摘要
基于有限元法,对添加涂层后的I型V形切口尖端附近的最大周向应力和应力强度因子进行了数值分析。结果表明,随着涂层材料弹性模量的增大,切口尖端附近的最大周向应力和应力强度因子均增大;随着涂层厚度的增加,切口尖端附近的最大周向应力减小,而应力强度因子减少的很小。对于双层结构的涂层,弹性模量大的区域中的最大周向应力大;材料的热膨胀系数相差越大,在界面处最大周向热应力突变越大。
Based on the finite element method, the maximum circumferential stress and stress intensity factor near the tip of mode I V--notch added coating are analyzed numerically. The results show that both the maximum circumferential stress and stress intensity factor are increasing as the elastic modulus of the coating is increasing. When the thickness of the coating is increased, the maximum circumferential stress decreases and the stress intensity factor decrease little. For the coating with two layers, the maximum circumferential stress is larger in the area with the larger elastic modulus. The larger is the difference between the thermal expansion coefficients of two materials, the larger is the abrupt change value of the maximum circumferential thermal stress at the interface.
出处
《安徽建筑工业学院学报（自然科学版）》
2009年第2期9-13,共5页
Journal of Anhui Institute of Architecture(Natural Science)
关键词
V形切口
涂层
弹性模量
断裂
有限元法
V-- notch
coating
elastic modulus
fracture
finite element method
