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lidongze(½ð±Ò+13, ·ÒëEPI+1): 2011-01-20 18:01:21
The fatigue crack propagation threshold seems to be defined by the condition that the cyclic plastic zone at the crack tip is of the order of grain size , and the influence of the mean stress seems to be defined by the maximum stress intensity factor (Kmax) through its influence on crack closure behaviour, the crack-tip blunting phenomenon, the crack-tip environment and the monotonic plastic zone. Æ£ÀÍÁÑÎÆÀ©Õ¹ãÐÖµ¿ÉÄÜÊÜÔÚ¾ßÓÐÎÆÀí³ß´ç˳ÐòµÄÁÑÎÆ¼â¶ËµÄÑ»·ËÜÐÔÇøµÄÌõ¼þÏÞÖÆ£¬Æ½¾ùÓ¦Á¦µÄÓ°Ïì¿ÉÄܱ»×î´óÓ¦Á¦Ç¿¶ÈÒò×Ó£¨Kmax£©Í¨¹ýËü¶ÔÁÑÎÆ±ÕºÏÐÐΪ£¬ÁÑÎÆ¼â¶Ë¶Û»¯ÏÖÏó£¬ÁÑÎÆ¼â¶ËµÄ»·¾³ºÍµ¥µ÷µÄËÜÐÔÇøµÄÓ°Ïì¶øÊܵ½ÏÞÖÆ¡£
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