ECC多重饱和裂纹破坏细观统计力学计算模型研究

摘要

Micromechanic statistic computational model is used to reproduce and predict hardening stress-strain curves of Engineered Cementitious Composite (ECC) through consideration of stochastic character of the composite mi-crostructure. The model captures the sequence of crack formation and the load fluctuations that are characteristic for the process of multiple saturated cracking. The effect of introduced artificial flaws on improvement of the composite ductility is verified by computational results.%；根据ECC复合材料微观结构中缺陷的随机分布性质，给出细观统计力学分析计算模型。该模型可用来求解工程水泥基复合材料（ECC）硬化后的应力-应变曲线并真实地反映多重裂纹稳态断裂破坏过程中裂纹形成的顺序和荷载波动的特点。计算结果较好地证实了含有人造Norlite缺陷的ECC复合材料的延性特征。