JPH01215533A - Arm member made of frp - Google Patents
Arm member made of frpInfo
- Publication number
- JPH01215533A JPH01215533A JP63040618A JP4061888A JPH01215533A JP H01215533 A JPH01215533 A JP H01215533A JP 63040618 A JP63040618 A JP 63040618A JP 4061888 A JP4061888 A JP 4061888A JP H01215533 A JPH01215533 A JP H01215533A
- Authority
- JP
- Japan
- Prior art keywords
- tensile
- layer
- frp
- circular hole
- arm
- 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.)
- Pending
Links
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 21
- 239000010410 layer Substances 0.000 abstract description 97
- 239000011247 coating layer Substances 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 27
- 239000011151 fibre-reinforced plastic Substances 0.000 description 27
- 229920005989 resin Polymers 0.000 description 12
- 239000011347 resin Substances 0.000 description 12
- 238000005452 bending Methods 0.000 description 9
- 229920000049 Carbon (fiber) Polymers 0.000 description 7
- 239000004917 carbon fiber Substances 0.000 description 7
- 239000000725 suspension Substances 0.000 description 6
- 239000003365 glass fiber Substances 0.000 description 5
- 229920006231 aramid fiber Polymers 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 239000004760 aramid Substances 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009730 filament winding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Vehicle Body Suspensions (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は例えば自動車等車両のサスペンションアーム等
定まわり部品として好適なＦＲＰ製アーム部材に関し、
特に、その疲労寿命を増大させるための構造の改良に関
する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an FRP arm member suitable as a constant rotation component such as a suspension arm of a vehicle such as an automobile.
In particular, it relates to improvements in the structure to increase its fatigue life.
（従来の技術）
近年、自動車等車両の構成部品は、軽量化の要請に伴い
、金属製ものからＦＲＰ （繊維強化プラスチック）製
のものへと変わりつつある。このことは、サスペンショ
ンアーム等定まわり部品と用いられるアーム部材につい
ても同様であるが、この種のアーム部材はその長手方向
に圧縮及び引張の繰返し荷重を受けるので、この種のア
ーム部材なＦＲＰで形成する場合には、圧縮及び引張の
繰返し荷重に対する静的機械的強度及び疲労強度に優れ
た構造にする必要がある。(Prior Art) In recent years, due to the demand for lighter weight components of vehicles such as automobiles, there has been a shift from metal components to FRP (fiber reinforced plastic) components. This also applies to arm members used as constant rotation parts such as suspension arms, but since this type of arm member is subjected to repeated compression and tension loads in its longitudinal direction, this type of arm member made of FRP is If formed, it is necessary to have a structure with excellent static mechanical strength and fatigue strength against repeated compressive and tensile loads.
特開昭５６−１０１４１５号公報にはサスペンションア
ーム等定まわり部品として用いられるＦＲＰ製のアーム
部材が開示されている。この従来のＦＲＰ製アーム部材
は、第６図に示すように、耐圧縮性に優れたＦＲＰ製の
アーム本体１の長手圧縮製に優れたＦＲＰ繊維のアーム
本体Ｉの長手方向両端にそれぞれ取付用円孔２ａを有す
る端部材２を組み付けた状態でアーム本体１及び端部材
２の周囲にＦ ＲＰｇＪの耐引張用外被層３を形成した
構成となっており、耐引張用外被層３は１例えばエポキ
シ樹脂等の熱硬化性樹脂をコートした炭素繊維等のフィ
ラメントをアーム本体ｌの長手方向に巻き付けて加熱硬
化させることにより、アーム本体１の両側面及び端部材
２の外側面に強固に固着形成されている。このような構
成により、軽量化と、アーム本体Ｉによる耐圧縮性の向
上と、耐引張用外被層３による耐久性の向上とが図られ
ている。JP-A-56-101415 discloses an FRP arm member used as a constant rotation component such as a suspension arm. As shown in Fig. 6, this conventional FRP arm member is attached to both longitudinal ends of an FRP arm body 1 made of FRP fibers with excellent compression resistance. With the end member 2 having the circular hole 2a assembled, a tensile-resistant outer covering layer 3 of FRPgJ is formed around the arm body 1 and the end member 2, and the tensile-resistant outer covering layer 3 is 1. For example, by wrapping a filament such as carbon fiber coated with a thermosetting resin such as epoxy resin in the longitudinal direction of the arm body 1 and heating and hardening it, it is firmly attached to both sides of the arm body 1 and the outer surface of the end member 2. Fixed and formed. With this configuration, it is possible to reduce the weight, improve compression resistance due to the arm main body I, and improve durability due to the tensile resistance outer covering layer 3.
