JPH0238945A - Method of inspecting fatigue fracture of fiber reinforced composite material structure - Google Patents
Method of inspecting fatigue fracture of fiber reinforced composite material structureInfo
- Publication number
- JPH0238945A JPH0238945A JP19000088A JP19000088A JPH0238945A JP H0238945 A JPH0238945 A JP H0238945A JP 19000088 A JP19000088 A JP 19000088A JP 19000088 A JP19000088 A JP 19000088A JP H0238945 A JPH0238945 A JP H0238945A
- Authority
- JP
- Japan
- Prior art keywords
- fatigue
- reinforced composite
- composite material
- resistance value
- fiber
- 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
- 238000000034 method Methods 0.000 title claims description 17
- 239000000463 material Substances 0.000 title claims description 14
- 239000003733 fiber-reinforced composite Substances 0.000 title claims description 13
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910000077 silane Inorganic materials 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 11
- 238000007689 inspection Methods 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 239000002318 adhesion promoter Substances 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 239000003822 epoxy resin Substances 0.000 claims 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims 1
- 229920000647 polyepoxide Polymers 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 11
- 239000010959 steel Substances 0.000 abstract description 11
- 238000009661 fatigue test Methods 0.000 abstract description 9
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 239000003365 glass fiber Substances 0.000 abstract description 2
- 229920000728 polyester Polymers 0.000 abstract description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011208 reinforced composite material Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 1
- RTTZISZSHSCFRH-UHFFFAOYSA-N 1,3-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC(CN=C=O)=C1 RTTZISZSHSCFRH-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000013020 steam cleaning Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、繊維強化複合材料構造物の疲労破壊検査方法
に関する本のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is a book related to a fatigue fracture testing method for fiber-reinforced composite material structures.
従来、繊維強化複合材料から成る構造物の疲労破壊検査
方法としては、一般的に、構造物の表面にひずみゲージ
を貼って、構造物表面の応力変動を測定する方法と、構
造物の表面状態を目視により白化やクラックの発生を観
察する方法とがある。Conventional fatigue fracture inspection methods for structures made of fiber-reinforced composite materials generally include a method of attaching strain gauges to the surface of the structure and measuring stress fluctuations on the structure's surface, and a method of measuring the stress fluctuation on the surface of the structure. There is a method of visually observing the occurrence of whitening and cracks.
上記従来方法は、いずれも繊維強化複合材料構造物の表
面の変化しか検査で色ず、厚みを有する構造物の内部疲
労の状況を知ることができなかった。In all of the above conventional methods, only changes in the surface of the fiber-reinforced composite material structure are detected, and the state of internal fatigue of the thick structure cannot be determined.
更に、前者の方法では、表面の極部の状態しか検査でき
ず、大きな構造物の場合、多大な手数を要するという問
題点がある。Furthermore, the former method has the problem that only the condition of the extreme parts of the surface can be inspected, and in the case of a large structure, it requires a great deal of effort.
また、後者の方法では、検査者によって観察結果に大き
なバラツキが生ずるばかりか、感舵検査であるため、疲
労状況の定量化ができず、破壊の認定基準の設定があい
まいにならざるを得ないなどの問題点を有している。In addition, with the latter method, not only does the observation result vary greatly depending on the inspector, but because the inspection is conducted by sensing the steering wheel, fatigue conditions cannot be quantified, making the establishment of failure certification criteria ambiguous. It has problems such as:
本発明は、上述の従来技術の問題点を解決するためＫな
したものであり、繊維強化複合材料構造物の内部疲労を
簡単に測定でき、疲労破壊を事前に知ることができ、さ
らに疲労状況の定量化かできるようになした１１１ｆａ
強化複合材料構造物の疲労破壊検査方法を提供すること
を目的とする。The present invention has been made in order to solve the problems of the prior art described above, and it is possible to easily measure the internal fatigue of a fiber reinforced composite material structure, to know in advance of fatigue failure, and to be able to determine the fatigue status. 111fa made it possible to quantify
The purpose of this invention is to provide a fatigue fracture inspection method for reinforced composite material structures.
