、三角形、四角形、多角形
断面、さらにはそれら大小のものを複数本束ねたものの
いずれかであることが好ましい。In the impact resistant structural material of the present invention, the composite material tube is preferably a circular, elliptical, triangular, quadrangular, polygonal cross section, or a bundle of a plurality of those large and small. .
【０００９】上記本発明の耐衝撃構造材において、箱形
断面の長尺桁のウエブは、薄板材で低密度コア材ととも
に複合材チューブを挾んで形成されていることが好まし
い。In the impact resistant structural material of the present invention, it is preferable that the web of the long girder having a box-shaped cross section is formed of a thin plate material with a low density core material and a composite material tube.
【００１０】上記本発明の耐衝撃構造材において、複合
材チューブの端部周壁に設けられた開口の形状は、円
形、半円形、長円形、半長円形、スリット、三角形、四
角形、または多角形などの各種形状がある。In the above impact resistant structural material of the present invention, the shape of the opening provided in the end peripheral wall of the composite material tube is circular, semicircular, oval, semi-oval, slit, triangular, quadrangular, or polygonal. There are various shapes such as.
【００１１】上記本発明の耐衝撃構造材において、複合
材チューブの端部周壁に設けられた開口は、断面角形の
複合材チューブの場合、端部の角部に配設されているこ
ともある。In the above impact resistant structural material of the present invention, the opening provided in the peripheral wall of the end portion of the composite material tube may be provided at the corner portion of the end portion in the case of the composite material tube having a rectangular cross section. .
【００１２】本発明の耐衝撃構造材の他の１つは、箱形
断面の長尺桁のウエブ部に、桁長手方向に間隔を存し
て、または、他の長尺桁との交差中央部に、または、そ
の両方に、複合材チューブを桁長手方向及びウエブ板厚
方向と垂直をなす方向にチューブ穴軸方向が向くように
配置した耐衝撃構造材であって、前記複合材チューブが
肉厚方向で複数の層に構成され、その複合材チューブの
端部層間に母材に比して強度の低いフィルム状層材を挾
んで積層していることを特徴とするものである。Another one of the impact resistant structural materials of the present invention is a web portion of a long girder having a box-shaped cross section, with a space in the longitudinal direction of the girder, or a center of intersection with another long girder. Part, or both, a shock-resistant structural material, wherein the composite material tube is arranged so that the tube hole axial direction is oriented in a direction perpendicular to the girder longitudinal direction and the web plate thickness direction, wherein the composite material tube is It is characterized in that it is composed of a plurality of layers in the thickness direction, and a film-like layer material having lower strength than the base material is sandwiched between the end layers of the composite material tube.
【００１３】本発明の耐衝撃構造材のさらに他の１つ
は、箱形断面の長尺桁のウエブ部に、桁長手方向に間隔
を存して、または、他の長尺桁との交差中央部に、また
は、その両方に、複合材チューブを桁長手方向及びウエ
ブ板厚方向と垂直をなす方向にチューブ穴軸方向が向く
ように配置した耐衝撃構造材であって、前記複合材チュ
ーブが肉厚方向で複数の層に構成され、その複合材チュ
ーブの端部層間にフィルム状層材を挾んで成形した後、
前記フィルム状層材を除去して端部層間に隙間を形成し
たことを特徴とするものである。Still another one of the impact resistant structural materials of the present invention is a web portion of a long girder having a box-shaped cross section, which is spaced apart in the longitudinal direction of the girder or intersects with another long girder. A composite material tube, wherein the composite material tube is arranged in the central portion or both of them so that the tube hole axial direction is oriented in a direction perpendicular to the girder longitudinal direction and the web plate thickness direction. Is composed of a plurality of layers in the thickness direction, after sandwiching the film-like layer material between the end layers of the composite material tube,
The film-like layer material is removed to form a gap between the end layers.
【００１４】上記他の２つの耐衝撃構造材において、箱
形断面の長尺桁のウエブは、薄板材で低密度コア材とと
もに複合材チューブを挾んで形成されていることが好ま
しい。In the other two impact resistant structural materials, it is preferable that the long girder web having a box-shaped cross section is formed of a thin plate material with a low density core material sandwiching a composite material tube.
