疲劳裂纹扩展、合并规律试验研究

The Experimental Investigation on the Regulation of Fatigue Crack s'Growing and Merging

为研究两裂纹合并规律 ,验证裂纹合并准则 ,本文设计了裂纹扩展、合并试验的试验方案及有关试件 ,研究具有不同相对位置的的裂纹合并规律。试验结果表明 :裂纹的合并形式与两裂纹的侧面距离有关 ;

Aiming at investigating and verifying the regu lation of two cracks' merging, both the experimental scheme and species were des igned. The merging rule of two cracks with different relative positions was stud ied. The results show that the form of merge was affected by the space between t wo cracks, and different merge rules should be adopted for the cracks with diffe rent top location.