| 多维应力状态下裂纹扩展规律研究 |
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| 引用本文： | 王正. 多维应力状态下裂纹扩展规律研究[J]. 辽宁石油化工大学学报, 1995, 0(3) |
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| 作者姓名： | 王正 |
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| 摘 要： | 通过对具有预裂纹的圆柱形带缺口试件的高温低周疲劳试验，并借助于带有非硬化区的双曲面模型程序，进行了轴对称问题的循环应力、应变计算。研究表明三维应力状态下，裂纹扩展速率ｄａ／ｄＮ可用当量Ｊ积分范围ΔＪｅｑ及当量应变能密度ΔＷｅｑ进行表征。
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| 关 键 词： | 疲劳；裂纹扩展；速率／当量J积分范围ΔJeq；当量应变能密度ΔWe |
Study of Regular Expansion of Fatigue Crack Expansion Under Complicated Stress |
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| Wang Zheng. Study of Regular Expansion of Fatigue Crack Expansion Under Complicated Stress[J]. Journal of Liaoning University of Petroleum & Chemical Technology, 1995, 0(3) |
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| Authors: | Wang Zheng |
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| Affiliation: | Department of Mechanical Engineering |
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| Abstract: | A high-temperature low cycle fatigue experiment is conducted on a cylindrical specimen with preexisting crack at the notch root, and the cyclic strain and stress of axial symmetry is calculated by means of the program of two surface′s model within on-harden range. The result shows that the crack propagation rate d a /d N can be characterized by equivalent J -inteqral range Δ Jeq and equivalent strain energy density Δ equnder threedimensional stress. |
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| Keywords: | Fatigue Crack propagation Rates/Equivalent J =integral range Δ J eq Equivalent strain energy density Δ eq |
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