（発明が解決しようとする問題点）
上述した従来のＦ ＲＰ製アーム部材に対長手方向に引
張荷重が加わると、円孔２ａの真横付近からアーム部材
の端部までの領域内には長手方向の引張力Ｆが加わると
ともに円孔２ａは楕円変形させるような曲げ干−メント
Ｍが加わる。したがって、円孔２ａの真横付近では引張
応力の他に曲げモーメントにより曲げ応力が生じること
なる。(Problems to be Solved by the Invention) When a tensile load is applied to the above-mentioned conventional FRP arm member in the longitudinal direction, the area from the vicinity of the right side of the circular hole 2a to the end of the arm member is A tensile force F is applied to the circular hole 2a, and a bending stress M is applied to the circular hole 2a to deform it into an ellipse. Therefore, in addition to the tensile stress, bending stress is generated due to the bending moment near the side of the circular hole 2a.
その場合１曲げ応力は円孔２ａの内面側で引張ひずみを
生じさせ、且つ、耐引張用外被層３の外側面側で圧縮ひ
ずみを生じさせるような分布となる。円孔２ａの真横付
近ではこのような曲げ応力分布に対し引張力による引張
応力が加算されるので、曲げ応力と引張応力とを加算し
た応力０の分布は第７図に示すような分布になる。すな
わち端部材２内及び耐引張用外被層３の内側面側では引
張応力が生じ、耐引張用外被層３の外側面側では圧縮応
力が生じる。In this case, the distribution of bending stress is such that a tensile strain is generated on the inner surface of the circular hole 2a and a compressive strain is generated on the outer surface of the tensile-resistant outer covering layer 3. Near the right side of the circular hole 2a, the tensile stress due to the tensile force is added to this bending stress distribution, so the stress distribution of 0, which is the sum of the bending stress and the tensile stress, becomes the distribution shown in Figure 7. . That is, tensile stress occurs within the end member 2 and on the inner side of the tensile-resistant outer covering layer 3, and compressive stress occurs on the outer side of the tensile-resistant outer covering layer 3.
このように、従来のＦＲＰ製アーム部材においては、２
つの端部材２間に引張荷重が加わったときに、円孔２ａ
の真横付近では耐引張用外被層３の内部に引張応力と圧
縮応力とが生じるため、円孔２ａの真横付近の耐引張用
外被３内からの疲労破壊が起こりやすくなっており、疲
労寿命が低下する原因となっていた。In this way, in the conventional FRP arm member, 2
When a tensile load is applied between the two end members 2, the circular hole 2a
Since tensile stress and compressive stress occur inside the tensile resistant outer covering layer 3 near the side of the circular hole 2a, fatigue fracture is likely to occur from within the tensile resistant outer covering 3 near the right side of the circular hole 2a. This caused a decrease in lifespan.
したがって、本発明の課題は、耐引張用外被層内に生じ
る応力を緩和させることにより、ＦＲＰ製アーム部材の
疲労寿命を増大させることにある。Therefore, an object of the present invention is to increase the fatigue life of an FRP arm member by alleviating the stress generated in the tensile-resistant outer covering layer.
（問題点を解決するための手段）
上記課題を解決するために、本発明はＦＲＰ製のアーム
本体の長手方向両端にそれぞれ取付用田孔有する端部材
を組み付け、アーム本体の両側面及び端部材の外側面の
周囲にＦＲＰ製の耐引張用外被層を形成したＦＲＰ製ア
ーム部材において、少なくとも円孔の真横付近の領域に
おける耐引張用外被層を、内装と、該内層の補強繊維よ
りも線膨張係数の大きい補強繊維を有する外層とにより
形成した構成としである。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention assembles end members having mounting holes at both ends in the longitudinal direction of an FRP arm main body, and In an FRP arm member in which a tensile-resistant outer covering layer made of FRP is formed around the outer surface of the arm, the tensile-resistant outer covering layer is formed at least in the area immediately next to the circular hole than the inner layer and the reinforcing fibers of the inner layer. The outer layer also has a reinforcing fiber having a large coefficient of linear expansion.
