Jang, Jinhyeok Jeon, Seung-Yeol Choi, Jae-Hyuk Shim, Wonbo Cho, Jeong-Min Yoon, Sang-Jae Choi, Chi-Hoon Yu, Woong-Ryeol 2024-01-19T14:00:25Z 2024-01-19T14:00:25Z 2021-10-21 2021-09-15 0263-8223 https://pubs.kist.re.kr/handle/201004/116467 Mechanical modeling of fiber-reinforced plastics to predict nonlinear mechanical behavior along the off-axis direction is very complex due to tension-compression asymmetry. This study aimed aims to develop a generalized constitutive model for different types of unidirectional and woven composites, considering tension-compression asymmetry in various deformation ranges from elastic to plastic, and finally to failure. To capture the asymmetry effectively, a new multivariable plastic model was proposed with additional dilatational components and different elastic moduli for tension and compression. Finally, asymmetric failure criteria and a damage evolution law were introduced for strength prediction. The proposed model was implemented in a finite element analysis software via a user material subroutine, and experimentally validated in terms of off-axis tension and compression tests in various loading directions. The experimental results were accurately predicted using a multi-parameter plastic model in this study compared to previous other models with few parameters. English ELSEVIER SCI LTD PROGRESSIVE FAILURE ANALYSIS TENSION-COMPRESSION ASYMMETRY FINITE-ELEMENT-ANALYSIS RATE-DEPENDENT BEHAVIOR NONLINEAR BEHAVIOR AS4/PEEK COMPOSITE CARBON COMPOSITE PART I MODEL STRENGTH Mechanical analysis of fiber-reinforced plastics using an elastoplastic-damage constitutive equation considering asymmetric material behavior Article 10.1016/j.compstruct.2021.114268 1 COMPOSITE STRUCTURES, v.272 COMPOSITE STRUCTURES 272 scie scopus 000677915700007 2-s2.0-85109127963 Mechanics Materials Science, Composites Mechanics Materials Science Article PROGRESSIVE FAILURE ANALYSIS TENSION-COMPRESSION ASYMMETRY FINITE-ELEMENT-ANALYSIS RATE-DEPENDENT BEHAVIOR NONLINEAR BEHAVIOR AS4/PEEK COMPOSITE CARBON COMPOSITE PART I MODEL STRENGTH Fiber-reinforced plastics Tension-compression asymmetry Constitutive equation Elasto-plastic Failure criterion