Abstract In the present article, we propose a fully coupled thermo-elasto-plastic-damage theory, which includes both kinematic and isotropic hardening, and also accounts for hydrogen diffusion in metals. This theory is based on the thermodynamics of irreversible processes under small deformation hypothesis and suppose that hydrogen diffuses in both normal interstitial lattice sites and trapping sites. This model is implemented into Abaqus/Standard by developing a UEL user subroutine and using an “assumed strain” method. A numerical application is performed to simulate hydrogen diffusion in a metallic welded joint submitted to a long-time severe environment at constant temperature.

中文翻译：

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基于不可逆过程的热力学，对具有损伤和氢的材料的热化学机械行为进行高级建模和数值模拟

摘要 在本文中，我们提出了一种完全耦合的热-弹-塑性-损伤理论，其中包括运动硬化和各向同性硬化，还考虑了金属中的氢扩散。该理论基于小变形假设下不可逆过程的热力学，并假设氢在正常间隙晶格位和俘获位中扩散。该模型通过开发 UEL 用户子程序并使用“假定应变”方法在 Abaqus/Standard 中实现。数值应用模拟了金属焊接接头在长期恒温恶劣环境下的氢扩散。