An investigation on prevalent strategies for XFEM-based numerical modeling of crack growth in porous media
作者机构：Mining Engineering GroupFaculty of EngineeringUniversity of ZanjanZanjan45371-38791Iran Materials Engineering GroupFaculty of EngineeringUniversity of ZanjanZanjan45371-38791Iran
出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)
年 卷 期：2021年第15卷第4期
页 面：914-936页
核心收录：
学科分类：1305[艺术学-设计学（可授艺术学、工学学位）] 08[工学] 0813[工学-建筑学] 0814[工学-土木工程] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）]
主 题：numerical modeling extended finite element method porous media crack growth stress intensity factor
摘 要：Crack growth modeling has always been one of the major challenges in fracture *** all numerical methods,the extended finite element method(XFEM)has recently attracted much attention due to its ability to estimate the discontinuous deformation ***,XFEM modeling does not directly lead to reliable results,and choosing a strategy of implementation is inevitable,especially in porous *** this study,two prevalent XFEM strategies are evaluated:a)applying reduced Young’s modulus to pores and b)using different partitions to the model and enriching each part *** mention the advantages and limitations of each strategy via both analytical and experimental ***,the crack growth is modeled in a natural porous media(Fontainebleau sandstone).Our investigations proved that although both strategies can identically predict the stress distribution in the sample,the first strategy simulates only the initial crack propagation,while the second strategy could model multiple cracks *** strategies are reliable and highly accurate in calculating the stress intensity factor,but the second strategy can compute a more reliable reaction *** tests showed that the second strategy is a more accurate strategy in predicting the preferred crack growth path and determining the maximum strength of the sample.
维普期刊数据库
同方期刊数据库