耐引張用外被層の内層の補強繊維としては引張荷重的線
膨張係数が小さい炭素繊維やアラミド繊維等を用いるこ
とができ、耐引張用外被層の外層の補強繊維としては比
較的繊維膨張係数が大きいガラス繊維やナイロン繊維等
を用いることができる。As reinforcing fibers for the inner layer of the tensile-resistant outer covering layer, carbon fibers, aramid fibers, etc., which have a small coefficient of linear expansion under tensile load, can be used, and as reinforcing fibers for the outer layer of the tensile-resistant outer covering layer, carbon fibers or aramid fibers that have a relatively low coefficient of linear expansion under tensile load can be used. Glass fiber, nylon fiber, etc. having a large coefficient can be used.
以上の構成において、上記ＦＲＰ製アーム部材にあって
は、少な（とも円孔の真横付近の領域におけるＦＲＰ製
の耐引張用外被層が内層と該内層の補強繊維よりも繊維
膨張の大きい補強繊維を有する外層とにより形成される
ので、耐引張の内層及び外層を加熱硬化させたときに、
両者の繊維膨張係数の差により、耐引張用外被層の内層
側には圧縮残留ひずみを生じることになる。他方、耐引
張応性被層の外層側には引張残留ひずみが生じることに
なる。そして、これらの残留ひずみにより、２つの端部
部材に引張荷重が加わったときに円孔の真横付近の耐引
張用外被層も内側面側に生じる引張応力及び耐引張用外
被層の外側面側に生じる圧縮応力を緩・和することが可
能となる。この結果、ＦＲＰ製アーム部材の疲労強度が
高まり、疲労寿命が増大することとなる。In the above configuration, in the above FRP arm member, the tensile-resistant outer covering layer made of FRP in the region immediately beside the circular hole is reinforced with a fiber expansion larger than that of the inner layer and reinforcing fibers of the inner layer. Since it is formed by an outer layer having fibers, when the tensile resistant inner layer and outer layer are heated and hardened,
Due to the difference in fiber expansion coefficients between the two, compressive residual strain is generated on the inner layer side of the tensile-resistant outer covering layer. On the other hand, tensile residual strain will occur on the outer layer side of the tensile stress-resistant coating. Due to these residual strains, when a tensile load is applied to the two end members, the tensile-resistant outer covering layer near the right side of the circular hole also suffers from tensile stress generated on the inner side and the outer tensile-resistant outer covering layer. It becomes possible to relax and relieve the compressive stress generated on the side surface side. As a result, the fatigue strength of the FRP arm member increases and its fatigue life increases.
（実施例）
以下、本発明の実施例を添付した図面に基づいて説明す
る。(Example) Hereinafter, an example of the present invention will be described based on the attached drawings.
第１図ないし第４図は本発明を自動車用サスペンション
アームに適用した場合の第１実施例を示し・たものであ
る。これらの図を参照すると、サスペンションアームと
して用いられるＦＲＰ製アーム部材１０は耐圧縮性に優
れたＦＲＰ性のアーム本体１１と、アーム本体１１の両
端にそれぞれ組み付けられる２つの端部材１２と、アー
ム本体ｌ１の両側面及び２つの端部材１２の外側を包囲
するようにアーム本体１１及び端部材１２の周囲に形成
されたＦＲＰ性の耐引張用外被層１３とを備えている。1 to 4 show a first embodiment in which the present invention is applied to a suspension arm for an automobile. Referring to these figures, an FRP arm member 10 used as a suspension arm consists of an FRP arm body 11 with excellent compression resistance, two end members 12 assembled to both ends of the arm body 11, and an arm body. It is provided with an FRP tensile-resistant outer covering layer 13 formed around the arm main body 11 and the end members 12 so as to surround both sides of the arm l1 and the outside of the two end members 12.
上記アーム本体１１は、第２図に示すように。The arm main body 11 is as shown in FIG.
