JP2002225166A - Composite material and method for controlling damage to composite material - Google Patents
Composite material and method for controlling damage to composite materialInfo
- Publication number
- JP2002225166A JP2002225166A JP2001019973A JP2001019973A JP2002225166A JP 2002225166 A JP2002225166 A JP 2002225166A JP 2001019973 A JP2001019973 A JP 2001019973A JP 2001019973 A JP2001019973 A JP 2001019973A JP 2002225166 A JP2002225166 A JP 2002225166A
- Authority
- JP
- Japan
- Prior art keywords
- shape memory
- memory alloy
- composite material
- alloy wire
- hole
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、チタン・ニッケル
形状記憶合金を損傷センサーおよび損傷制御手段として
持つ複合材およびその複合材の損傷制御方法に係り、詳
しくは、複合材の層間剥離が発生し易いリベットやボル
ト結合部にチタン・ニッケル形状記憶合金を損傷センサ
ーおよび損傷制御手段として有する複合材とその損傷制
御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite material having a titanium / nickel shape memory alloy as a damage sensor and a damage control means, and a method for controlling damage to the composite material. The present invention relates to a composite material having a titanium / nickel shape memory alloy as a damage sensor and a damage control means in a rivet or a bolted portion which is easy to use, and a damage control method thereof.
【０００２】[0002]
【従来の技術】航空機や高速車両に適用される複合材
は、衝撃荷重に対して材料内部が損傷を受けやすいとい
う性質を有するため、設計許容値を低く設定し、複合材
本来の持つ強度を生かし切れないでいる。2. Description of the Related Art Composite materials used in aircraft and high-speed vehicles have the property that the inside of the material is easily damaged by impact loads. I can't keep it alive.
【０００３】複合材本来の強度を引き出すために、損傷
を受けた部位を直ちに検知する試みとして、積層構造の
複合材料にチタン・ニッケル形状記憶合金の細線を埋め
込み、細線に電流を流し、マトリックス材料に亀裂や損
傷が生じた際の細線の電流抵抗変化を検出することで、
複合材料に生じた亀裂や損傷を検出する複合材料損傷検
出システムは、特開平８−１５２０８号公報に記載され
ている。[0003] In order to extract the original strength of the composite material, an attempt is made to immediately detect the damaged portion by embedding a fine wire of titanium / nickel shape memory alloy in the composite material having a laminated structure, passing an electric current through the fine wire, By detecting the change in the current resistance of the thin wire when cracks or damage occurs in the
A composite material damage detection system for detecting cracks and damage generated in a composite material is described in JP-A-8-15208.
【０００４】[0004]
【発明が解決しようとする課題】上記公報に開示された
技術手段は、複合材の平滑な表面にチタン・ニッケル形
状記憶合金線を埋め込んだものであるが、複合材では、
隣接する層と層が離れる剥離による損傷がほとんどであ
り、このような剥離を上記技術手段では検出できない。
また損傷は、力が集中する箇所に、まず発生するもので
ある。According to the technical means disclosed in the above publication, a titanium / nickel shape memory alloy wire is embedded in a smooth surface of a composite material.
Most of the damage is caused by peeling of adjacent layers apart, and such peeling cannot be detected by the above technical means.
Damage first occurs at the point where the force is concentrated.
【０００５】本発明は、上記した点を考慮してなされた
もので、応力の集中する部分における複合材の損傷検出
とその損傷の発達を抑制する複合材および複合材の損傷
制御方法を提供することを目的とする。The present invention has been made in consideration of the above points, and provides a composite material and a composite material damage control method for detecting damage to the composite material at a portion where stress is concentrated and suppressing the development of the damage. The purpose is to:
【０００６】[0006]
【課題を解決するための手段】本発明の複合材は、他部
材と結合するために設けられた孔の周辺部で孔に挿通さ
れた固定手段によつて伝達される負荷作用側を引張永久
歪みが与えられた形状記憶合金線でステッチングし、ス
テッチングした形状記憶合金線の両端を孔の周辺部の引
張応力集中側を通して延長し、延長した形状記憶合金線
を引張応力集中部分に接着して構成され、重量の増加と
構造の複雑化を抑制することができる。According to the present invention, there is provided a composite material in which a load acting side transmitted by a fixing means inserted through a hole at a periphery of a hole provided for coupling with another member is permanently pulled. Stitching with a strained shape memory alloy wire, extending both ends of the stitched shape memory alloy wire through the tensile stress concentration side around the hole, and bonding the extended shape memory alloy wire to the tensile stress concentration portion And increase in weight and complication of the structure can be suppressed.
