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Other TitleAxial fatigue strength of open-hole specimens of T800H/PMR-15 carbon/polyimide composite at room and high temperatures
Author(jpn)角田 義秋; 下河 利行; 谷本 敏夫; 森重 純一
Author(eng)Kakuta, Yoshiaki; Shimokawa, Toshiyuki; Tanimoto, Toshio; Morishige, Junichi
Author Affiliation(jpn)宇宙航空研究開発機構 総合技術研究本部; 東京都立科学技術大学; 湘南工科大学; 湘南工科大学
Author Affiliation(eng)Japan Aerospace Exploration Agency Institute of Space Technology and Aeronautics; Tokyo Metropolitan Institute of Technology; Shonan Institute of Technology; Shonan Institute of Technology
Issue Date2004-03-25
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication date2004-03-25
AbstractThe objective of this study is to evaluate the fatigue strength of a T800H/PMR-15 carbon/polyimide composite material at room and high temperatures. Using open-hole specimens of a laminate with a quasi-isotropic stacking sequence, 32 plies [+ 45 deg/0 deg/- 45 deg/90 deg]4S, axial fatigue tests were conducted at room temperature and 260 C. The stress ratios (R = minimum stress/maximum stress) were 0.1 (tension-tension), 10 (compression-compression), and -1 (fully reversed). Fatigue tests provided the results of S-N relationships at room temperature and 260 C, and fatigue failure modes. This study discusses the effect of temperature on fatigue strength, the coefficient of variation of fatigue strength as an index of fatigue scatter, and fatigue failure modes.
本研究の目的は、カーボン/ポリイミド(T800H/PMR-15)複合材料の高温疲労強度を評価することである。疲労試験は、擬似等方積層材の有孔試験片を用い、室温および高温(260度C)環境下で行った。負荷荷重は、応力比(R=最小応力/最大応力)としてR=0.1(引張疲労)、R=10(圧縮疲労)、およびR=-1(両振り疲労)の3種類とした。各応力比に対応した試験片は、疲労試験後に破壊の様子を観察した。温度の影響については、S-N線図における10(exp 5)サイクルの時間強度で疲労強度を評価した。
DescriptionJAXA Research and Development Report
Keywordscarbon/polyimide composite; fatigue test; open-hole specimen; laminate; fatigue strength; stress ratio; residual stress; tensile strength; カーボン・ポリイミド複合材料; 疲労試験; 有孔試験片; ラミネート; 疲労強度; 比応力; 残留応力; 引張り強度
Document TypeTechnical Report
JAXA Category研究開発報告
Report NoJAXA-RR-03-015

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