上記目的を達成するために、本発明の繊維強化複合材料
構造物の疲労破壊検査方法は、繊維強化複合材料から成
る構造物の内部の適所に、１乃至複数本の金属単線を、
この金属単線の両端部分が測定端子となるように配設し
、上記測定端子間の金属単線の電気抵抗値の変動を測定
するものである。In order to achieve the above object, the fatigue fracture inspection method for a fiber-reinforced composite material structure of the present invention includes one or more metal single wires placed at appropriate locations inside a structure made of fiber-reinforced composite material.
This single metal wire is arranged so that both end portions serve as measurement terminals, and the variation in the electrical resistance value of the single metal wire between the measurement terminals is measured.
また、構造物内部に配設する金属単線は、その表面にシ
クン系、有機チタン系、ウレタン樹脂系、ブチクール樹
脂系、エポ中シ樹脂系、フェノール樹脂系の接着促進剤
の１種または２種以上による被膜処理を予め施したもの
を用いることもある。In addition, the single metal wire installed inside the structure should be coated with one or two types of adhesion promoters such as Shikun, organic titanium, urethane resin, Buticool resin, Epo-silicone resin, and phenolic resin. A material that has been previously subjected to the coating treatment described above may also be used.
ところで、上記金属単線としては、スチール単線のほか
、電気抵抗が測定可能な金属線等を用いゐ屯のでああ。By the way, as the above-mentioned solid metal wire, in addition to the solid steel wire, a metal wire whose electrical resistance can be measured can be used.
構造物が繰返し応力や同期応力を受けて疲労が進行する
と、構造物に歪が生じ、歪の生じた箇所に配設された金
属単線も追随して歪が生じ、この歪の変動に応じて測定
端子間の金属単線の電気抵抗値の変動を測定でき、構造
物の内部疲労の状況を定量的に検査できる。When a structure undergoes repeated stress or synchronous stress and fatigue progresses, distortion occurs in the structure, and the metal wires installed at the locations where the distortion occurs also follow, and in response to the fluctuations in this distortion, It is possible to measure fluctuations in the electrical resistance value of a single metal wire between measurement terminals, and quantitatively inspect the internal fatigue status of a structure.
よって、構造物内部に配設した金属単線の電気抵抗値が
急激に増大した時点が、構造物の疲労破壊の直前である
と判定で睡る。Therefore, it is determined that the point in time when the electrical resistance value of the single metal wire disposed inside the structure suddenly increases is immediately before fatigue failure of the structure.
以下本発明につき、図面に基づいて説明する。 The present invention will be explained below based on the drawings.
第１図は、疲労試験片の斜視図で、疲労試験片ｆｉｌ
ｔｉガラス繊維強化ポリエステルを成形したもので、こ
の試験片の成形時に、板厚のほり中間位置に直径αＯ１
？ｆｌのスチール単線（！）を埋設し、かつスプール単
線（２ンの両端部分を露出して測定端子ｆｉｌ ｆｉ＋
となす。FIG. 1 is a perspective view of a fatigue test piece, and the fatigue test piece fil
ti Glass fiber reinforced polyester is molded, and when molding this test piece, a diameter αO1
? Bury the fl solid steel wire (!) and expose both ends of the spool solid wire (2) to connect the measuring terminal fil fi+
Nasu.
本実施例で使用したスチール単、！Ｊ ＋！＋は、直径
０．０５〜Ｑ、５ｆｆｉＩＩが好適であるか、こ九に限
定されるものではない。The steel singleton used in this example! J+! + is preferably 0.05 to Q in diameter, 5ffil, but is not limited to these.
ところで、上記スチール単線（りは、疲労試験片ｆｉｌ
の構成樹脂との接層性を向上させるため、予め以下の手
順で被膜処理を行なった。By the way, the above-mentioned single steel wire (the fatigue test piece fil
In order to improve the adhesion with the constituent resins, coating treatment was performed in advance according to the following procedure.