【００１５】上記の耐衝撃構造材において、複合材チュ
ーブの層間に挾んで積層されるフィルム状層材は、Ｘ線
を使った非破壊検査を容易にするための造影剤を含んで
いることをが好ましい。In the above impact resistant structural material, the film-like layer material sandwiched between the layers of the composite material tube contains a contrast agent for facilitating nondestructive inspection using X-rays. Is preferred.
【００１６】[0016]
【発明の実施の形態】本発明の耐衝撃構造材の実施形態
を図によって説明する。図１において、１は箱形断面の
長尺桁で、ウエブ２の桁長手方向に間隔を存して、複合
材チューブ３を桁長手方向及びウエブ２の板厚方向と直
角をなす方向にチューブ穴軸方向が向くように配置して
耐衝撃構造材４を構成している。また、図２に示すよう
に箱形断面の長尺桁１のウエブ２同士の交差点中央部
に、複合材チューブ３を桁長手方向及びウエブ２の板厚
方向と直角をなす方向にチューブ穴軸方向が向くように
配置して耐衝撃構造材４′を構成している。さらに図示
しないが、箱形断面の長尺桁１のウエブ２の桁長手方向
に間隔を存して及びウエブ２同士の交差点中央部に複合
材チューブ３を前記と同様に配置して耐衝撃構造材を構
成している。前記の箱形断面の長尺桁１は、薄板材５，
５で低密度コア材６と共に複合材チューブ３を挾んでウ
エブ２を形成している。また、前記の複合材チューブ３
は、図３のａ〜ｆに示すように端部周壁に円形，楕円
形，三角形，四角形，スリット，半円形，或いは多角形
など各種形状の複数の開口７を、複合材チューブ３の中
央部に向って複合材チューブ３の断面に占めるその開口
７の面積が次第に小さくなるように配設している。この
複合材チューブ３は図４のａ〜ｊに示すように断面が円
形，楕円形，三角形，四角形，多角形，さらにそれら大
小のものを複数束ねたものなどのものがある。そして、
断面角形の複合材チューブ３の場合、角部の端部には例
えば図５に示すように角落とし８が設けられている。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an impact resistant structural material of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 is a long girder having a box-shaped cross section, and the composite material tube 3 is arranged in a direction perpendicular to the girder longitudinal direction and the plate thickness direction of the web 2 at intervals in the girder longitudinal direction of the web 2. The impact-resistant structural member 4 is formed by arranging so that the hole axis direction is oriented. Further, as shown in FIG. 2, at the center of the intersection of the webs 2 of the long girder 1 having the box-shaped cross section, the composite material tube 3 is attached to the tube hole shaft in the direction perpendicular to the girder longitudinal direction and the plate thickness direction of the web 2. The shock-resistant structural material 4'is arranged so that the directions thereof face each other. Further, although not shown, the composite material tube 3 is arranged in the longitudinal direction of the web 2 of the long girder 1 having a box-shaped cross section in the longitudinal direction of the web 2 and the composite material tube 3 is arranged at the center of the intersection of the webs 2 in the same manner as described above to provide an impact resistant structure. It constitutes the material. The long girder 1 having the box-shaped cross section is made of the thin plate material 5,
5, the composite material tube 3 is sandwiched together with the low density core material 6 to form the web 2. In addition, the composite material tube 3 described above
3 has a plurality of openings 7 of various shapes such as a circle, an ellipse, a triangle, a quadrangle, a slit, a semicircle, or a polygon in the peripheral wall of the end, as shown in FIGS. The composite material tube 3 is arranged so that the area of the opening 7 occupying the cross section of the composite material tube 3 gradually decreases. The composite material tube 3 has a circular cross section, an elliptical shape, a triangular shape, a quadrangular shape, a polygonal shape as shown in FIGS. And
In the case of the composite material tube 3 having a rectangular cross-section, a corner drop 8 is provided at the end of the corner as shown in FIG. 5, for example.