ここでは、角バイブ状に形成されており、その長手方向
両端は平坦面とされている。また、端部材１２はアーム
本体１１の端面に当接される平坦な端面１２ａを有して
おり、その端面１２ａにはアーム本体１１の端部の開口
に嵌合する嵌合部１２ｂが形成されている。そして、端
部材１２にはそれぞれ取付用円孔１２ｃが形成されてお
り、２つの端部材１２の円孔１２ｃによってアーム部材
１０が車体側とホイール側とに連結されるようになって
いる。ここでは、アーム部材１０の長平方向における端
部材１２の先端から円孔１２ｃの真横付近までの端部材
１２の外側面は円孔１２ｃと同軸の半円筒面となってお
り１円孔１２ｃの真横付近から端部材１２の端面１２ａ
までの外側面がｔ坦面となっている。端部材１２は例え
ばガラス短繊維で補強したナイロン等の熱硬化性樹脂で
作ることができる。Here, it is formed in the shape of a square vibrator, and both longitudinal ends thereof are flat surfaces. Further, the end member 12 has a flat end surface 12a that comes into contact with the end surface of the arm body 11, and a fitting part 12b that fits into the opening at the end of the arm body 11 is formed on the end surface 12a. ing. Each of the end members 12 is formed with a mounting circular hole 12c, and the arm member 10 is connected to the vehicle body side and the wheel side through the circular holes 12c of the two end members 12. Here, the outer surface of the end member 12 from the tip of the end member 12 in the longitudinal direction of the arm member 10 to the vicinity just beside the circular hole 12c is a semi-cylindrical surface coaxial with the circular hole 12c, and is just beside the circular hole 12c. End surface 12a of end member 12 from nearby
The outer surface up to is a t-flat surface. The end member 12 can be made of a thermosetting resin such as nylon reinforced with short glass fibers.
端部材用外被層１３は全周にわたって内層１３ａと外層
１ｂとからなっている１、内層１３ａは、例えば炭素繊
維やアラミド繊維等のような比較的線膨張係数の小さい
補強繊維とエポキシ樹脂等の熱硬化性樹脂とで形成され
ており、外層１３ｂは例えばガラス繊維やナイロン繊維
等のような比較的線膨張係数の大きい補強繊維とエポキ
シ樹脂等の熱硬化性樹脂とで形成されている。The outer covering layer 13 for end members consists of an inner layer 13a and an outer layer 1b over the entire circumference 1. The inner layer 13a is made of reinforcing fibers with a relatively small coefficient of linear expansion, such as carbon fibers or aramid fibers, and epoxy resin, etc. The outer layer 13b is made of a reinforcing fiber having a relatively large coefficient of linear expansion, such as glass fiber or nylon fiber, and a thermosetting resin, such as an epoxy resin.
耐引張用外被層１３の内層Ｉ Ｊ ａは例えばフィラメ
ントワインディング法により補強繊維がアーム本体１１
の長平方向に配向するようにアーム本体１１と端部材１
２との組立体の周囲に形成され、次いで、外層１３ｂが
同様の方法で内層１３ａの周囲に形成される。The inner layer IJa of the tensile-resistant outer covering layer 13 is made of reinforcing fibers formed on the arm body 11 by, for example, a filament winding method.
The arm body 11 and the end member 1 are oriented in the longitudinal direction of the arm body 11 and the end member 1.
The outer layer 13b is then formed around the inner layer 13a in a similar manner.
