作　　者： ; ; ; ; ; ;

机构地区： 沈阳航空航天大学

出　　处： 《机械强度》 2016年第1期167-172,共6页

摘　　要： 基于Ansys软件建立了300M钢不同厚度M(T)试样的三维应力强度因子计算模型,比较了不同厚度下应力强度因子的数值解。将不同厚度下应力强度因子的数值解与解析解通过Paris公式拟合得到相应的a-N曲线并与实验数据进行对比,结果表明:应力强度因子有限元数值解具有厚度效应,对于不同厚度下的解析解有一定的修正作用。 Based on ANSYS, a finite element model of calculating stress intensity factor （SIF） for 300M steel M （T） sample with different thickness was established and the numerical solutions of SIF for different thickness were compared. The a- N curves were accordingly fitted through the SIF numerical solutions and the SIF analytical solutions of different thickness and the Paris formula. And the fitting curves were compared with the experimental data. The results show that the thickness effect influences the finite element numerical solutions of SIF considerably and for the analytical solutions of different thickness, the numerical solutions have certain thickness correction.

关 键 词： 应力强度因子 厚度效应 厚度修正

领　　域： [航空宇航科学与技术] [理学] [理学]