Elasto-visco-plastic Analysis of Deformation and Failure of Brittle Material by Particle Model

本研究通过弹粘塑性分析和模型混凝土试验，研究混凝土的本构规律，建立模拟混凝土在各种荷载作用下大变形或破坏的通用力学模型。这些结果将有助于今后合理的混凝土材料设计的发展。主要研究结果如下：1)提出了混凝土弹粘塑性悬浮单元法破坏模拟方法。2)得到了不同应力下混凝土解析模型的输入参数。3)用模型混凝土对试验结果进行了验证。4)利用该分析方法对混凝土中的声发射特性进行了模拟。

In this research, the elasto-visco-plastic analyzes and the experiments with model concretes were carried out to investigate the constitutive law and to establish the general mechanical model for simulating the large deformation or the failure of concrete under various loading. These results will contribute to the development of the rational material design of concrete in future.The main results obtained by this research can be summarized as follows :1) The simulation method for failure of concrete by elasto-visco-plastic suspension element method was proposed.2) The input parameters of analytical model of concrete under various stress were obtain.3) The simulation method was confirmed for the experimental results with model concretes.4) The simulation of the behavior of acoustic emission in concrete was carried out by this analytical method.