【０００７】本発明の複合材の損傷制御方法は、孔の周
辺部で孔に挿通された固定手段によつて伝達される負荷
の作用側を引張永久歪みが与えられた形状記憶合金線で
ステッチングし、ステッチングした形状記憶合金線を孔
の周辺部の引張応力集中側を通して延長し、延長した形
状記憶合金線を引張応力集中部分に接着し、さらに延長
して計測器および加熱用電源に接続し、複合材に発生す
る損傷を引張応力集中部分に接着した形状記憶合金線の
電気抵抗変化で検出し、この検出信号が発せられたと
き、さらに多量の電流を永久歪みが与えられた形状記憶
合金線に流し、形状記憶合金線のステッチング部を加熱
することで、板厚方向の応力を発生させ、複合材の層間
剥離の進展を抑制することができる。According to the method for controlling damage to a composite material of the present invention, the working side of the load transmitted by the fixing means inserted through the hole at the periphery of the hole is stitched with a shape memory alloy wire having a permanent tensile set. The stitched shape memory alloy wire is extended through the tensile stress concentration side around the hole, the extended shape memory alloy wire is adhered to the tensile stress concentration portion, and further extended to a measuring instrument and a heating power supply. When connected, the damage generated in the composite material is detected by the change in electrical resistance of the shape memory alloy wire adhered to the tensile stress concentration part, and when this detection signal is issued, a larger amount of current is applied to the shape with permanent strain applied By flowing the wire into the memory alloy wire and heating the stitched portion of the shape memory alloy wire, a stress in the thickness direction is generated, and the progress of delamination of the composite material can be suppressed.
【０００８】[0008]
【発明の実施の形態】以下、図面を参照して本発明の実
施の形態について説明する。図１は、他部材と結合する
ために設けられた孔１にボルトまたはリベットのような
固定手段２を装着した複合材３を示す図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing a composite material 3 in which a fixing means 2 such as a bolt or a rivet is attached to a hole 1 provided for coupling with another member.
【０００９】複合材３を図１で矢印Ａ方向に引張ると、
複合材３の孔１の周辺領域は、引張りを受けた固定手段
２によって伝達される負荷作用領域、すなわち孔１の周
辺で力の作用線方向に圧縮による歪みが生じる圧縮領域
４と、孔１の周辺で負荷の作用方向と直交する側の引張
応力集中側、すなわち孔１の周辺で引張りによる歪みが
生じる引張り領域５に区分けされる。When the composite material 3 is pulled in the direction of arrow A in FIG.
The area around the hole 1 of the composite material 3 is a load action area transmitted by the fixing means 2 under tension, that is, a compression area 4 around the hole 1 where a strain due to compression occurs in the direction of action of force around the hole 1, Is divided into a tensile stress concentration side on the side perpendicular to the direction of load application, that is, a tensile region 5 in which distortion occurs due to tension around the hole 1.
【００１０】上記複合材３において、固定手段２による
フアスナ部分で面圧破壊が生じると、孔１の縁が固定手
段２の反力により変形し、圧縮領域４から層間剥離が発
生し進展する。多連固定手段の場合には、面圧破壊が生
じると、その固定手段にかかる力が緩和され、引張り領
域５の歪みも緩和されることになる。[0010] In the composite material 3, when the surface pressure is broken at the fastener portion by the fixing means 2, the edge of the hole 1 is deformed by the reaction force of the fixing means 2, and delamination is generated from the compressed area 4 and propagates. In the case of the multiple fixing means, when the surface pressure fracture occurs, the force applied to the fixing means is reduced, and the strain in the tensile region 5 is also reduced.
