文献类型：期刊文献

英文题名：Micro-CT based trans-scale damage analysis of 3D braided composites with pore defects

作者：Ge, Lei Li, Huimin Zhong, Jiehua Zhang, Chun Fang, Daining

第一作者：Ge, Lei

通信作者：Li, HM[1]

机构：[1]Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China;[2]Xi An Jiao Tong Univ, State Key Lab Strength & Vibrat Mech Struct, Xian, Peoples R China;[3]Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Beijing 10081, Peoples R China;[4]Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China;[5]China Acad Launch Vehicle Technol, Beijing 100076, Peoples R China;[6]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang 550003, Peoples R China

第一机构：Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China

通信机构：corresponding author), Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China.

年份：2021

卷号：211

外文期刊名：COMPOSITES SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20211910328861);Scopus(收录号：2-s2.0-85105345663);WOS:【SCI-EXPANDED(收录号:WOS:000660256700001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (12072029, 11602020, 51863003) , National defense Basic research program of China (JCKY2019602D024) , Shanghai Space Science and Technology Innovation Fund Project (202032041007) , Laboratory research project of Beijing Institute of Technology (2019BITSYA33) , Frontier and interdisciplinary innovation projects of Beijing Institute of Technology (2018CX11001) , Fund of State Key Laboratory for Strength and Vibration of Mechanical Structures (SV2018KF15) , Beijing Institute of Technology Research Fund Program for Young Scholars.

语种：英文

外文关键词：3D braided composite; Micro-CT; Trans-scale analysis; Pore defect; Damage failure

摘要：Pore defects that inevitably produce during the manufacturing process, have distinct effects on the mechanical properties of 3D braided composites. A trans-scale method coupled with Micro-CT is developed to investigate the strength and damage behavior of 3D braided composites with pore defects. Pore defects and yarns are measured by Micro-CT and reconstructed. Then, the trans-scale finite element models are established on the Micro-CT data. The progressive damage model and cohesive-zone model are applied to simulate the damage behavior of braided composites, and effects of interface strength are also investigated. Effective properties of yarns are predicted by the micro-scale analysis and then transferred to conduct the meso-scale analysis. The meso-scale finite element model can predict the stress-strain response well, which has been validated by experiments. The failure modes of yarn damage, matrix cracking and interface debonding are recognized and correspond well with the final failure morphology of the sample. The damage appears around the pore defects and then develops to the weak region in the matrix. The interface properties show diverse influences on yarns and braided composites under different loading conditions. As experimentally demonstrated, the present research scheme can well capture the void features, and therefore efficiently predict the tensile behavior of 3D braided composites considering pore defects.