摘要
利用非线性有限元软件ABAQUS,以较少的单元建立了模拟循环载荷下裂尖参数变化的二维弹塑性有限元模型,通过应力、位移及塑性区尺寸等裂尖参数的有限元计算值与力学公式计算的理论值的比较,分析了不同单元类型对裂尖参数的影响,为解决有应力集中的二维弹塑性有限元问题提供了一种高效准确的模型.
An effective two -dimensional elastic -plastic finite element model has been set up to model the change of crack tip parameters under cycle loading. The non - linear finite element software, ABAQUS, has been used in this analysis. The calculated results of the crack tip parameters, such as stress, displacement and plastic zone size, have been compared with the results obtained by the Fracture Mechanics laws. The effects of the differ- ent element types on the crack tip parameters have been analyzed. It is found that the two -dimensional elastic - plastic finite element method is an effective model to solve the near crack tip stress concentration problem under cycle loading.
出处
《哈尔滨理工大学学报》
CAS
2008年第5期9-13,17,共6页
Journal of Harbin University of Science and Technology
基金
国家自然科学基金资助项目(10772063)
关键词
疲劳裂纹
有限元模型
弹塑性
fatigue crack
finite element model
elastic-plastic