【００１１】本発明の複合材１０は、図２および図３に
示すように、孔１の周辺で圧縮による歪みが生じる圧縮
領域４に対応する部位１１に、引張永久歪みが与えられ
た形状記憶合金線（チタン・ニッケル形状記憶合金線）
１２でステッチングされている。ステッチングされた形
状記憶合金線１２の両端１２ａ，１２ｂは、孔の周辺部
の引張り領域５に対応する部位１３を通って延長し、延
長した形状記憶合金線１２ａ，１２ｂは、引張り領域５
に対応する引張応力集中部分において接着される。As shown in FIG. 2 and FIG. 3, the composite material 10 of the present invention has a shape memory in which a permanent set is given to a portion 11 corresponding to a compression region 4 where a strain due to compression occurs around the hole 1. Alloy wire (titanium / nickel shape memory alloy wire)
12 is stitched. Both ends 12a, 12b of the stitched shape memory alloy wire 12 extend through a portion 13 corresponding to the tensile region 5 around the hole, and the extended shape memory alloy wires 12a, 12b
Are adhered at the tensile stress concentrated portions corresponding to.
【００１２】複合材１０は、図２に示すように、両端部
１２ａ，１２ｂに計測器１４および加熱用電源１５が並
列に接続される。計測器１４は、図示しない制御装置に
接続される。制御装置は、計測器１４から発する検出信
号を受けて、加熱用電源１５からの電流をステッチング
した形状記憶合金線１２に送る。As shown in FIG. 2, a measuring instrument 14 and a heating power supply 15 are connected to both ends 12a and 12b of the composite material 10 in parallel. The measuring device 14 is connected to a control device (not shown). The control device receives the detection signal from the measuring device 14 and sends the current from the heating power supply 15 to the stitched shape memory alloy wire 12.
【００１３】引張永久歪みが与えられた形状記憶合金線
１２は、ステッチング部を加熱することで、収縮しよう
として、複合材１０の板厚方向の引っ張り力を発生さ
せ、複合材１０の層間剥離の進展が抑制される。The shape memory alloy wire 12 to which the tensile permanent strain has been applied tends to shrink by heating the stitching portion, thereby generating a tensile force in the thickness direction of the composite material 10 and causing the composite material 10 to delaminate. Progress is suppressed.
【００１４】つぎに、複合材１０の成形方法を説明す
る。Next, a method of forming the composite material 10 will be described.
【００１５】積層して成形される複合材の層間剥離の発
生可能性が高い部分、たとえば、リベット等に当接して
繊維に平行な方向に圧縮力を受ける部分の周辺をチタン
・ニッケル形状記憶合金線でステツチングし、最終的な
配線状態に引き回しておく。この場合、形状記憶合金線
に離型剤を塗布しておくことが好ましい。[0015] A titanium-nickel shape memory alloy is formed around a portion of the composite material formed by lamination where the possibility of delamination is high, for example, a portion which comes into contact with a rivet and receives a compressive force in a direction parallel to the fiber. Stitching is performed with a wire and routed to a final wiring state. In this case, it is preferable to apply a release agent to the shape memory alloy wire.
【００１６】成形は通常加熱して行われ、成形後、成形
した複合材素材からステッチングした形状記憶合金線を
強制的に引き抜き、さらに、形状記憶合金線の平面的に
配置された部分を樹脂を剥がしながら取り出す。The molding is usually carried out by heating. After the molding, the stitched shape memory alloy wire is forcibly pulled out of the formed composite material, and the planarly arranged portion of the shape memory alloy wire is removed with a resin. Remove and remove.
