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动载荷作用下的弹塑性微弯裂纹J积分

On J Integral of Slightly Curved Elastic-Plastic Crack under Dynamic Loads
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摘要 主要研究动载荷作用下的弹塑性弯曲裂纹尖端的J积分问题.综合考虑动态作用应力,塑性区域边界上动态正应力与动态剪应力,利用二阶摄动方法与卡氏定理计算弯曲裂纹尖端的动态J积分.研究在不同的动态载荷条件下弹塑性弯曲裂纹尖端J积分随着弯曲裂纹形状参数的变化而变化的规律. J Integral of elastic - plastic curved crack under dynamic load is discussed. We compute dynamic J Integral of curved crack by means of a second order perturbation method and KA theorem with a comprehensive consideration of the effects of dynamic stresses, normal and shear stresses on the boundaries of plastic area. A regular pattern of parameter variations of dynamic J Integral of elastic - plastic curved crack along with the variations of curved crack parameters under different dynamic loads has been studied.
作者 吴凤珍 杨大鹏
机构地区 郑州职业技术学院基础教育处 郑州职业技术学院机械工程系
出处 《西安文理学院学报（自然科学版）》 2012年第4期64-67,共4页 Journal of Xi’an University(Natural Science Edition)
关键词 弯曲裂纹 二阶摄动方法 动态J积分 curved crack a second order perturbation solution dynamic J Integral
分类号 O346.1 [理学—固体力学]
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参考文献20

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二级参考文献41

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共引文献16

西安文理学院学报（自然科学版）
2012年 第4期

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