The behaviour of rocks and other similar geomaterials is governed by different underling dissipative mechanisms that can be represented by damage and plastic strains in continuum constitutive modelling. The explicit links between these dissipative mechanisms and constitutive behaviour are established in this study in a generic thermodynamics-based framework. The key feature of this proposed framework and derived damage-plasticity models is the capability to control the constitutive behaviour through varying the contributions of different dissipative mechanisms to the total dissipation budget. Particularly, three fractions of the total dissipation budget related to damage, plastic volumetric and shear dissipations are introduced to control the constitutive behaviour through the evolution of damage variable and plastic strains, respectively. The examples provided show the performance and promising features of the proposed framework.

中文翻译：

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利用能量耗散控制岩石本构模型的行为


岩石和其他类似地质材料的行为受不同基础耗散机制的控制，这些机制可以用连续本构建模中的损伤和塑性应变来表示。这些耗散机制和本构行为之间的明确联系在本研究中建立在基于热力学的通用框架中。这个提出的框架和衍生的损伤塑性模型的主要特点是能够通过改变不同耗散机制对总耗散预算的贡献来控制本构行为。特别是，引入了与损伤、塑性体积和剪切耗散相关的总耗散预算的三个部分，以分别通过损伤变量和塑性应变的演变来控制本构行为。提供的示例显示了所提出的框架的性能和有前途的功能。