以混凝土单轴拉压损伤为基础，给出了单元弹性损伤本构关系，分析了裂纹尖端损伤微裂区尺寸，定义了有效应力强度因子，给出了I型裂纹损伤断裂判据。

Mesoscopic damage size on the top of crack is analysed, the effective stress strength factor is defined, the mode I crack damage fracture criteria is presented.

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剪切屈服应力被定义为Y轴上的交会点。

Shear yield stress was defined as the intercept point on the Y-axis.

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将材料响应的总应力表示为平衡态应力和非平衡态过应力的和，分别定义描述率无关和率相关变形过程的内时。

The total stress response of material is decomposed into a sum of an equilibrium stress response and a non-equilibrium overstress response.

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