Torsional fatigue properties of engineering plastics. On polyacetal, polycarbonate and epoxy resin.
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- YAMAGUCHI Yukisaburo
- Faculty of Engineering, Kogakuin University
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- SATO Sadao
- Faculty of Engineering, Kogakuin University
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- HAMAMOTO Junichi
- Faculty of Engineering, Kogakuin University
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- HASHIMOTO Kazuyuki
- Faculty of Engineering, Kogakuin University
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- KOHYAMA Yoshiaki
- Faculty of Engineering, Kogakuin University
Bibliographic Information
- Other Title
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- プラスチック材料のねじり疲労に関する研究 ポリアセタール,ポリカーボネートおよびエポキシ樹脂について
- プラスチック ザイリョウ ノ ネジリ ヒロウ ニ カンスル ケンキュウ ポリア
- On Polyacetal, Polycarbonate and Epoxy Resin
- ポリアセタール,ポリカーボネートおよびエポキシ樹脂について
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Abstract
In general, the studies of fatigue property of plastics have been carried out experimentally by rotary bending or plane bending fatigue tests and tension-compression fatigue tests in the axial direction, but hardly by torsional fatigue tests. In this article, the torsional fatigue properties of various engineering plastics (POM, PC and Epoxy resin) were investigated experimentally, and were compared with those by the rotary and bending fatigue tests.<br>The results obtained are as follows:<br>(1) The torsional fatigue failure of POM and PC, in which the static tensile strength σt is larger than the shear strength τ0, occurred by shearing stress in the first stage before the transition point B, at which the fracture mode changes from shearing to tension, and by tensile stress in the latter stage after the point B, whereas the Epoxy resin was always broken by tensile stress because its tensile strength is smaller than the shear strength. Therefore, there is no transition point B in the Sa-N curve of the Epoxy resin.<br>(2) The torsional fatigue strength τf of POM, PC and Epoxy resin were 2.3, 0.9 and 1.7kgf/mm2, respectively, and the torsional fatigue strength ratios α(=τf/σt) became 0.34, 0.14 and 0.34, respectively, and the another ratios γ(=τt/τ0) become 0.38, 0.15 and 0.24, respectively.<br>(3) The torsional fatigue strength of POM and PC were nearly equal to that of the plane bending, but were about 25-30% smaller than that of the rotary bending, and the torsional fatigue and rotary bending fatigue strengths of the Epoxy resin were quantitatively nearly equal.
Journal
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- Journal of the Society of Materials Science, Japan
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Journal of the Society of Materials Science, Japan 36 (401), 153-159, 1987
The Society of Materials Science, Japan
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Details 詳細情報について
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- CRID
- 1390282680368766976
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- NII Article ID
- 110002297016
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- NII Book ID
- AN00096175
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- COI
- 1:CAS:528:DyaL2sXhslOgtLk%3D
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- ISSN
- 18807488
- 05145163
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- NDL BIB ID
- 3132434
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed