复合材料科学与工程Issue(3)：46-53,8.DOI:10.19936/j.cnki.2096-8000.20250328.007
单向玻璃纤维增强热塑性树脂基复合材料成型极限试验研究
Experimental study on the forming limit of unidirectional glass fiber reinforced thermoplastic composites
摘要
Abstract
In this study,the forming limits of unidirectional glass fiber reinforced thermoplastic composites were discussed,aiming to provide a reference for the forming process design and failure behavior prediction.Firstly,the GFRP laminate with a thickness of 1.80 mm was prepared by hot molding with a continuous unidirectional glass fi-ber reinforced polyamide 6 belt at a ply angle of[0/90]4.Secondly,the failure modes of the bell specimens and the modified notched specimens were compared based on the Nakajima forming limit test.Finally,the specimen suitable for the study of the forming limit of the GFRP laminate was determined,and the forming performance was character-ized by constructing the forming limit curve.The test results show that with the increase of the width of the speci-mens,the stress state and deformation mode change from uniaxial tensile to biaxial tensile mode.The specimens ex-hibit three typical failure modes,including fiber tensile fracture,fiber pull-out fracture,and bending-shear cou-pling fracture modes.The specimens showed the characteristics of brittle fracture,and there was no necking phe-nomenon before fracture,so the forming limit curve shall be constructed through scatter distribution.Compared with the traditional bell specimens,the notched specimens are more suitable for the experimental study of the forming limit of fiber reinforced composites.关键词
单向玻璃纤维增强热塑性树脂基复合材料/Nakajima试验/成型极限曲线/试样改型/失效模式Key words
unidirectional glass fiber reinforced thermoplastic composites/Nakajima test/forming limit curve(FLC)/specimen modification/failure mode引用本文复制引用
亓昌,武鹏程,盈亮,杨姝..单向玻璃纤维增强热塑性树脂基复合材料成型极限试验研究[J].复合材料科学与工程,2025,(3):46-53,8.基金项目
国家重点研发计划课题(2022YFB2503503) （2022YFB2503503）
