【摘要】 针对裂纹在三维实体中沿曲线或曲折路径扩展问题,应用三维扩展有限元的基本原理,结合ABAQUS有限元分析软件和粘聚裂缝模型,对混凝土梁在荷载作用下的复合型开裂过程进行了数值模拟分析。模拟结果与试验资料对比分析结果表明,基于扩展有限元法的三维模型对裂纹路径具有较高的预测精度,能有效分析实际工程中的复杂断裂失效问题。更多还原

【Abstract】 Aiming at the cracks path propagation along curves or broken lines in three-dimensional solid,the principle of three-dimensional extended finite element method(XFEM) is applied to numerically simulate the compound cracking process of concrete beam under the action of loading by combining ABAQUS software and crack cohesion model.Comparison of simulation results and test data,it shows that three-dimensional model based XFEM method has high prediction precision for fracture path propagation,which can effectively analyze complex fracture failure problem in practical project.更多还原