（Ｄ 脱脂、洗浄
偵） トリクロロエチレン蒸気洗浄 １分
（ｂ） 冷水洗浄
５分（Ｃ） 乾 燥 ４０℃ ３ｏ
分■ シランカップリング処理
・処理剤 次の混合物
ガンマ−アミノプロピルトリエトキシシラン（ＫＢＥ９
０３ 信越化学′！ＪＪ） ５部エテルアル
；−ル ９５部（ａ） 浸 漬
１０秒（ｂ）
乾燥 ８０℃ １０分
（Ｄ クレクンプクイマー処理
・処理剤 次の混合物
登録商漂タケネートＭ４０２ ５０部（武田薬品製）
トルエン ５０部（ａ３
浸 漬
１０秒Φ）乾燥 ８０℃ １０分
次に、上記疲労試験片（１）を用いて万ｎピ疲労試験機
（島津製ＶＦ−５００容１に表９窟）で以て片振り引張
疲労試験を行なった。(D Degreasing, cleaning) Trichlorethylene steam cleaning 1 minute (b) Cold water cleaning
5 minutes (C) Dry 40℃ 3o
■ Silane coupling treatment/treatment agent The following mixture gamma-aminopropyltriethoxysilane (KBE9
03 Shin-Etsu Chemical'! JJ) 5 parts ethyl alcohol 95 parts (a) Soaking
10 seconds (b)
Drying 80℃ 10 minutes (D Crekumpkuimer treatment/treatment agent The following mixture Registered trade name: Takenate M402 50 parts (manufactured by Takeda Pharmaceutical Co., Ltd.) Toluene 50 parts (A3
Soaking
10 seconds Φ) Dry at 80°C for 10 minutes Next, using the above fatigue test piece (1), perform a oscillating tensile fatigue test using a 10,000-pin fatigue tester (Shimadzu VF-500 volume 1, Table 9). I did it.
疲労試験中のスチール単＠ ｆ！ｌの抵抗値の変化を四
点法により測定し、メモソノ１イコーダに記録された波
形の−Ｍを第２図に示す。第８図中Δには抵抗値の最小
値の増加量を示し、Ｋは抵抗値の変動の振幅を示す。上
記抵抗値の最小値の増加量Δにおよび振幅蝋にの変化を
第８図に示す。縦軸には抵抗値をとったが、抵抗値の０
点は初期振幅の最小値とし、横軸には疲労回数をとった
。第３図によると、疲労寿命の９０＜以後に抵抗値の急
激な上昇が認められた。Single steel during fatigue test @f! The change in the resistance value of 1 was measured by the four-point method, and the waveform -M recorded on the memosono 1 equalizer is shown in FIG. In FIG. 8, Δ indicates the amount of increase in the minimum value of the resistance value, and K indicates the amplitude of variation in the resistance value. FIG. 8 shows the changes in the increase amount Δ of the minimum resistance value and the amplitude wax. The resistance value is plotted on the vertical axis, and the resistance value is 0.
The point is the minimum value of the initial amplitude, and the horizontal axis is the number of times of fatigue. According to FIG. 3, a rapid increase in resistance value was observed after the fatigue life of 90<.
初期振幅を１として、初期の抵抗値に対する疲労中の抵
抗値の比は、Δｄ、Ａで表わされる。Assuming that the initial amplitude is 1, the ratio of the resistance value during fatigue to the initial resistance value is expressed as Δd,A.
これを歪の比をとるために平方して、Ｐす■屡とし、初
期の歪量を１とした場合の歪量の比を第４図に示す。This is squared to obtain the strain ratio, and it is set as P square, and the strain amount ratio when the initial strain amount is 1 is shown in FIG.
第４図にみられる歪量の変化においても、第８図で示し
た抵抗値の変化同様、寿命の９０％以ＩＫ急激な上昇か
認められた。Similar to the change in resistance value shown in FIG. 8, a rapid increase in IK was observed in the change in strain shown in FIG. 4 over 90% of the life.
