3D simulation of image-defined complex internal features using the numerical manifold method  

作　　者：WU Jie MA GuoWei 

机构地区：[1]School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China [2]Tianjin Key Laboratory for Prefabricated Building and Intelligent Construction,Tianjin 300401,China

出　　处：《Science China(Technological Sciences)》2024年第4期1023-1039,共17页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.41807277,42172306,and U1965204);the Natural Science Foundation of Hebei Province(Grant No.D2019202440)。

摘　　要：The numerical simulation of internal features,such as inclusions and voids,is important to analyze their impact on the performance of composite materials.However,the complex geometries of internal features and the induced continuous-discontinuous(C-D)deformation fields are challenges to their numerical simulation.In this study,a 3D approach using a simple mesh to simulate irregular internal geometries is developed for the first time.With the help of a developed voxel crack model,image models that are efficient when recording complex geometries are directly imported into the simulation.Surface reconstructions,which are usually labor-intensive,are excluded from this approach.Moreover,using image models as the geometric input,image processing techniques are applied to detect material interfaces and develop contact pairs.Then,the C-D deformations of the complex internal features are directly calculated based on the numerical manifold method.The accuracy and convergence of the developed3D approach are examined based on multiple benchmarks.Successful 3D C-D simulation of sandstones with naturally formed complex microfeatures demonstrates the capability of the developed approach.

关 键 词：3D continuous-discontinuous simulation image-based simulation complex internal features numerical manifold method voxel crack model structured mesh 

分 类 号：O241.82[理学—计算数学]