국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Experimental Results of Tensile Fatigue Strength of Cross-ply Laminated CFRP
저자	Yoshio NOGUCHI
Keyword	Composites; Carbon/epoxy; Cross-ply; laminates; Tensile test; Damege; X-ray radiography; Fatigue strength
URL	http://send.nal.go.jp/send/jpn/dlpdf.php3/naltr0001338.pdf?id=NALTR0001338
보고서번호	NAL TR-1338
발행년도	1997.10
출처	NAL (National Aerospace Laboratory of Japan)
ABSTRACT	This study evaluates the testing method for sttive crack detection method. The test results indicated that the fracture of all specimens occurred in sudden mode. The high-strength type CFRP should exhibit rupture in grip portion. The relationship between fatigue stress and number of cycles is approximately linear on a semi-logarithmic graph. After being subjected to 10７ stress cycles, the ratios of tensile fatigue strength to static tensile strength for high-strength, high-strain and high-strength/intermediate-elastic-modulus types CFRP were estimated to be 0.97, 0.85 and 0.76, respectively.