【００１７】図６に示す耐衝撃構造材９及び図７に示す
耐衝撃構造材９′における複合材チューブ３は、図１，
図２と同様に配置され、断面が図４のａ〜ｊに示すよう
に円形，楕円形，三角形，四角形，多角形，さらにはそ
れら大小のものを複数本束ねたものもあり、それら複合
材チューブ３は図８のａに示すように肉厚方向が複数の
層で構成され、その端部層間には母材に比して強度の低
いフィルム状層材１０を挾んで積層した部分１１を設け
ている。また、この端部層間のフィルム状層材１０を除
去して、図９のａに示すように端部層間に隙間１２を形
成したものもある。The composite material tube 3 in the impact resistant structural material 9 shown in FIG. 6 and the impact resistant structural material 9'shown in FIG.
As shown in FIGS. 4A to 4J, the cross sections are arranged in the same manner as in FIG. 2, and are circular, elliptical, triangular, quadrangular, polygonal, and a plurality of large and small ones are bundled. As shown in FIG. 8A, the tube 3 is composed of a plurality of layers in the thickness direction, and a portion 11 in which a film-like layer material 10 having a lower strength than the base material is sandwiched and laminated between the end layers. It is provided. Further, there is also one in which the film-like layer material 10 between the end layers is removed to form a gap 12 between the end layers as shown in FIG. 9A.
【００１８】前述のように図１，図２の耐衝撃構造材
４，４′は、箱形断面の長尺桁１のウエブ２の桁長手方
向に図１に示すように間隔を存して、または、図２に示
すようにウエブ２同士の交差点中央部に、もしくは、図
示しないがその両方に、桁長手方向及びウエブ２の板厚
方向と直角をなす方向にチューブ穴軸方向が向くように
配置した複合材チューブ３の端部周壁に、図３のａ〜ｆ
に示すように各種形状の複数の開口７を中央部に向って
複合材チューブ３の断面に占める開口７の面積が次第に
小さくなるように配設しており、また、断面角形の複合
材チューブ３の場合、角部の端部に図５に示すように角
落とし８が設けられているので、複合材チューブ特有の
衝撃エネルギ吸収上極めて好ましい安定な順次破壊モー
ドに移行するまでの間に生ずる過大な初期反力立ち上が
りが、複合材チューブ３の端部周壁の開口７や断面角形
の複合材チューブ３の角部の端部に設けられた角落とし
８による部分圧潰により抑制され、図１０に示すヘリコ
プタＨの床構造Ｄ等に適用した場合、優れたエネルギ吸
収特性を備えることができる。無論上記耐衝撃構造材
４，４′は、普段は通常運用荷重に対して荷重伝達を行
う軽量な主要構造部材として使用可能である。As described above, the impact resistant structural members 4 and 4'in FIGS. 1 and 2 are spaced from each other in the longitudinal direction of the web 2 of the long girder 1 having a box-shaped cross section as shown in FIG. Or, as shown in FIG. 2, the tube hole axial direction is oriented at the center of the intersection between the webs 2 or at both sides (not shown) in a direction perpendicular to the longitudinal direction of the girder and the thickness direction of the web 2. A to f of FIG. 3 on the end peripheral wall of the composite material tube 3 arranged in FIG.
As shown in FIG. 7, the plurality of openings 7 of various shapes are arranged so that the area of the openings 7 occupying the cross section of the composite material tube 3 gradually decreases toward the central portion. In the case of, the corner drop 8 is provided at the end of the corner as shown in FIG. Such initial reaction force rise is suppressed by partial crushing by the openings 7 in the peripheral wall of the end portion of the composite material tube 3 and the corner drop 8 provided at the end portion of the corner portion of the composite material tube 3 having a square cross section, as shown in FIG. When applied to the floor structure D of the helicopter H or the like, excellent energy absorption characteristics can be provided. Of course, the impact resistant structural members 4 and 4'can be usually used as a lightweight main structural member for transmitting a load to a normal operating load.
