국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Fatigue Strength of Open Hole Specimens of a T800H/PMR-15 Carbon/Polyimide Composite
저자	Yasumasa HAMAGUCHI, Toshiyuki SHIMOKAWA
Keyword	Static Strength; Fatigue Strength; Residual Strength; PMR-15; Carbon/Polyimide composite
URL	http://send.nal.go.jp/send/jpn/dlpdf.php3/naltr0001392.pdf?id=NALTR0001392
보고서번호	NAL TR-1392
발행년도	1999.11
출처	NAL (National Aerospace Laboratory of Japan)
ABSTRACT	The objective of this study is to investigate the fatigue properties of a T800H/PMR-15 carbon/polyimide composite, selected as a candidate material for the primary structure of the unmanned space reentry vehicle HOPE-X (H-II rocket Orbiting Plane Experimental). Both static and fatigue tests were conducted to obtain data on the mechanical properties for open-hole specimens of a quasi-isotropic laminate. These tests were conducted at room temperature. The static test investigated static compression strength and static tensile strength, and the relationship between open-hole deformation and load was also examined. The fatigue test investigated S-N relationships for stress ratios R=0.1,R=－infinity and R=－1, and the residual strength of the non-failure specimens. The fatigue damage process arising from the relationship between number of cycles and open-hole deformation was also investigated. The results of analysis and evaluation of the strength characteristic obtained from these tests is reported.