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METHOD FOR PREDICTING FATIGUE CRACKINITIATION LIFE OF ELEMENTS SUBJECTED TOCEH UNDER VARIABLE-AMPLITUDE LOADING |
LING Chao;ZHANG Baofa;ZHENG Xiulin Northwestern Polytechnical University; Xi'an |
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Cite this article:
LING Chao;ZHANG Baofa;ZHENG Xiulin Northwestern Polytechnical University; Xi'an. METHOD FOR PREDICTING FATIGUE CRACKINITIATION LIFE OF ELEMENTS SUBJECTED TOCEH UNDER VARIABLE-AMPLITUDE LOADING. Acta Metall Sin, 1991, 27(1): 75-77.
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Abstract Experimental study has been carried out on the effects of the com-plex strengthening of the cold expansion of hole (CEH) and overloading on the fa-tigue crack initiation life (FCIL) of LY12CZ alloy The overloading has noappreciable effect on FCIL of LY12CZ alloy after CEH. Moreover, an expressionfor FCIL of LY12CZ alloy subjected to the complex strengthening is given. Basedon the above-mentioned results, a new method is put forward to predict theFCIL of LY12CZ alloy after CEH under variable amplitude loading and has beensubstantiated by the fatigue tests under a flight-to-flight spectrum.
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Received: 18 January 1991
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1 Chang J B. J Aircr, 1977; 14: 903 2 Armen H. Levy A, Eidinoff H L. J Aircr. 1984; 21: 193 3 凌超,郑修麟,航空学报待发表 4 Zheng Xiulin, Ling Chao. Eng Fract Mech, 1988; 31: 959 5 Zheng Xiulin. Int J Fatigue, 1986; 8(1) : 17 6 郑修麟,陈德广,凌超.西北工业大学学报,1990;8:199 7 张保法,郑修麟.国防科技报告待发表 8 Buch A. Int J Fatigue, 1989; 11(2) : 9 |
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