【００１９】また、前述のように図６，図７の耐衝撃構
造材９，９′は、箱形断面の長尺桁１のウエブ２の桁長
手方向に図６に示すように間隔を存して、または図７に
示すようにウエブ２同士の交差点中央部に、もしくは、
図示しないがその両方に、桁長手方向及びウエブ２の板
厚方向と直角をなす方向にチューブ穴軸方向が向くよう
に配置した複合材チューブ３が、図８のａに示すように
肉厚方向が複数の層で構成され、その端部層間には母材
に比して強度の低いフィルム状層材１０を挾んで積層し
た部分１１を設け、または、この端部層間のフィルム状
層材１０を除去して図９のａに示すように端部層間に隙
間１２を形成しているので、複合材チューブ特有の衝撃
エネルギ吸収上極めて好ましい安定な順次破壊モードに
移行するまでの間に生ずる過大な初期反力立ち上がり
が、図８のｂ，図９のｂに示す端部の部分圧潰により抑
制され、図１０に示すヘリコプタＨの床構造Ｄに適用し
た場合、優れたエネルギ吸収特性を備えることができ
る。また、図８のフィルム状層材１０は造影剤を含んで
いることにより、製造検査時にフィルム状層材１０が端
部層間に挿入されていることの確認がＸ線を使った非破
壊検査により容易に判定できる。無論上記耐衝撃構造材
９，９′は、普段は通常運用荷重に対して荷重伝達を行
う軽量な主要構造部材として使用可能である。Further, as described above, the impact resistant structural members 9 and 9'of FIGS. 6 and 7 have a space as shown in FIG. 6 in the longitudinal direction of the web 2 of the long girder 1 having a box-shaped cross section. Or at the center of the intersection of the webs 2 as shown in FIG. 7, or
Although not shown, a composite material tube 3 is arranged on both sides so that the tube hole axis direction is oriented in a direction perpendicular to the girder longitudinal direction and the plate thickness direction of the web 2, as shown in FIG. Is composed of a plurality of layers, and a portion 11 in which a film-like layer material 10 having a lower strength than the base material is sandwiched is provided between the end layers, or the film-like layer material 10 between the end layers is provided. Is removed to form the gap 12 between the end layers as shown in FIG. 9A, an excessive amount that occurs during the transition to the stable sequential fracture mode, which is extremely preferable for absorbing the impact energy peculiar to the composite material tube, is formed. The initial reaction force rise is suppressed by the partial crushing of the end portions shown in FIGS. 8B and 9B, and when applied to the floor structure D of the helicopter H shown in FIG. 10, it has excellent energy absorption characteristics. You can Further, since the film-like layer material 10 of FIG. 8 contains the contrast agent, it is confirmed by non-destructive inspection using X-ray that the film-like layer material 10 is inserted between the end layers during the manufacturing inspection. It can be easily determined. Of course, the impact resistant structural members 9 and 9'can be usually used as a lightweight main structural member for transmitting a load to a normal operating load.
【００２０】本発明の耐衝撃構造材の有効性を明らかに
するために、従来例の図１７に示す耐衝撃構造材との静
的荷重−変位特性試験及び解析結果比較を図１１，図１
２に示す。この比較の際の本発明の実施例の耐衝撃構造
材は、図１３，図１４の寸法の箱形断面の長尺桁１にあ
って、矩形断面の複合材チューブ３が図１５に示すよう
に端部附近の角部に配設され、一辺が１０ｍｍの斜めに
角を切り取った角落とし８を有するものと、図１６に示
すように端部層間に厚さ０．２ｍｍ、長さ５ｍｍ，７ｍ
ｍの２枚のフィルム状層材１０を挾んで積層した部分１
１を設けたものであり、従来例の耐衝撃構造材は、矩形
断面の複合材チューブ３の端部角部に角落とし９や端部
層間にフィルム状層材１０が無いものである。In order to clarify the effectiveness of the impact resistant structural material of the present invention, a static load-displacement characteristic test and comparison of analysis results with the impact resistant structural material shown in FIG.
2 shows. The impact resistant structural material of the embodiment of the present invention in this comparison is the long girder 1 having a box-shaped cross section having the dimensions shown in FIGS. 13 and 14, and the composite material tube 3 having a rectangular cross section is as shown in FIG. At a corner near the end and having a corner dropper 8 with a side of 10 mm diagonally cut, and as shown in FIG. 16, a thickness of 0.2 mm and a length of 5 mm between the end layers, 7 m
A portion 1 in which two film-like layer materials 10 of m are sandwiched and laminated.