【００１７】つぎに、引き抜いた形状記憶合金線または
別に用意したに形状記憶合金線に常温下で所定の引張永
久歪を与える。そして、引張永久歪が与えられた形状記
憶合金線を複合材素材に形成された元のステッチング孔
に戻す。この場合、形状記憶合金線に常温硬化形接着剤
を塗布しておくことが好ましい。そして、形状記憶合金
線をステッチングした後のステッチング孔に間隙を満た
すように接着剤を充填する。Next, a predetermined tensile permanent strain is applied to the drawn shape memory alloy wire or a separately prepared shape memory alloy wire at room temperature. Then, the shape memory alloy wire to which the permanent tensile strain has been applied is returned to the original stitching hole formed in the composite material. In this case, it is preferable to apply a cold-setting adhesive to the shape memory alloy wire. Then, an adhesive is filled so as to fill the gap in the stitching hole after the stitching of the shape memory alloy wire.
【００１８】つぎに、複合材素材の元のステッチング孔
に戻した形状記憶合金線の両端部を複合材素材の平面部
の樹脂を剥がした部分に配線し、配線した形状記憶合金
線を接着剤により複合材素材に接着固定する。このと
き、特願平１２−３６８７７４号に記載された表面処理
を施すことが望ましい。Next, both ends of the shape memory alloy wire returned to the original stitching holes of the composite material are wired to portions where the resin is peeled off from the flat portion of the composite material, and the wired shape memory alloy wires are bonded. The adhesive is fixed to the composite material by the agent. At this time, it is desirable to perform a surface treatment described in Japanese Patent Application No. 12-368774.
【００１９】最後に、複合材素材の表面を元の状態に修
復する。これにより、複合材１０が成形される。Finally, the surface of the composite material is restored to its original state. Thereby, the composite material 10 is formed.
【００２０】形状記憶合金線の複合材素材への別の設置
方法を図４により説明する。Another method of installing the shape memory alloy wire on the composite material will be described with reference to FIG.
【００２１】まず、下型２０および治具２１を準備す
る。下型２０には、ステッチングされるべき形状記憶合
金線のステッチング間隔に対応した細い孔２２と、位置
合わせ孔２３とが設けられている。同様に、治具２１に
は、下型２０の孔２２および位置合わせ孔２３に対応し
た貫通孔２４および位置合わせ孔２５が設けられてい
る。First, a lower mold 20 and a jig 21 are prepared. The lower die 20 is provided with a narrow hole 22 corresponding to a stitch interval of a shape memory alloy wire to be stitched, and a positioning hole 23. Similarly, the jig 21 is provided with a through hole 24 and a positioning hole 25 corresponding to the hole 22 and the positioning hole 23 of the lower die 20.
【００２２】つぎに、下型２０の上にプリプレグ２６を
積層し、積層したプリプレグ２６の上に治具２１を配置
する。治具２１は、治具２１の位置合わせ孔２５が下型
２０に設けた位置合わせ孔２３に一致するように下型２
０に整合される。Next, the prepreg 26 is laminated on the lower mold 20 and the jig 21 is arranged on the laminated prepreg 26. The jig 21 is set so that the positioning hole 25 of the jig 21 matches the positioning hole 23 provided in the lower die 20.
Matched to zero.
【００２３】整合された下型２０および治具２１は、ノ
ックピン２７を治具２１の上から位置合わせ孔２５を通
して下型２０に設けた位置合わせ孔２３に装着すること
て゛結合される。The aligned lower mold 20 and jig 21 are joined by mounting the knock pin 27 from above the jig 21 through the alignment hole 25 into the alignment hole 23 provided in the lower mold 20.
【００２４】つぎに、ピン２８を治具２１の上から孔２
４および積層したプリプレグ２６を通して下型２０に設
けた孔２２に装着する。この場合、ピン２８に離型剤を
塗布しておくことが好ましい。ピン２８が細くて剛性が
足りずプリプレグ２６を貫通して下型２０の孔２２に嵌
合できない場合には、必要な剛性を備えた太いピンを通
した後に、所定の太さのピン２８を下型２０に設けた孔
２２に装着する。この場合、下型２０に設けた孔２２に
装着したピン２８は、プリプレグ２６からの突出長さを
調節するために、治具２１を取り外した後に所定長さに
切断される。Next, the pin 28 is inserted into the hole 2 from above the jig 21.
