基于扩展有限元的非对称四点梁复合型开裂分析  

Compound Fracture Analysis of Asymmetric Four-point Beam with Extended FEM

作　　者：戚颖[1,2] 郑东健[1,2] 刘杨 

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [3]国网新源控股有限公司 [4]山西西龙池抽水蓄能电站有限责任公司,山西忻州035503

出　　处：《水电能源科学》2013年第2期129-132,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(50879024)

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。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.

关 键 词：扩展有限元 混凝土梁 三维裂缝扩展 复合型开裂 数值分析 

分 类 号：TV331[水利工程—水工结构工程]