1 is provided, and the impact resistant structural material of the conventional example does not have the corner drop 9 at the corners of the end of the composite material tube 3 having a rectangular cross section and the film-like layer material 10 between the end layers.
【００２１】図１１、図１２のグラフで明らかなように
実施例の耐衝撃構造材は、従来例の耐衝撃構造材に比
べ、図１９に示す安定な順次破壊モードに移行するまで
の間に生ずる過大な初期反力立ち上がり１３が著しく抑
制され、かつ従来例の耐衝撃構造材と同等の吸収エネル
ギーを示していることが判る。As is apparent from the graphs of FIGS. 11 and 12, the impact resistant structural material of the embodiment is compared with the impact resistant structural material of the conventional example until the stable sequential failure mode shown in FIG. 19 is reached. It can be seen that the excessive initial reaction force rise 13 that occurs is significantly suppressed and exhibits the same absorbed energy as the conventional impact resistant structural material.
【００２２】[0022]
【発明の効果】以上の説明で判るように本発明の耐衝撃
構造材は、複合材チューブ特有の衝撃エネルギ吸収上極
めて好ましい安定な順次破壊モードに移行するまでの間
に生ずる過大な初期反力立ち上りを、工作容易な構造で
抑制し、複合材チューブの持つ優れたエネルギ吸収能力
を引き出すことができ、無論普段は通常運用荷重に対し
て荷重伝達する軽量な主要構造部材として使用可能であ
る。従って、ヘリコプタをはじめ、軽量かつ高い衝撃吸
収能力を必要とする実機耐衝撃構造に極めて有用であ
る。As can be seen from the above description, the impact resistant structural material of the present invention has an excessive initial reaction force generated during the transition to the stable sequential fracture mode which is extremely preferable for absorbing the impact energy peculiar to the composite material tube. The rise can be suppressed by a structure that is easy to work, and the excellent energy absorption capacity of the composite material tube can be brought out, and of course, it can be used as a lightweight main structural member that normally transfers load to normal operating load. Therefore, it is very useful for a helicopter as well as a shock-resistant structure for an actual machine that requires lightweight and high shock absorption capacity.
【図１】本発明の耐衝撃構造材の一実施形態を示す斜視
図である。FIG. 1 is a perspective view showing an embodiment of an impact resistant structural material of the present invention.
【図２】本発明の耐衝撃構造材の別の一実施形態を示す
斜視図である。FIG. 2 is a perspective view showing another embodiment of the impact resistant structural material of the present invention.
【図３】ａ〜ｆは図１，図２に示される本発明の耐衝撃
構造材に配設される複合材チューブの斜視図で、その端
部周壁に配設された開口の各種形状を示す。3A to 3F are perspective views of a composite material tube provided in the impact resistant structural material of the present invention shown in FIGS. 1 and 2, showing various shapes of openings provided in an end peripheral wall thereof. Show.
【図４】ａ〜ｊは本発明の耐衝撃構造材に配設される複
合材チューブの各種断面形状を示す図である。4A to 4J are views showing various cross-sectional shapes of a composite material tube arranged in an impact resistant structural material of the present invention.
【図５】角部の端部に角落としを設けた複合材チューブ
を示す斜視図である。FIG. 5 is a perspective view showing a composite material tube in which a corner drop is provided at an end of a corner portion.
【図６】本発明の耐衝撃構造材の他の実施形態を示す斜
視図である。FIG. 6 is a perspective view showing another embodiment of the impact resistant structural material of the present invention.
【図７】本発明の耐衝撃構造材のさらに他の実施形態を
示す斜視図である。FIG. 7 is a perspective view showing still another embodiment of the impact resistant structural material of the present invention.
【図８】ａは、図６，図７の耐衝撃構造材に配設される
複合材チューブの一例を示す端部破断斜視図、ｂはその
複合材チューブの端部の部分圧潰を示す図である。8A is an end broken perspective view showing an example of a composite material tube disposed in the impact resistant structural material of FIGS. 6 and 7, and FIG. 8B is a view showing partial crushing of the end portion of the composite material tube. Is.