上記の通り測定端子間のスチール単線の電気抵抗値の測
定結果は、疲労試験片の塑性伸びに対応しており、この
電気抵抗値の変動を測定することが、構造物の内部疲労
状況を判定するのに有効であることが判明した。As mentioned above, the measurement result of the electrical resistance value of the single steel wire between the measurement terminals corresponds to the plastic elongation of the fatigue test piece, and measuring the fluctuation of this electrical resistance value determines the internal fatigue state of the structure. It was found to be effective in
次に、繊維強化複合材料製自動車用ホイールを用いて実
・車走行テストを行なった例について述べる。第５図は
、ａｍ強化複合材料製自動車用ホイール（４）に８本の
スチール単線ｆＩｌ園を配設した例を示し、（イ）は正
面図、（＝）は（イ）のＡ−入断面図である。Next, we will discuss an example of an actual car driving test using a fiber-reinforced composite material automobile wheel. Figure 5 shows an example in which eight single steel wires are arranged on an automobile wheel (4) made of am-reinforced composite material, where (a) is a front view and (=) is an A-input of (a). FIG.
上記自動軍用ホイール（４）を自動車に装着し、過負荷
状態で走行テストを実施した。この場合、スチール単ｍ
（ｓｌ （ｇｌの電気抵抗は常時測定するのが困難で
あるので、１０Ｇ−走行毎に抵抗値の変動の振幅ｔｇ、
抵抗値の最小値の増加量ΔＫをホイールを数回転させる
ことで測定した。The above-mentioned automatic military wheel (4) was mounted on a car, and a running test was conducted under overload conditions. In this case, steel single meter
(sl (Since it is difficult to constantly measure the electrical resistance of gl, the amplitude tg of the resistance value fluctuation every 10G-running,
The amount of increase ΔK in the minimum resistance value was measured by rotating the wheel several times.
この測定結果を第６図に示す。なシ、第６図において、
縦軸Ｆｉ第４図と同様 ノー６口〔Ｆｒつ７１とし、横
軸は走行距離をとった。The measurement results are shown in FIG. In Figure 6,
The vertical axis Fi is the same as in Figure 4, with 6 units and 71 units, and the horizontal axis is the distance traveled.
＠６図から明らかなように、走行距離が７００−までは
テスト開始時と比べて余り変化のない状態であったが、
８００−走行後の測定では急激な増加が見られ九ので、
テストを中上した。As is clear from Figure @6, there was not much change in the mileage up to 700- compared to the start of the test.
Measurements after 800-km run showed a rapid increase, so
I passed the test.
そして、テストホイールを検査したところ、疲労損傷が
数箇所確認された。When the test wheels were inspected, fatigue damage was found in several locations.
ところで、本発明による方法を用いるときには、繊維強
化複合材料構造物の応力負荷かかかり、内部破壊を生じ
る箇所を予め知ることができ、その用途に応じた構造物
を製造できる。By the way, when using the method according to the present invention, it is possible to know in advance the parts of the fiber-reinforced composite material structure where a stress load is applied and cause internal destruction, and a structure suitable for its use can be manufactured.
また、金属単線を配設した繊維強化複合材料で以て自動
車用ホイールのほか、薬品タンク、貯水槽、浄化槽、船
体１機体（飛行機）その他の構造物を作るときには、上
記構造物の内部疲労の状況を定期的にチエツクすること
により、疲労破壊による事故を未然に防止できる等、広
範囲に応用できる。In addition, when manufacturing automobile wheels, chemical tanks, water storage tanks, septic tanks, ship bodies (airplanes), and other structures using fiber-reinforced composite materials with single metal wires, it is important to avoid internal fatigue of the structures. By checking the status regularly, accidents due to fatigue failure can be prevented, and can be applied to a wide range of applications.
本発明によるときは、極めて簡単な方法で構造１の内部
疲労を検査でき、また疲労状況を足端的に測定でき、更
に構造物の大きさに何ら制限されることなく適用できる
等の優れた効果を奏するものである。According to the present invention, the internal fatigue of the structure 1 can be inspected using an extremely simple method, the fatigue situation can be measured at the end of the foot, and the present invention has excellent effects such as being able to be applied without any restrictions on the size of the structure. It is something that plays.
