| 混凝土三点弯曲试验的计算机模拟 |
| |
| 引用本文： | 朱万成,王述红,唐春安.混凝土三点弯曲试验的计算机模拟[J].东北大学学报(自然科学版),1999,20(5):533-535. |
| |
| 作者姓名： | 朱万成 王述红 唐春安 |
| |
| 作者单位： | 东北大学资源与土木工程学院!沈阳110006;东北大学资源与土木工程学院!沈阳110006;东北大学资源与土木工程学院!沈阳110006 |
| |
| 基金项目： | 国家杰出青年科学基金，中国科学院力学研究所非线性连续介质力学开放实验室基金 |
| |
| 摘 要： | 根据混凝土试件三点弯曲试验的物理模型,用ＭＦＰＡ数值模拟系统对砂浆和混凝土三点弯曲试件中预裂纹的扩展直至试件宏观破裂的整个过程进行了模拟分析·计算机模拟给出了试件的载荷 加载步曲线和混凝土试件的破坏过程的应力分布图·最后,对试件的破坏过程进行了分析,认为裂纹尖端的拉应力是裂纹扩展的动力,指出了混凝土组成材料的非均匀性是造成裂纹扩展路径曲折性的重要原因·
|
| 关 键 词： | 三点弯曲 非均匀性 破坏过程 数值模拟 |
混凝土三点弯曲试验的计算机模拟 |
| |
| Zhu Wancheng,Wang Shuhong,Tang Chun''''an.混凝土三点弯曲试验的计算机模拟[J].Journal of Northeastern University(Natural Science),1999,20(5):533-535. |
| |
| Authors: | Zhu Wancheng Wang Shuhong Tang Chun'an |
| |
| Abstract: | According to physical model of three point bending test, the complete processes from the initiation and propagation of microcracks to the macroscopic failure of concrete specimen and mortar specimen were simulated by using MFPA 2D (material failure process analysis) code. The load step curve and the stress distribution figures during the deformation and failure process of the concrete specimen were presented. Based on the analysis of simulated results, it is concluded that the tensile stress at the crack tip is the driving force for the crack propagation, and the heterogeneity of concrete has a great influence on the crack propagation path which leads the crack propagation path becoming curvilinear. |
| |
| Keywords: | three point bending heterogeneity failure process numerical simulation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《东北大学学报(自然科学版)》浏览原始摘要信息 |
| 点击此处可从《东北大学学报(自然科学版)》下载免费的PDF全文 |