その後、内層１３及び外層１３ｂを硬化させるために、
同装置３ａ及び外被層１３ｂを同時に例えば１２０〜１
３０°Ｃの温度に加熱し、その後室温まで冷却する。こ
のとき、内層１３ａ及び外層１３ｂの補強繊維の線膨張
係数の相違により、内層１３ａには圧縮残留ひずみが生
じ、外層１３ｂには引張残留ひずみが生じる。例えば、
内層１３ａの補強繊維を炭素繊維とし、外層１３ｂの補
強繊維をガラス繊維とした場合には、炭素繊維のひずみ
社が約−１〜−２ＸＩＯ−’であり、ガラス繊維のひず
み暇が約１２Ｘ１０−’であるため、内層１３ａ及び外
層１３ｂの硬化によって、同装置３ａには約１３００〜
１４００Ｘ １０−’の残留圧縮ひずみを生じさせるこ
とができ、外層１３ｂには同量の残留ひずみを生じさせ
ることができる。After that, in order to harden the inner layer 13 and outer layer 13b,
For example, the device 3a and the outer coating layer 13b are
Heat to a temperature of 30°C and then cool to room temperature. At this time, due to the difference in linear expansion coefficients of the reinforcing fibers of the inner layer 13a and the outer layer 13b, a compressive residual strain is generated in the inner layer 13a, and a tensile residual strain is generated in the outer layer 13b. for example,
When the reinforcing fibers of the inner layer 13a are carbon fibers and the reinforcing fibers of the outer layer 13b are glass fibers, the strain time of the carbon fibers is about -1 to -2XIO-', and the strain time of the glass fibers is about 12X10-'. ' Therefore, by curing the inner layer 13a and the outer layer 13b, the device 3a has a
A residual compressive strain of 1400X 10-' can be created, and the same amount of residual strain can be created in the outer layer 13b.
これらの残留ひずみにより、２つの端部材１２間にひず
み荷重が加わったときに円孔１２ｃの真横付近の耐引張
用外被層１３の内層１３ａに生じる引張応力及び外層１
３ｂに生じる圧縮応力を緩和させることができるので、
Ｆ ＲＰ外シートアーム部材の疲労強度が高まり、疲労
寿命が増大することとなる。Due to these residual strains, when a strain load is applied between the two end members 12, the tensile stress generated in the inner layer 13a of the tensile-resistant outer covering layer 13 and the outer layer 1 in the vicinity of the right side of the circular hole 12c.
Since the compressive stress generated in 3b can be alleviated,
This increases the fatigue strength of the FRP outer seat arm member and increases its fatigue life.
以上、一実施例につき説明したが、本発明は上記実施例
の態様にのみ限定されるものではない。Although one embodiment has been described above, the present invention is not limited only to the aspect of the above embodiment.
例えば、耐引張用外被層１３の同装置、 ３ ａ及び外
層１３ｂは補強繊維のプリプレグシーをアーム本体１１
と端部材１２との組立体の周囲に巻回させることにより
形成してもよい。また、引張荷重による円孔１２ｃの楕
円変形に起因した耐引張用外被層１３の応力集中は円孔
１２ｃの真横付近で起こるので、耐引張用外被層１３の
内Ｍｌ ３ ａを炭素繊維やアラミド繊維等の補強繊維
のプリプレグシート片により形成して円孔１２ｃの真横
付近の端部材１２の外側面上にのみ局部的に形成し、そ
の周囲に耐引張用外被層１３の外層を全周に渡って形成
するようにしてもよい。For example, the same device 3a and the outer layer 13b of the tensile-resistant outer covering layer 13 are made of reinforcing fiber prepregsy.
The end member 12 may be formed by wrapping the end member 12 around the assembly. In addition, since stress concentration in the tensile-resistant outer covering layer 13 due to elliptical deformation of the circular hole 12c due to a tensile load occurs near the immediate side of the circular hole 12c, Ml 3 a in the tensile-resistant outer covering layer 13 is made of carbon fiber. It is formed from a prepreg sheet piece of reinforcing fiber such as or aramid fiber, and is locally formed only on the outer surface of the end member 12 in the vicinity of the right side of the circular hole 12c, and the outer layer of the tensile-resistant outer covering layer 13 is formed around it. It may be formed over the entire circumference.
更に、第５図に示すように、アーム本体１１の両側面と
耐引張用外被層１３の内面との間や端部材１２の少なく
とも円孔１２ｃの真横付近の外側面と耐引張用外被層１
３の内面との間にはそれぞれ弾性ないし粘弾性に富む弾
性樹脂層１４．１５を形成してもよい。なお、第５図に
示す実施例における耐引張用外被層１３は−Ｌ記図示実
施例と同様の構成をａする内層１３ａ及び外層＋３ｂか
らなっている。Further, as shown in FIG. 5, there is a gap between both side surfaces of the arm body 11 and the inner surface of the tensile-resistant outer covering layer 13, and between the outer surface of the end member 12 at least in the vicinity of the circular hole 12c and the tensile-resistant outer covering layer. layer 1
Elastic resin layers 14 and 15 having high elasticity or viscoelasticity may be formed between each of the inner surfaces of 3 and 3. The tensile-resistant outer covering layer 13 in the embodiment shown in FIG. 5 consists of an inner layer 13a and an outer layer +3b having the same structure as in the illustrated embodiment indicated by -L.