4 and through the laminated prepreg 26, and attached to the hole 22 provided in the lower mold 20. In this case, it is preferable to apply a release agent to the pins 28. If the pin 28 is too thin to have enough rigidity to penetrate the prepreg 26 and fit into the hole 22 of the lower die 20, after passing through a thick pin having the required rigidity, the pin 28 having a predetermined thickness is removed. It is mounted in the hole 22 provided in the lower mold 20. In this case, the pin 28 attached to the hole 22 provided in the lower mold 20 is cut to a predetermined length after the jig 21 is removed in order to adjust the length of the protrusion from the prepreg 26.
【００２５】積層したプリプレグ２６の表面部に形状記
憶合金線１２を配線する場合、プリプレグ２６の表面部
の配線される形状記憶合金線１２に対応する部位に離型
剤を塗布しておく。When wiring the shape memory alloy wire 12 on the surface of the laminated prepreg 26, a release agent is applied to a portion of the surface of the prepreg 26 corresponding to the shape memory alloy wire 12 to be wired.
【００２６】積層したプリプレグ２６を硬化させる際に
は、図５に示すように、積層したプリプレグ２６の上
に、プリプレグ２６から突出するピン２８を挿入できる
長さの孔を所定位置に設けたコールプレート２９を配置
し、コールプレート２９の孔にプリプレグ２６から突出
するピン２８の突出部分を装着する。When the laminated prepreg 26 is cured, as shown in FIG. 5, a call is provided on the laminated prepreg 26 at a predetermined position with a hole having a length capable of inserting a pin 28 projecting from the prepreg 26. The plate 29 is arranged, and the protruding portion of the pin 28 protruding from the prepreg 26 is attached to the hole of the call plate 29.
【００２７】積層したプリプレグ２６は、バッグフィル
ム３０により覆われ、真空引きされた後、樹脂を加熱硬
化して複合材素材に成形される。The laminated prepreg 26 is covered with a bag film 30, evacuated, and then heat-cured to form a composite material.
【００２８】硬化された複合材素材は、コールプレート
２９を取り外し、ピン２８を引き抜いた後、形状記憶合
金線が剥がされる。From the cured composite material, the shape memory alloy wire is peeled off after removing the coal plate 29 and pulling out the pin 28.
【００２９】つぎに、ピン２８を引き抜き形状記憶合金
線を剥し複合材素材に形成された孔や溝の端部が整形処
理され、複合材素材の整形された孔や溝に常温硬化型接
着剤が充填され、所定の引張永久歪が与えられた形状記
憶合金線が張力を加えた状態で配線される。このとき、
前述したように、形状記憶合金線に表面処理を施すこと
が望ましい。Next, the pin 28 is pulled out, the shape memory alloy wire is peeled off, and the ends of the holes and grooves formed in the composite material are subjected to shaping processing. Is filled, and a shape memory alloy wire given a predetermined tensile permanent strain is wired under tension. At this time,
As described above, it is desirable to apply a surface treatment to the shape memory alloy wire.
【００３０】しかして、複合材１０に配線された形状記
憶合金線１２をセンサあるいはアクチュエータとして作
用させるには、図２に示すように、両端部１２ａ，１２
ｂに計測器１４および加熱用電源１５を接続し、形状記
憶合金線１２に微弱電流を流して、その抵抗値を計測器
１４によりモニタリングする。In order to make the shape memory alloy wire 12 wired on the composite material 10 function as a sensor or an actuator, as shown in FIG.
b, a measuring device 14 and a heating power supply 15 are connected, a weak current is passed through the shape memory alloy wire 12, and the resistance value is monitored by the measuring device 14.