【図９】ａは、図６，図７の耐衝撃構造材に配設される
複合材チューブの他の例を示す斜視図、ｂはその複合材
チューブの端部の部分圧潰を示す図である。9A is a perspective view showing another example of the composite material tube disposed in the impact resistant structural material of FIGS. 6 and 7, and FIG. 9B is a view showing partial crushing of the end portion of the composite material tube. is there.
【図１０】ヘリコプタの骨格構造を示す斜視図である。FIG. 10 is a perspective view showing a skeletal structure of a helicopter.
【図１１】本発明の図１３の耐衝撃構造材と図１７の従
来例の耐衝撃構造材との荷重一変位特性試験及び解析結
果の比較を示すグラフである。11 is a graph showing a comparison of load-displacement characteristic test and analysis results of the impact resistant structural material of FIG. 13 of the present invention and the conventional impact resistant structural material of FIG.
【図１２】本発明の図１４の耐衝撃構造材と図１７の従
来例の耐衝撃構造材との荷重一変位特性試験及び解析結
果の比較を示すグラフである。FIG. 12 is a graph showing a comparison of load-displacement characteristic test and analysis results of the impact resistant structural material of FIG. 14 of the present invention and the conventional impact resistant structural material of FIG.
【図１３】図１１の荷重一変位特性比較に用いた本発明
の耐衝撃構造材の寸法を示す斜視図である。13 is a perspective view showing the dimensions of the impact resistant structural material of the present invention used for the load-displacement characteristic comparison of FIG. 11.
【図１４】図１２の荷重一変位特性比較に用いた本発明
の耐衝撃構造材の寸法を示す斜視図である。14 is a perspective view showing the dimensions of the impact resistant structural material of the present invention used for the load-displacement characteristic comparison of FIG.
【図１５】図１３の耐衝撃構造材における複合材チュー
ブの寸法を示す斜視図である。15 is a perspective view showing the dimensions of the composite material tube in the impact resistant structural material of FIG. 13. FIG.
【図１６】図１４の耐衝撃構造材における複合材チュー
ブの寸法を示す斜視図である。16 is a perspective view showing the dimensions of the composite material tube in the impact resistant structural material of FIG. 14. FIG.
【図１７】従来の耐衝撃構造材を示す斜視図である。FIG. 17 is a perspective view showing a conventional impact resistant structural material.
【図１８】複合材チューブ特有の衝撃エネルギ吸収上極
めて好ましい安定な順次破壊モードを示す図である。FIG. 18 is a diagram showing a stable sequential fracture mode that is extremely preferable in terms of absorbing impact energy specific to a composite material tube.
【図１９】複合材チューブのチューブ穴軸方向圧潰時の
一般的な荷重一変位特性を示すグラフと複合材チューブ
の圧潰進行状態を示す図である。FIG. 19 is a graph showing a general load-displacement characteristic when the composite material tube is crushed in the tube hole axial direction, and a diagram showing a crushing progress state of the composite material tube.
