ELASTIC-PLASTIC FINITE ELEMENT ANALYSIS OF FATIGUE CRACK TIP PLASTICITY AND CORRELATION OF FATIGUE CRACK PROPAGATION RATES UNDER TENSION-COMPRESSION LOADING

机译：拉伸-压缩载荷下疲劳裂纹尖端塑性的弹塑性有限元分析及疲劳裂纹扩展速率的相关性

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Elastic-plastic finite element analysis has been performed in order to obtain the fatigue crack tip parameters under tension-compression loading. The crack tip plastic zone size, reverse plastic zone size, crack tip opening displacement have been obtained. These results show that the compressive loading part of the fatigue load cycle has a significant effect on these crack tip parameters and therefore has a strong effect on fatigue crack growth rate under tensioncompression loading. The obtained parameters from finite element analysis have been used to correlate the experimental obtained fatigue crack propagation rate, and good agreement has been obtained.

机译：为了获得在拉压载荷下的疲劳裂纹尖端参数，已经进行了弹塑性有限元分析。获得了裂纹尖端塑性区大小，反向塑性区大小，裂纹尖端开口位移。这些结果表明，疲劳载荷循环的压缩载荷部分对这些裂纹尖端参数具有显着影响，因此，在拉伸压缩载荷下，对疲劳裂纹扩展速率具有很强的影响。从有限元分析获得的参数已用于关联实验获得的疲劳裂纹扩展速率，并已取得良好的一致性。

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《International Conference on Engineering Structural Integrity Assessment》|2007年|1-4|共4页
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Lü Ling; Xia Xiao-lan; Li Yan; Zhang Chao;
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ELASTIC-PLASTIC FINITE ELEMENT ANALYSIS OF FATIGUE CRACK TIP PLASTICITY AND CORRELATION OF FATIGUE CRACK PROPAGATION RATES UNDER TENSION-COMPRESSION LOADING

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