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采用有限元计算方法研究了在4点弯曲载荷作用下,残余应力、涂层与基体的弹性模量比(简称弹性模量比)对涂层/基体材料界面能量释放率及其相角的影响。结果表明:能量释放率随着残余拉应力、弹性模量比的增大而增大;能量释放率中的相角也随着残余拉应力的增大而增大,但并不敏感,其随着弹性模量比的增大而减小。研究结果可为评价涂层/基体材料界面结合性能提供理论依据,有助于深化对涂层/基体材料界面结合性能的认识。
The effects of the residual stress, the elastic modulus ratio of the coating to the matrix (referred to as the elastic modulus ratio) on the energy release rate and the phase angle of the coating / matrix interface under 4-point bending load were studied by finite element method . The results show that the energy release rate increases with the increase of residual tensile stress and elastic modulus ratio. The phase angle of energy release rate also increases with the increase of residual tensile stress, but it is not sensitive. The elastic modulus ratio increases and decreases. The results of the study can provide a theoretical basis for evaluating the bonding properties of the coating / matrix material interface, and help to deepen the understanding of the bonding performance of the coating / matrix material interface.