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当前位置: 首页 > 文章 > J积分移动理论的单边径向裂纹轴校直行程算法 农业机械学报 2008,39 (8) 169-172
Position: Home > Articles > Straightening Stroke Algorithm of Shaft with Single-edged Crack Based on J-integral Moving Theory Transactions of the Chinese Society for Agricultural Machinery 2008,39 (8) 169-172

J积分移动理论的单边径向裂纹轴校直行程算法

作  者：
翟华
单  位：
合肥工业大学机械与汽车工程学院
关键词：
轴;校直;裂纹;算法
摘  要：
依据弹塑性断裂理论和实验,研究了含裂纹轴中最危险的单边径向裂纹轴校直过程,提出了多步加载条件下的J积分移动理论和单边径向裂纹轴校直行程递推算法。含单边径向裂纹轴校直中,假设多步加载相互独立,J积分包括Je和Jp两项,微小递增的弹塑性载荷导致裂纹钝化有助于JIC增加,J积分值在多次加载中可缓慢向上移动。基于这一观点,结合校直行程递推算法,建立了单边径向裂纹轴的多步校直行程递推算法。对裂纹为3mm的单边径向裂纹轴实验的结果表明了JIC移动现象,并且在对实验轴4步校直后,初始0.13mm弯曲值可以减少到0.01mm,而裂纹嘴张开位移限制在0.008mm。
译  名：
Straightening Stroke Algorithm of Shaft with Single-edged Crack Based on J-integral Moving Theory
作  者：
Zhai Hua(Hefei University of Technology, Hefei 230009, China)
关键词：
Shafts, Straightening, Crack, Algorithm
摘  要：
The J-integral moving theory with multiple loading and shaft straightening stroke increasing algorithm with single-edged crack were presented according to the elastic-plastic fracture mechanic theory and experiments analysis. During multi-step straightening, with the assumption of independent multiple loading, J-integral including two items of Je and Jp, and the crack blunting would promote the JIC increasing, the J-integral could be considered to move up slowly. Based on this view, the multi-step straightening stroke algorithm was built up to the shaft with single-edged crack. The straightening experiment resulted to the shaft with 3 mm depth single-edged crack could prove the JIC moving phenomenon, and after 4 steps straightening to the experimented shaft, the initial 0.13 mm bend value could be decreased to 0.01 mm, while crack mouth opening displacement could be limited to 0.008 mm.

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