１ 箱形断面の長尺桁 ２ ウエブ ３ 複合材チューブ ４，４′ 耐衝撃構造材 ５ 薄板材 ６ 低密度コア材 ７ 開口 ８ 角落とし ９，９′耐衝撃構造材 １０ フィルム状層材 １１ 積層した部分 １２ 隙間 1 Box-shaped long girder 2 web 3 composite material tubes 4,4 'Impact resistant structural material 5 Thin plate material 6 Low density core material 7 openings 8 corner drop 9,9 'impact resistant structural material 10 Film layer material 11 Stacked parts 12 gaps
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開2000−274472（ＪＰ，Ａ) 特開 平８−188174（ＪＰ，Ａ) 特開 平８−174726（ＪＰ，Ａ) 特開 平６−123323（ＪＰ，Ａ) 実開 昭58−86941（ＪＰ，Ｕ) 特表 昭58−501582（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B64C 1/06 B60R 21/02 F16F 7/12 ─────────────────────────────────────────────────── Continued Front Page (56) References JP 2000-274472 (JP, A) JP 8-188174 (JP, A) JP 8-174726 (JP, A) JP 6-123323 (JP, A) Actual development Sho 58-86941 (JP, U) Special table Sho 58-501582 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) B64C 1/06 B60R 21 / 02 F16F 7/12
Claims (9)
方向に間隔を存して、または、他の長尺桁との交差中央
部に、または、その両方に、複合材チューブを桁長手方
向及びウエブ板厚方向と垂直をなす方向にチューブ穴軸
方向が向くように配置した耐衝撃構造材であって、前記
複合材チューブの端部周壁に複数の開口を、複合材チュ
ーブの中央部に向って複合材チューブ断面に占める開口
面積が次第に小さくなるように配設したことを特徴とす
る耐衝撃構造材。1. A composite material tube at a web portion of a long girder having a box-shaped cross section, at intervals in a longitudinal direction of the girder, or at a central portion intersecting with another long girder, or both of them. Is a shock-resistant structural material in which the tube hole axial direction is oriented in a direction perpendicular to the girder longitudinal direction and the web plate thickness direction, and a plurality of openings are formed in the end peripheral wall of the composite material tube, The impact resistant structural material is characterized in that the opening area occupied by the cross section of the composite material tube is gradually reduced toward the central part of the structure.
形、四角形、多角形断面、さらにはそれら大小のものを
複数本束ねたもののいずれかであることを特徴とする請
求項１記載の耐衝撃構造材。2. The composite tube according to claim 1, wherein the composite tube is any one of a circular shape, an elliptical shape, a triangular shape, a quadrangular shape, a polygonal cross section, and a bundle of a plurality of large and small ones. Impact structure material.
低密度コア材とともに複合材チューブを挾んで形成され
ていることを特徴とする請求項１または２記載の耐衝撃
構造材。3. The impact resistant structural material according to claim 1 or 2, wherein the long girder web having a box-shaped cross section is formed by sandwiching a composite material tube together with a low density core material from a thin plate material. .
開口の形状が、円形半円形、長円形、半長円形、スリッ
ト、三角形、四角形、または、多角形であることを特徴
とする請求項１〜３いずれかに記載の耐衝撃構造材。4. The shape of the opening provided on the end peripheral wall of the composite material tube is a circular semicircle, an ellipse, a semi-oval, a slit, a triangle, a quadrangle, or a polygon. Item 6. The impact resistant structural material according to any one of items 1 to 3.
開口が、断面角形の複合材チューブの場合、端部の角部
に配設されていることを特徴とする請求項１〜４いずれ
かに記載の耐衝撃構造材。5. The composite material tube according to claim 1, wherein the opening provided on the peripheral wall of the end portion of the composite material tube is arranged at a corner portion of the end portion in the case of the composite material tube having a rectangular cross section. Impact resistant structural material described in Crab.
方向に間隔を存して、または、他の長尺桁との交差中央
部に、または、その両方に、複合材チューブを桁長手方
向及びウエブ板厚方向と垂直をなす方向にチューブ穴軸
方向が向くように配置した耐衝撃構造材であって、前記
複合材チューブが肉厚方向で複数の層に構成され、その
複合材チューブの端部層間に母材に比して強度の低いフ
ィルム状層材を挾んで積層していることを特徴とする耐
衝撃構造材。6. A composite material tube at a web portion of a long girder having a box-shaped cross section, at intervals in a longitudinal direction of the girder, or at a central portion intersecting with another long girder, or both of them. Is a shock-resistant structural material in which the tube hole axis direction is oriented in a direction perpendicular to the girder longitudinal direction and the web plate thickness direction, wherein the composite material tube is formed in a plurality of layers in the thickness direction, A shock-resistant structural material, characterized in that a film-like layer material having lower strength than the base material is sandwiched between the end layers of the composite material tube.