【００３１】図１に示すように、ボルト結合された部材
に引張力が働くと、力の方向と直交するボルト横部５に
集中応力が働き、形状記憶合金線１２に引張り歪みが発
生し、形状記憶合金線１２の抵抗値が変化する。As shown in FIG. 1, when a tensile force acts on the bolted member, concentrated stress acts on the bolt lateral portion 5 perpendicular to the direction of the force, and tensile strain occurs on the shape memory alloy wire 12, The resistance value of the shape memory alloy wire 12 changes.
【００３２】複合材１０に図６に示すような層間剥離が
発生すると、図示しない他のボルトに引張り力が作用す
ることになり、ボルト横部５の部分の歪みが小さくな
り、形状記憶合金線１２の抵抗値が変化する。この後、
引張り力が増えても、抵抗値は変動するが、剥離のなか
つた時の値にならない。こうして、圧縮領域４に層間剥
離が発生したことを検知することができる。When delamination occurs in the composite material 10 as shown in FIG. 6, a tensile force acts on another bolt (not shown), and the distortion of the bolt lateral portion 5 is reduced, and the shape memory alloy wire is removed. Twelve resistance values change. After this,
Even if the tensile force increases, the resistance value fluctuates, but does not reach the value when there was no peeling. Thus, the occurrence of delamination in the compressed region 4 can be detected.
【００３３】このとき、形状記憶合金線１２を逆変態温
度（約８０℃）以上に加熱するような電流を形状記憶合
金線１２に流し、形状記憶合金線１２が逆変態温度（約
８０℃）以上に加熱されると、図７に示すように、合金
内に収縮しようとするとともに、合金のヤング率が２倍
から３倍に増大し、複合材１０の層と層とを締め付け合
う力が増大し、複合材１０の層間剥離が抑制される。At this time, a current is applied to the shape memory alloy wire 12 so as to heat the shape memory alloy wire 12 to the reverse transformation temperature (about 80 ° C.) or more, and the shape memory alloy wire 12 is heated to the reverse transformation temperature (about 80 ° C.). When heated as described above, as shown in FIG. 7, while trying to shrink into the alloy, the Young's modulus of the alloy increases from 2 to 3 times, and the force for tightening the layers of the composite material 10 increases. In this case, delamination of the composite material 10 is suppressed.
【００３４】[0034]
【発明の効果】本発明の複合材は、他部材と結合するた
めに設けられた孔の周辺部で孔に挿通された固定手段に
よつて伝達される負荷作用側を引張り永久歪みが与えら
れた形状記憶合金線でステッチングし、ステッチングし
た形状記憶合金線の両端を孔の周辺部の引張応力集中側
を通して延長し、延長した形状記憶合金線を引張応力集
中部分に接着したので、１つの部材でありながら、セン
サー機能とアクチュエータ機能を備えさせることができ
る。According to the composite material of the present invention, a permanent strain is applied to the load acting side transmitted by the fixing means inserted through the hole at the periphery of the hole provided for coupling with another member. Stitched with the expanded shape memory alloy wire, the both ends of the stitched shape memory alloy wire were extended through the tensile stress concentration side of the periphery of the hole, and the extended shape memory alloy wire was bonded to the tensile stress concentrated portion. Although it is one member, it can be provided with a sensor function and an actuator function.
