Path-Dependent Progressive Failure Analysis for 3D-Printed Continuous Carbon Fibre Reinforced Composites  

作　　者：Yuan Chen Lin Ye 

机构地区：[1]School of System Design and Intelligent Manufacturing(SDIM),Southern University of Science and Technology,Shenzhen 518055,China [2]Shenzhen Key Laboratory of Intelligent Manufacturing for Continuous Carbon Fibre Reinforced Composites,Southern University of Science and Technology,Shenzhen 518055,China

出　　处：《Chinese Journal of Mechanical Engineering》2024年第4期84-93,共10页中国机械工程学报（英文版）

基　　金：Supported by National Natural Science Foundation of China (Grant No.12302177);Guangdong Provincial Basic and Applied Basic Research Foundation of China (Grant No.2024A1515010203);Shenzhen Science and Technology Program of China (Grant No.JCYJ20230807093602005);Shenzhen Key Laboratory of Intelligent Manufacturing for Continuous Carbon Fibre Reinforced Composites of China (Grant No.ZDSYS20220527171404011)。

摘　　要：In order to predict the damage behaviours of 3D-printed continuous carbon fibre(CCF)reinforced composites,when additional short carbon fibre(SCF)composite components are employed for continuous printing or special functionality,a novel path-dependent progressive failure(PDPF)numerical approach is developed.First,a progressive failure model using Hashin failure criteria with continuum damage mechanics to account for the damage initiation and evaluation of 3D-printed CCF reinforced polyamide(PA)composites is developed,based on actual fibre placement trajectories with physical measurements of 3D-printed CCF/PA constituents.Meanwhile,an elastic-plastic model is employed to predict the plastic damage behaviours of SCF/PA parts.Then,the accuracy of the PDPF model was validated so as to study 3D-printed CCF/PA composites with either negative Poisson's ratio or high stiffness.The results demonstrate that the proposed PDPF model can achieve higher prediction accuracies in mechanical properties of these 3D-printed CCF/PA composites.Mechanism analyses show that the stress distribution is generally aggregated in the CCF areas along the fibre placement paths,and the shear damage and matrix tensile/compressive damage are the key damage modes.This study provides a new approach with valuable information for characterising complex 3D-printed continuous fibre-matrix composites with variable mechanical properties and multiple constituents.

关 键 词：3D printing Continuous carbon fibre MODELLING Energy absorption Negative Poisson's ratio 

分 类 号：TB332[一般工业技术—材料科学与工程] TP391.73[自动化与计算机技术—计算机应用技术]