方向に間隔を存して、または、他の長尺桁との交差中央
部に、または、その両方に、複合材チューブを桁長手方
向及びウエブ板厚方向と垂直をなす方向にチューブ穴軸
方向が向くように配置した耐衝撃構造材であって、前記
複合材チューブが肉厚方向で複数の層に構成され、その
複合材チューブの端部層間にフィルム状層材を挾んで成
形した後、前記フィルム状層材を除去して端部層間に隙
間を形成したことを特徴とする耐衝撃構造材。7. A composite material tube at a web portion of a long girder having a box-shaped cross section, at intervals in a longitudinal direction of the girder, or at a central portion intersecting with another long girder, or both of them. Is a shock-resistant structural material in which the tube hole axis direction is oriented in a direction perpendicular to the girder longitudinal direction and the web plate thickness direction, wherein the composite material tube is formed in a plurality of layers in the thickness direction, A shock-resistant structural material, characterized in that a film-like layer material is sandwiched between the end layers of a composite material tube to be molded, and then the film-like layer material is removed to form a gap between the end layer layers.
おいて、箱形断面の長尺桁のウエブが、薄板材で低密度
コア材とともに複合材チューブを挾んで形成されている
ことを特徴とする耐衝撃構造材。8. The impact resistant structural material according to claim 6, wherein the web of the long girder having a box-shaped cross section is formed of a thin plate material with a low density core material sandwiching a composite material tube. Impact resistant structural material.
るフィルム状層材が、Ｘ線を使った非破壊検査を容易に
するための造影剤を含んでいることを特徴とする請求項
６〜８いずれかに記載の耐衝撃構造材。9. The film-like layer material sandwiched between the layers of the composite material tube contains a contrast agent for facilitating nondestructive inspection using X-rays. The impact resistant structural material according to any one of to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000176532A JP3486839B2 (en) | 2000-06-13 | 2000-06-13 | Impact resistant structural material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000176532A JP3486839B2 (en) | 2000-06-13 | 2000-06-13 | Impact resistant structural material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001354197A JP2001354197A (en) | 2001-12-25 |
| JP3486839B2 true JP3486839B2 (en) | 2004-01-13 |
Family
ID=18678250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000176532A Expired - Lifetime JP3486839B2 (en) | 2000-06-13 | 2000-06-13 | Impact resistant structural material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3486839B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005010397A1 (en) | 2003-07-28 | 2005-02-03 | Sumitomo Metal Industries, Ltd. | Impact-absorbing member |
| JP4520367B2 (en) * | 2005-06-07 | 2010-08-04 | 川崎重工業株式会社 | Impact structure of aircraft |
| JP4918567B2 (en) | 2009-04-20 | 2012-04-18 | 三菱重工業株式会社 | Shock absorbing structure and manufacturing method thereof |
| JP5297288B2 (en) * | 2009-07-17 | 2013-09-25 | 三菱重工業株式会社 | Shock absorbing structure |
| JP5407773B2 (en) * | 2009-11-06 | 2014-02-05 | トヨタ自動車株式会社 | Energy absorption structure |
| JP5129827B2 (en) * | 2010-02-12 | 2013-01-30 | 三菱重工業株式会社 | Shock absorbing structure, shock absorbing structure manufacturing method, and moving body |
| KR20140099456A (en) * | 2011-11-28 | 2014-08-12 | 데이진 가부시키가이샤 | Impact resistant member |
| CN105818972B (en) * | 2015-01-04 | 2018-03-02 | 哈尔滨飞机工业集团有限责任公司 | A kind of adjustable helicopter damping of rigidity |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0089954B1 (en) * | 1981-09-30 | 1987-12-02 | The Boeing Company | Composite structural skin spar joint and method of making |
| JPS5886941U (en) * | 1981-12-08 | 1983-06-13 | 三菱自動車工業株式会社 | shock absorber |
| JP3141570B2 (en) * | 1992-10-09 | 2001-03-05 | 株式会社豊田自動織機製作所 | Energy absorbing material |
| JP3480612B2 (en) * | 1994-12-26 | 2003-12-22 | 本田技研工業株式会社 | Shock absorbing structure |
| JPH08188174A (en) * | 1995-01-11 | 1996-07-23 | Nissan Diesel Motor Co Ltd | Collision shock absorber for vehicle |
| JP3938265B2 (en) * | 1999-01-18 | 2007-06-27 | 横浜ゴム株式会社 | Shock absorber |
-
2000
- 2000-06-13 JP JP2000176532A patent/JP3486839B2/en not_active Expired - Lifetime
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