【００３５】本発明の複合材の損傷制御方法は、孔の周
辺部で孔に挿通された固定手段によつて伝達される負荷
の作用側を引張永久歪みが与えられた形状記憶合金線で
ステッチングし、ステッチングした形状記憶合金線を孔
の周辺部の引張応力集中側を通して延長し、延長した形
状記憶合金線を引張応力集中部分に接着し、さらに延長
して計測器および加熱用電源に接続し、複合材に発生す
る損傷を引張応力集中部分に接着した形状記憶合金線の
電気抵抗変化で検出し、この検出信号が発せられたと
き、さらに多量の電流を永久歪みが与えられた形状記憶
合金線に流し、形状記憶合金線のステッチング部を加熱
することで、複合材の板厚方向の力を発生させ、複合材
の層間剥離の進展を抑制することができる。In the method for controlling damage to a composite material according to the present invention, the working side of the load transmitted by the fixing means inserted through the hole at the periphery of the hole is stitched with a shape memory alloy wire having a permanent tensile strain. The shape memory alloy wire which has been stitched and stitched is extended through the tensile stress concentration side of the periphery of the hole, the extended shape memory alloy wire is adhered to the tensile stress concentration portion, and further extended to the measuring instrument and the heating power supply When connected, the damage generated in the composite material is detected by the change in electrical resistance of the shape memory alloy wire adhered to the tensile stress concentration part, and when this detection signal is issued, a larger amount of current is applied to the shape with permanent strain applied By flowing into the memory alloy wire and heating the stitched portion of the shape memory alloy wire, a force in the thickness direction of the composite material is generated, and the progress of delamination of the composite material can be suppressed.
【図１】複合材の引張りにより孔の周辺に形成される圧
縮領域と引張り領域を示す図。FIG. 1 is a diagram showing a compression region and a tension region formed around a hole by tension of a composite material.
【図２】本発明による複合材の使用状態を示す図。FIG. 2 is a view showing a use state of a composite material according to the present invention.
【図３】図２の複合材の断面図。FIG. 3 is a sectional view of the composite of FIG. 2;
【図４】本発明による複合材の製造方法の一例の第１段
階を示す図。FIG. 4 is a diagram showing a first stage of an example of the method for producing a composite material according to the present invention.
【図５】本発明による複合材の製造方法の一例の第２段
階を示す図。FIG. 5 is a diagram showing a second stage of an example of the method for producing a composite material according to the present invention.
【図６】複合材に層間剥離が発生した状態を示す図。FIG. 6 is a diagram showing a state in which delamination has occurred in a composite material.
【図７】層間剥離した複合材の進展を抑制した状態を示
す図。FIG. 7 is a view showing a state in which the progress of the delaminated composite material is suppressed.
４ 圧縮領域 ５ 応力が集中する引張り領域 １０ 複合材 １２ 形状記憶合金線 １４ 計測器 １５ 加熱用電源 4 Compression area 5 Tension area where stress is concentrated 10 Composite material 12 Shape memory alloy wire 14 Measuring instrument 15 Heating power supply
───────────────────────────────────────────────────── フロントページの続き (72)発明者 荻 巣 敏 充 東京都新宿区西新宿一丁目７番２号 富士 重工業株式会社内 Ｆターム(参考） 2G050 AA02 BA12 EB02 2G060 AA10 AD04 AE01 AF07 EA06 EB06 GA03 HC07 HC18 HD01 KA11 4F100 BA11 DH01A GB31 JB13A JK06 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshimitsu Ogisu 1-7-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Fuji Heavy Industries Ltd. F-term (reference) 2G050 AA02 BA12 EB02 2G060 AA10 AD04 AE01 AF07 EA06 EB06 GA03 HC07 HC18 HD01 KA11 4F100 BA11 DH01A GB31 JB13A JK06
Claims (2)
辺部で孔に挿通された固定手段によつて伝達される負荷
作用側を引張永久歪みが与えられた形状記憶合金線でス
テッチングし、ステッチングした形状記憶合金線の両端
を孔の周辺部の引張応力集中側を通して延長し、延長し
た形状記憶合金線を引張応力集中部分に接着したことを
特徴とする複合材。1. A stitched shape memory alloy wire having a permanent tensile strain applied to a load acting side transmitted by a fixing means inserted through a hole at a periphery of a hole provided for coupling with another member. A composite material characterized in that both ends of a shaped and stitched shape memory alloy wire are extended through a tensile stress concentration side of a periphery of a hole, and the extended shape memory alloy wire is adhered to a tensile stress concentration portion.
