一个经过修订的Abaqus®基于材料力度标准的断裂路径模拟程序
Jakub Gontarz1, Jerzy Podgórski1
1Department of Civil Engineering and Architecture, Lublin University of Technology, 20-618 Lublin, Poland.
Materials (Basel, Switzerland)
|August 29, 2024
概括
计算机模拟准确地模拟了实验室测试中的骨折,使用五个失败标准和扩展有限元素方法 (X-FEM). 改进的X-FEM程序在砂岩和混凝土等材料中提供了更现实的裂传播路径.
科学领域:
- 计算力学是计算力学.
- 材料科学是一种材料科学.
- 地质技术工程地质技术工程
背景情况:
- 精确模拟材料断裂对于工程设计至关重要.
- 现有的数值方法可能无法完全捕捉复杂的裂传播行为.
- 实验室测试为验证计算模型提供了必要的数据.
研究的目的:
- 为了比较五种不同的材料故障标准在模拟断裂中的有效性.
- 实施和评估用于裂传播建模的增强扩展有限元素方法 (X-FEM).
- 为了评估模拟裂纹路径与实验结果的准确性.
主要方法:
- 使用了Abaqus®有限元素分析 (FEA) 系统.
- 实施了兰金,库伦-莫尔,德鲁克-普拉格,奥托森-波德戈尔斯基和霍克-布朗的失败标准.
- 采用扩展有限元法 (X-FEM) 在三个实验室测试中模拟裂传播:三点曲形梁,自动切割的拉出测试和混凝土杆的拉出测试.
主要成果:
- 所有五个失败标准都产生了可比的力位移关系.
- 模拟的裂纹路径形状在不同的标准中是相似的.
- 与标准的Abaqus®子程序相比,增强的X-FEM程序在预测裂传播路径方面显示出显著提高的准确性.
- 模拟与实验室测试中观察到的真实世界裂行为非常相匹配.
结论:
- 该研究验证了在X-FEM框架内用于骨折模拟的多重故障标准的使用.
- 增强的X-FEM方法为模拟砂岩和混凝土等材料的裂纹传播提供了更现实的和更准确的方法.
- 这种改进的模拟技术对结构分析和材料设计有重大影响.
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