Cement mortar is an important part of building material and a typical cement matrix composite material. In current work, the mechanical properties and failure mechanism of cement mortar under static compression are studied by using the Base Force Element Method (BFEM). The static compression damage program of cement mortar is compiled grounded on the BFEM of the potential energy principle. An elastic polyline damage constitutive model is put forward to express the meso‐damage and evolution process of cement mortar. A 2D random circular aggregate model of cement mortar was established. The numerical simulation of the uniaxial static compression is carried out, the stress–strain curve, damage process, and damage model are obtained. The strength of the interfacial transition zone and the failure process of hardened cement mortar were discussed. A mesoscopic equivalent model is proposed to analyze the mechanical properties of cement mortar by considering the effect of initial porosity.

中文翻译：

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水泥砂浆断裂过程的细观数值模拟与破坏机理

水泥砂浆是建筑材料的重要组成部分，是典型的水泥基复合材料。在目前的工作中，采用基础力元法（BFEM）研究了水泥砂浆在静压下的力学性能和破坏机理。水泥砂浆的静态压缩损伤程序是基于势能原理的BFEM编制的。提出了弹性折线损伤本构模型来表达水泥砂浆的细观损伤和演化过程。建立了水泥砂浆的二维随机圆形骨料模型。进行了单轴静压缩的数值模拟，获得了应力-应变曲线，损伤过程和损伤模型。讨论了界面过渡区的强度和硬化水泥砂浆的破坏过程。