＠１図は本発明の方法に用いた試験片の斜視図、第２図
は測定記録の波形図、第８図は抵抗値と疲労回数の関係
図、第４図は歪量の比と疲労回数の関係図、第５図は本
発明の方法に用いた自動車用ホイールの例を示し、（５
）は正面図。
（ロ）は（イ）のＡ−Ａ断面図、第６図は歪量の比と走
行距離の関係図である。
ｆｉ＋・・・・・・・・・・・・ 疲労試験片（ｇｌ
＋ｌｌｌ ［６１・・・ スチール単線ｆｓ）・・・・
・・・・・・・・ 測定端子（４）・・・・・・・・・
・・・ 自動車用ホイール第
図
第
図
（イ）
（ロ）
Ａ
第
図
第
図
疲労回数
（回）
第
図
走４テ２臣貰ｔ
（Ｋｍ）@Figure 1 is a perspective view of the test piece used in the method of the present invention, Figure 2 is a waveform diagram of measurement records, Figure 8 is a relationship between resistance value and fatigue number, and Figure 4 is a relationship between strain ratio and fatigue. Figure 5 shows an example of an automobile wheel used in the method of the present invention.
) is a front view. (B) is a sectional view taken along the line A-A in (A), and FIG. 6 is a diagram showing the relationship between the ratio of strain amount and travel distance. fi+・・・・・・・・・・・・ Fatigue test piece (gl
+lll [61... Steel single wire fs)...
・・・・・・・・・ Measurement terminal (4)・・・・・・・・・
... Automobile wheel diagram (a) (b) A diagram diagram fatigue count (times) diagram run 4te2omit (Km)
Claims (2)
複数本の金属単線を、この金属単線の両端部分が測定端
子となるよう一体に配設し、上記測定端子間の金属単線
の電気抵抗値の変動を測定することを特徴とする繊維強
化複合材料構造物の疲労破壊検査方法。(1) One or more single metal wires are installed inside a structure made of fiber-reinforced composite material so that both ends of the single metal wires serve as measurement terminals, and the electricity of the single metal wire between the measurement terminals is A fatigue fracture inspection method for fiber-reinforced composite material structures, characterized by measuring fluctuations in resistance.
チタン系、ウレタン樹脂系、ブチラール樹脂系、エポキ
シ樹脂系、フェノール樹脂系の接着促進剤の１種または
２種以上による被膜処理を施したものである請求項１記
載の繊維強化複合材料構造物の疲労破壊検査方法。(2) The surface of the single metal wire is coated with one or more adhesion promoters such as silane, organic titanium, urethane resin, butyral resin, epoxy resin, and phenol resin. A method for inspecting fatigue fracture of a fiber-reinforced composite material structure according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19000088A JPH0238945A (en) | 1988-07-29 | 1988-07-29 | Method of inspecting fatigue fracture of fiber reinforced composite material structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19000088A JPH0238945A (en) | 1988-07-29 | 1988-07-29 | Method of inspecting fatigue fracture of fiber reinforced composite material structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0238945A true JPH0238945A (en) | 1990-02-08 |
Family
ID=16250714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19000088A Pending JPH0238945A (en) | 1988-07-29 | 1988-07-29 | Method of inspecting fatigue fracture of fiber reinforced composite material structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0238945A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012011718A (en) * | 2010-07-02 | 2012-01-19 | Bridgestone Corp | Method of producing resin-metal composite material, resin-metal composite material, and tire |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60114741A (en) * | 1983-11-28 | 1985-06-21 | Mazda Motor Corp | Detection for fatigue fracture of frp member |
-
1988
- 1988-07-29 JP JP19000088A patent/JPH0238945A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60114741A (en) * | 1983-11-28 | 1985-06-21 | Mazda Motor Corp | Detection for fatigue fracture of frp member |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012011718A (en) * | 2010-07-02 | 2012-01-19 | Bridgestone Corp | Method of producing resin-metal composite material, resin-metal composite material, and tire |
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