| 动载荷作用下的弹塑性微弯裂纹张开位移 |
| |
| 引用本文： | 吴凤珍,杨大鹏,赵辉,王红霞.动载荷作用下的弹塑性微弯裂纹张开位移[J].武汉大学学报(工学版),2012,45(4):485-488,519. |
| |
| 作者姓名： | 吴凤珍 杨大鹏 赵辉 王红霞 |
| |
| 作者单位： | 郑州职业技术学院基础教学部应用数学教研室,河南郑州,450121 |
| |
| 摘 要： | 主要研究了动载荷作用下的弹塑性弯曲延伸裂纹尖端的张开位移问题.综合考虑了动态作用应力、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了弯曲裂纹尖端的动态张开位移.比较了弯曲延伸裂纹与直线裂纹动态断裂特性的连续性与统一性.论证了弹塑性动态断裂特性与线弹性动态断裂特性的连续性与统一性.开拓了一个计算弯曲延伸裂纹动态张开位移的理论模型的崭新领域.
|
| 关 键 词： | 弯曲裂纹 动态 二阶摄动方法 裂纹端张开位移 断裂特性 |
Crack tip opening displacement of slightly curved extension elastoplastic crack under dynamic loads |
| |
| WU Fengzhen,YANG Dapeng,ZHAO Hui,WANG Hongxia.Crack tip opening displacement of slightly curved extension elastoplastic crack under dynamic loads[J].Engineering Journal of Wuhan University,2012,45(4):485-488,519. |
| |
| Authors: | WU Fengzhen YANG Dapeng ZHAO Hui WANG Hongxia |
| |
| Affiliation: | (Teaching and Research Section of Applied Mathematics,Foundation Teaching Department, Zhengzhou Technical College,Zhengzhou 450121,China) |
| |
| Abstract: | The crack tip opening displacement(CTOD) of elastoplastic slightly curved extension crack under dynamic loads has been mainly studied;and curved CTOD has been calculated as a practical application of a second order perturbation method and theorem of surname KA,where the effects of dynamic applied stresses and dynamic normal and dynamic shear stresses on the boundaries of plasticity area are synthetically taken into considerations.Continuity and unitarity of dynamic fracture behaviors of curved extension crack and straight crack have been compared.Continuity and unitarity of elastoplastic dynamic fracture behaviors and linear elastic dynamic fracture behaviors have been demonstrated.A brand new domain of theoretical model where dymamic CTOD of elastoplastic curved extension crack was calculated,has been reclaimed. |
| |
| Keywords: | curved crack dynamic second order perturbation solution crack tip opening displacement(CTOD) fracture behaviors |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
