FRACTURE MECHANISM OF STRAIN HARDENING CEMENTITIOUS COMPOSITES THROUGH THREE-DIMENSIONAL MESO SCALE ANALYSIS

摘要

There are a wide variety of short fiber reinforced cement composites. One of the novel properties is strain hardening with multiple cracking in tension. Quantitative material design methods considering the properties of matrix, fiber and their interface should be established. This paper introduces numerical model by means of three-dimensional meso scale analysis (i.e. matrix, fiber and their interface are discretized respectively.), to simulate the tensile fracture including strain hardening and multiple cracking. In the model, the short fibers with specific length and diameter have been randomly arranged within the specimen. It was clarified that the tensile fracture of high strength Strain Hardening Cementitious Composites (SHCC) includes crack patterns significantly depended on the matrix strength, its variation and fiber distribution through the parametric studies.