弾性樹脂層１４．１５としては弾性に富むポリエチレン
、ポリプロピレン、ポリウレタン等又は粘弾性に富むエ
ポキシ樹脂等のシートを用いることができる。或いは、
耐引張用外被層１３を形成するｄ５ｊに、弾性ないし粘
弾性に富む液状の樹脂をアーム本体ｌ及び耐引張１２の
外面に塗布しておくことにより、弾性樹脂層１４．１５
を形成することができる。端部材１２の外側面と耐引張
用外被層１３との間の弾性樹脂層１５は図示するように
端部材１２の外側面全体にわたり形成してもよいが、円
孔１２ｃのへ横付近の領域に局所的に形成してもよい。As the elastic resin layer 14, 15, a sheet of polyethylene, polypropylene, polyurethane, etc., which is rich in elasticity, or a sheet of epoxy resin, etc., which is rich in viscoelasticity, can be used. Or,
By applying a liquid resin rich in elasticity or viscoelasticity to the outer surface of the arm body l and the tensile resistance layer 12, which forms the tensile resistance outer covering layer 13, the elastic resin layer 14.15 is formed.
can be formed. The elastic resin layer 15 between the outer surface of the end member 12 and the tensile-resistant outer covering layer 13 may be formed over the entire outer surface of the end member 12 as shown in the figure, It may also be formed locally in the area.
アーム本体１１の両側面と耐引張用外被層１３の内面と
の間に弾性ないし粘弾性を有する弾性樹脂層１を介在さ
せた場合には、アーム本体１１と耐引張用外被層１３と
の間でその樹脂層Ｉ４が振動を吸収することになるので
、アーム部材ＩＯの振動減衰能力が向上する。また、ア
ーム本体Ｉｔと耐引張用外被層１３との間の層間剥離を
防ＩＦすることができる。When the elastic resin layer 1 having elasticity or viscoelasticity is interposed between both side surfaces of the arm body 11 and the inner surface of the tensile-resistant outer covering layer 13, the arm main body 11 and the tensile-resistant outer covering layer 13 are Since the resin layer I4 absorbs vibrations between the arms, the vibration damping ability of the arm member IO is improved. Furthermore, delamination between the arm body It and the tensile-resistant outer covering layer 13 can be prevented.
一方、端部材１２の外側面と耐引張用外被層１３の内面
との間に弾性ないし粘弾性を有する弾性樹脂層１５を介
在させた場合には、その弾性樹脂層１５が端部材１２と
耐引張用外被層１３との間でひずみを吸収することがで
きるので、アーム部材ＩＯに加わる引張荷重による曲げ
モーメントは強さが春分された状態で端部材１２と耐引
張用外被層１３との別々に作用することとなる。したが
って、円孔１２ｃの真横付近では、端部材１２内と耐引
張用外被層１３内とに、夫々、曲げ応力が分散されて生
じることとなるので、端部材１２及び耐引張用外被層Ｉ
４の内部に生じる応力を緩和させることができる。した
がって、アーム部材の疲労寿命を一層増大させることが
できる。On the other hand, when an elastic resin layer 15 having elasticity or viscoelasticity is interposed between the outer surface of the end member 12 and the inner surface of the tensile-resistant outer covering layer 13, the elastic resin layer 15 is connected to the end member 12. Since strain can be absorbed between the end member 12 and the tensile-resistant outer covering layer 13, the bending moment due to the tensile load applied to the arm member IO can be applied to the end member 12 and the tensile-resistant outer covering layer 13 in a state where the strength is equalized. It will act separately from the Therefore, in the vicinity of the circular hole 12c, the bending stress is distributed and generated within the end member 12 and the tensile-resistant outer covering layer 13, respectively. I
It is possible to alleviate the stress generated inside 4. Therefore, the fatigue life of the arm member can be further increased.
