A new brittle-elastoviscoplastic (BEVP) fluid model is presented in this paper. This model is relatively simple to use, as it contains few material parameters and a simple fixed-point algorithm is effective for solving the coupled system of equations. The model combines some existing fundamental features such as elasticity, plasticity and brittle damage. The combination of them is based on thermodynamics that ensures the positivity of the dissipation and the Onsager symmetry. Moreover, thermodynamics allows to point out the link between thixotropy and damage in the context of elastoviscoplastic (EVP) fluids. Theoretical results on the Drucker–Prager plasticity criterion are completed in order to use it here. Preliminary results with the proposed BEVP model are very encouraging: it is able to represent the pre-failure, failure and post-failure behavior of quasi-brittle materials.

本文提出了一种新的脆性弹粘塑性 (BEVP) 流体模型。该模型使用起来相对简单，因为它包含的材料参数很少，并且简单的定点算法对于求解耦合方程组很有效。该模型结合了一些现有的基本特征，如弹性、塑性和脆性损伤。它们的组合基于确保耗散和 Onsager 对称性的正性的热力学。此外，热力学允许在弹粘塑性 (EVP) 流体的背景下指出触变性和损坏之间的联系。Drucker-Prager 塑性准则的理论结果已完成，以便在此使用。所提出的 BEVP 模型的初步结果非常令人鼓舞：它能够代表预故障，