To date, the effects of interface in-plane damage on the thermo-mechanical response of a thermally general imperfect (GI) and mechanically coherent energetic interface are not taken into account. A thermally GI interface allows for a discontinuity in temperature as well as in the normal heat flux across the interface. A mechanically coherent energetic interface permits a discontinuity in the normal traction but not in the displacement field across the interface. The temperature of a thermally GI interface is a degree of freedom and is computed using a material parameter known as the sensitivity. The current work is the continuation of the model developed in [21] where a degrading highly-conductive (HC) and mechanically coherent energetic interface is considered. An HC interface only allows for the jump in normal heat flux and not the jump in temperature across the interface. In this contribution, a thermodynamically consistent theory for thermally general imperfect and mechanically coherent energetic interfaces subject to in-plane degradation is developed. A computational framework to model this class of interfaces using the finite element method is established. In particular, the influence of the interface in-plane degradation on the sensitivity is captured. To this end the equations governing a fully non-linear transient problem are given. They are solved using the finite element method. The results are illustrated through a series of three-dimensional numerical examples for various interfacial parameters. In particular, a comparison is made between the results of the intact and the degraded thermally GI interface formulation.

中文翻译：

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受平面内退化的耦合热一般不完美和机械相干能量界面

迄今为止，尚未考虑界面面内损伤对热一般缺陷 (GI) 和机械相干高能界面的热机械响应的影响。热 GI 界面允许温度和跨界面的正常热通量不连续。机械相干的能量界面允许正常牵引力的不连续性，但不允许跨界面的位移场。热 GI 界面的温度是一个自由度，使用称为灵敏度的材料参数计算。当前的工作是 [21] 中开发的模型的延续，其中考虑了退化的高导电 (HC) 和机械相干高能界面。HC 界面只允许正常热通量的跳跃，而不允许界面上的温度跳跃。在这个贡献中，开发了一种热力学一致的理论，用于受面内退化的热一般不完美和机械相干高能界面。建立了使用有限元方法对此类接口进行建模的计算框架。特别是，捕获了界面面内退化对灵敏度的影响。为此，给出了控制完全非线性瞬态问题的方程。它们使用有限元方法求解。结果通过一系列不同界面参数的三维数值例子来说明。特别是，