第５図に示すように、本発明における端部材１２は、円
筒管状に形成されていてもよい。この場合、アーム本体
１１の両端面を半円筒面状に形成して端部材１２を嵌合
させることができる。また、アーム本体１１はＩ形の断
面形状を有するものであってもよい。As shown in FIG. 5, the end member 12 in the present invention may be formed into a cylindrical tube shape. In this case, both end surfaces of the arm body 11 can be formed into semi-cylindrical shapes, and the end members 12 can be fitted therein. Further, the arm main body 11 may have an I-shaped cross section.
更に、本発明によるＦＲＰ製アーム部材はサスペンショ
ンアーム以外の自動車用車両部品にも適用することがで
きる。Furthermore, the FRP arm member according to the present invention can be applied to automobile parts other than suspension arms.
（発明の効果）
以上の説明から明らかなように、本発明によれば、少な
くとも円孔の真横付近の領域におけるＩ：′ＲＰ′！Ｉ
Ｊの耐引張用外被層が内装と該内装の補強繊維よりも線
膨張係数の大きい補強繊維を有する外層とにより形成さ
れるので、耐引張用外被層の内装及び外層を加熱硬化さ
せたときに、両者の線膨張係の差により、耐引張用外被
層の内装側には圧縮残留ひずみを生じさせることができ
、また、耐引張用外被層の外層側には引張残留ひずみを
生じさせることができる。したがって、これらの残留ひ
ずみにより、２つの端部材間に引張荷重が加わったとき
に円孔の真横付近の耐引張用外被層の内側面側に生じる
引張応力及び耐引張用外被層の外側面に生じる圧縮応力
を緩和させることができるので、ＦＲＰ製アーム部材の
疲労強度を高めてその疲労寿命を増大させることができ
ることとなる。(Effects of the Invention) As is clear from the above description, according to the present invention, I:'RP'! at least in the area immediately adjacent to the circular hole! I
Since the tensile-resistant outer covering layer of J is formed of an inner layer and an outer layer having reinforcing fibers with a larger coefficient of linear expansion than the reinforcing fibers of the inner layer, the inner and outer layers of the tensile-resistant outer covering layer were heat-cured. Sometimes, due to the difference in linear expansion coefficient between the two, compressive residual strain can be generated on the inner side of the tensile resistant outer layer, and tensile residual strain can be generated on the outer layer side of the tensile resistant outer layer. can be caused. Therefore, due to these residual strains, when a tensile load is applied between the two end members, the tensile stress generated on the inner side of the tensile-resistant outer covering layer near the right side of the circular hole and the outer side of the tensile-resistant outer covering layer are Since the compressive stress generated on the side surface can be alleviated, the fatigue strength of the FRP arm member can be increased and its fatigue life can be increased.
第１図は本発明の一実施例を示すＦＲＰ製アーム部材の
正面図。
第２図は第１図に示すアーム部材の製造途中の分解斜視
図。
第３図は第１図に示すアーム部材の斜視図。
第４図は第１図に示すアーム部材の第１図中＋Ｖ−ＩＶ
線に沿った断面図。
第５図は本発明の耐引張の実施例を示すＦＲＰ製アーム
部材の正面図。
第６図は従来のＦ ＲＰ製アーム部材の構造を示す斜視
図。
第７図は第６図に示すアーム部材の曲げ応力発生状態を
示す正面図。
１０ ： ＦＲＰ製アーム部材
１１：アーム本体
１２ ： Ｑ部材
１００二円孔
１３二耐引張用外被層FIG. 1 is a front view of an FRP arm member showing an embodiment of the present invention. FIG. 2 is an exploded perspective view of the arm member shown in FIG. 1 during manufacture. FIG. 3 is a perspective view of the arm member shown in FIG. 1. Figure 4 shows +V-IV in Figure 1 of the arm member shown in Figure 1.
