A computational model for analysis of interface damage is introduced. It provides results for initiation and growth of cracks along a damaged interface in a multi-domain structure which is considered to be exposed to a periodically repeating load. First, the simulation of damage processes takes into account various possible relations between interface stresses and domain deformation leading to separation of subdomains in the structure expressed in a form typical for cohesive zone models. Second, equipped by a kind of viscosity associated to the evolution of the interface damage, the simulations with the proposed model considering repeating loading–unloading conditions make this damage process to have a fatigue-like nature, where the cracks appear for smaller loads and their magnitudes, while applied in cycles, compared to purely increasing loads. The computations provide evidences of such behaviour and suitability of the proposed model in situations where a structure is exposed to reoccurring load cycles.

介绍了一种分析界面损伤的计算模型。它为沿多域结构中的损坏界面引发和扩展裂纹提供了结果，该多域结构被视为承受周期性重复载荷。首先，损伤过程的模拟考虑了界面应力与区域变形之间的各种可能关系，从而导致结构中子区域的分离，该区域以内聚区模型的典型形式表示。其次，通过与界面损伤的发展相关的一种黏度，通过考虑反复加载-卸载条件的提议模型进行的模拟使这种损伤过程具有类似疲劳的性质，其中较小载荷作用下出现裂纹，与纯粹增加的负载相比，在循环中施加最大振幅。