图1. 基于线性硬化假定的双线性弹塑性界面本构模型

Fig.1. Bilinear elastoplastic interface constitutive model based on linear hardening assumption in tensile direction (a) and shear direction (b) (σ—stress in the tensile direction of the interface, σ_s—yield stress in the tensile direction of the interface, Δw₀—deformation of the interface under the tensile yield state, Δw—deformation of the interface in the tensile direction, K_z—elastic stiffness coefficient in the tensile direction, K{}_z^{\text{'}}—tangent stiffness coefficient in the tensile direction, τ—stress in the shear direction of the interface, τ_s—yield stress in the shear direction of the interface, Δu₀—deformation of the interface under the shear yield state, Δu—deformation of the interface in the shear direction, K_x—elastic stiffness coefficient in the shear direction, K{}_x^{\text{'}}—tangent stiffness coefficient in the shear direction)