A cross-sectional view along the line. FIG. 5 is a front view of an FRP arm member showing a tensile-resistant embodiment of the present invention. FIG. 6 is a perspective view showing the structure of a conventional FRP arm member. FIG. 7 is a front view showing a state in which bending stress is generated in the arm member shown in FIG. 6; 10: FRP arm member 11: Arm body 12: Q member 100, two circular holes 13, two tensile-resistant outer covering layers
Claims (1)
取付用円孔を有する端部材を組み付け、アーム本体の両
側面及び端部材の外側面の周囲にＦＲＰ製の耐引張用外
被層を形成したＦＲＰ製のアーム部材において、 少なくとも円孔の真横付近の領域における耐引張用外被
層を、内装と、該内装の補強繊維よりも線膨張係数の大
きい補強繊維を有する外層とにより形成した、 ことを特徴とするＦＲＰ製アーム部材。(1) End members each having a circular mounting hole are assembled to both longitudinal ends of the FRP arm body, and a tensile-resistant outer covering layer made of FRP is formed around both sides of the arm body and the outer surface of the end member. In the FRP arm member, the tensile-resistant outer covering layer at least in the area immediately adjacent to the circular hole is formed of an inner layer and an outer layer having reinforcing fibers having a larger coefficient of linear expansion than reinforcing fibers of the inner layer. An FRP arm member characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63040618A JPH01215533A (en) | 1988-02-25 | 1988-02-25 | Arm member made of frp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63040618A JPH01215533A (en) | 1988-02-25 | 1988-02-25 | Arm member made of frp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01215533A true JPH01215533A (en) | 1989-08-29 |
Family
ID=12585517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63040618A Pending JPH01215533A (en) | 1988-02-25 | 1988-02-25 | Arm member made of frp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01215533A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05329946A (en) * | 1991-02-13 | 1993-12-14 | Toshiba Corp | Fiber reinforced plastic material |
| JPH10109511A (en) * | 1996-10-05 | 1998-04-28 | Toho Rayon Co Ltd | Suspension arm and its manufacture |
| JP2001515995A (en) * | 1997-08-13 | 2001-09-25 | マックリーン−フォグ カンパニー | Compound link |
| JP2004510615A (en) * | 2000-04-07 | 2004-04-08 | マックリーン−フォグ カンパニー | Compound link |
| JP2016159873A (en) * | 2015-03-05 | 2016-09-05 | 日産自動車株式会社 | Assembly member |
| DE102016002856A1 (en) | 2015-03-19 | 2016-11-17 | Sumitomo Riko Company Limited | Process for producing a resin molded article and resin molded article |
| CN110370686A (en) * | 2019-08-13 | 2019-10-25 | 核工业第八研究所 | A kind of double composite material enhancing ring manufacture crafts |
| JP2020070004A (en) * | 2018-10-29 | 2020-05-07 | 明安國際企業股▲分▼有限公司 | Member of linkage for steering device of motorbike, and method of manufacturing the same |
-
1988
- 1988-02-25 JP JP63040618A patent/JPH01215533A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05329946A (en) * | 1991-02-13 | 1993-12-14 | Toshiba Corp | Fiber reinforced plastic material |
| JPH10109511A (en) * | 1996-10-05 | 1998-04-28 | Toho Rayon Co Ltd | Suspension arm and its manufacture |
| JP2001515995A (en) * | 1997-08-13 | 2001-09-25 | マックリーン−フォグ カンパニー | Compound link |
| JP2004510615A (en) * | 2000-04-07 | 2004-04-08 | マックリーン−フォグ カンパニー | Compound link |
| JP2016159873A (en) * | 2015-03-05 | 2016-09-05 | 日産自動車株式会社 | Assembly member |
| DE102016002856A1 (en) | 2015-03-19 | 2016-11-17 | Sumitomo Riko Company Limited | Process for producing a resin molded article and resin molded article |
| US10654227B2 (en) | 2015-03-19 | 2020-05-19 | Sumitomo Riko Company Limited | Method of manufacturing resin molded article and resin molded article |
| JP2020070004A (en) * | 2018-10-29 | 2020-05-07 | 明安國際企業股▲分▼有限公司 | Member of linkage for steering device of motorbike, and method of manufacturing the same |
| CN110370686A (en) * | 2019-08-13 | 2019-10-25 | 核工业第八研究所 | A kind of double composite material enhancing ring manufacture crafts |
| CN110370686B (en) * | 2019-08-13 | 2021-03-12 | 核工业第八研究所 | Manufacturing process of double-composite material reinforced ring |
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