つて伝達される負荷の作用側を引張永久歪みが与えられ
た形状記憶合金線でステッチングし、ステッチングした
形状記憶合金線を孔の周辺部の引張応力集中側を通して
延長し、延長した形状記憶合金線を引張応力集中部分に
接着し、さらに延長して計測器および加熱用電源に接続
し、複合材に発生する損傷を引張応力集中部分に接着し
た形状記憶合金線の電気抵抗変化で検出し、この検出信
号が発せられたとき、さらに多量の電流を永久歪みが与
えられた形状記憶合金線に流し、形状記憶合金線のステ
ッチング部を加熱することを特徴とする複合材の損傷制
御方法。2. A stitched shape memory alloy in which the working side of a load transmitted by a fixing means inserted through the hole at the periphery of the hole is stitched with a shape memory alloy wire provided with a permanent tensile set. Extend the wire through the tensile stress concentration side of the periphery of the hole, glue the extended shape memory alloy wire to the tensile stress concentration part, further extend it and connect it to the measuring instrument and heating power supply, damage to the composite material Is detected by the change in electrical resistance of the shape memory alloy wire adhered to the tensile stress concentration portion, and when this detection signal is issued, a larger amount of current is applied to the shape memory alloy wire to which permanent strain is applied, and A method for controlling damage to a composite material, comprising heating a stitched portion of a wire.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015194461A (en) * | 2013-11-18 | 2015-11-05 | 富士重工業株式会社 | Sample and current measurement method |
| JP2016183885A (en) * | 2015-03-26 | 2016-10-20 | 富士重工業株式会社 | Composite material and method for manufacturing the same |
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| JPH06212018A (en) * | 1993-01-14 | 1994-08-02 | Yasubumi Furuya | Polymer-based material having composite functions |
| JPH0815208A (en) * | 1994-06-30 | 1996-01-19 | Mitsubishi Heavy Ind Ltd | Composite material damage detecting system |
| JPH0860874A (en) * | 1994-06-13 | 1996-03-05 | Takenaka Komuten Co Ltd | Self-diagnostic member and self-restoring member and structural steel material having these function and damage detection system of structure |
| JPH09176330A (en) * | 1995-12-26 | 1997-07-08 | Kagaku Gijutsu Shinko Jigyodan | Composite material with fracture propagation-proof function and fracture propagation-proofing system |
| JP2000334888A (en) * | 1999-05-28 | 2000-12-05 | Fuji Heavy Ind Ltd | Composite material and damage control method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06212018A (en) * | 1993-01-14 | 1994-08-02 | Yasubumi Furuya | Polymer-based material having composite functions |
| JPH0860874A (en) * | 1994-06-13 | 1996-03-05 | Takenaka Komuten Co Ltd | Self-diagnostic member and self-restoring member and structural steel material having these function and damage detection system of structure |
| JPH0815208A (en) * | 1994-06-30 | 1996-01-19 | Mitsubishi Heavy Ind Ltd | Composite material damage detecting system |
| JPH09176330A (en) * | 1995-12-26 | 1997-07-08 | Kagaku Gijutsu Shinko Jigyodan | Composite material with fracture propagation-proof function and fracture propagation-proofing system |
| JP2000334888A (en) * | 1999-05-28 | 2000-12-05 | Fuji Heavy Ind Ltd | Composite material and damage control method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015194461A (en) * | 2013-11-18 | 2015-11-05 | 富士重工業株式会社 | Sample and current measurement method |
| US9575097B2 (en) | 2013-11-18 | 2017-02-21 | Fuji Jukogyo Kabushiki Kaisha | Specimen and current measuring method |
| JP2016183885A (en) * | 2015-03-26 | 2016-10-20 | 富士重工業株式会社 | Composite material and method for manufacturing the same |
| US9827743B2 (en) | 2015-03-26 | 2017-11-28 | Subaru Corporation | Composite material and method of making the same |
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|---|---|
| JP4562295B2 (en) | 2010-10-13 |
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