论文部分内容阅读
本文研究应变软化材料的本构关系，提出了一个考虑损伤的粘塑性模型，损伤不仅影响材料的临界应力，而且影响材料的粘塑性，为模拟材料的应变软化行为，假设受损混凝土的破坏局部区域由模糊裂纹和损伤所统治，软化模量和局部区域尺度参量是依赖于模糊裂纹扩展时释放的断裂能的参变量，用文中提出的模型计算了混凝土单轴压缩时不同应变速率下的瞬时应力应交响应以及等应力长期作用下的徐变，均得到很好的结果．
In this paper, we study the constitutive relationship of strain softening material and propose a viscoplastic model considering damage. The damage not only affects the critical stress of the material, but also affects the material’s viscoplasticity. To simulate the strain softening behavior of the material, The region is dominated by fuzzy cracks and damage. The softening modulus and the local area scale parameter are parameters dependent on the fracture energy released when the fuzzy crack propagates. The instantaneous moment of concrete with different strain rates is calculated by using the model proposed in this paper Stress should be given response and the long-term effect of constant stress creep, have been very good results.