复合材料科学与工程Issue(9)：8-15,26,9.DOI:10.19936/j.cnki.2096-8000.20250928.002
基于DIC的短切纤维增韧碳纤维复合材料Ⅰ型层间性能研究
Research on mode Ⅰ interlaminar properties of chopped fiber-interleaved carbon fiber reinforced composites based on DIC
摘要
Abstract
As an efficient and convenient interlaminar toughening method,chopped fiber interleaved composites has been widely used to enhance the interlaminar mechanical properties of composites.Current research lacks a sys-tematic exploration of the three-dimensional image experimental data for the interlaminar cracking process in carbon fiber-reinforced composites with chopped fiber interlayers.In this study,carbon fiber/epoxy composite laminates toughened with chopped aramid fibers and chopped flax fibers were prepared.The toughening effects of chopped fi-bers were investigated through double cantilever beam(DCB)experiments,and digital image correlation(DIC)was employed to investigate the surface strain field and damage evolution in the chopped fiber interlayer-toughened composites.The interlaminar toughening mechanisms of different chopped fibers were analyzed.The experimental re-sults demonstrated that the interlaminar insertion of chopped aramid fibers and chopped flax fibers significantly en-hanced the mode Ⅰ fracture toughness of the composite laminates.During the delamination process in the toughened DCB specimens,fiber bridging and fiber pull-out phenomena were observed.Compared to chopped flax fibers,the chopped aramid fibers exhibited more pronounced fiber bridging and crack deflection,leading to better interlaminar toughening effects.These findings provide an experimental foundation for optimizing the performance of composite.关键词
数字图像相关技术/碳纤维复合材料/短切纤维增韧/断裂韧性/纤维桥连/应变场Key words
digital image correlation/carbon fiber reinforced composite/chopped fiber toughening/fracture toughness/fiber bridge/strain field分类
通用工业技术引用本文复制引用
邓裕,涂昊昀..基于DIC的短切纤维增韧碳纤维复合材料Ⅰ型层间性能研究[J].复合材料科学与工程,2025,(9):8-15,26,9.基金项目
国家自然科学基金(51873153) （51873153）
同济大学实验教改专项(1330104154) （1330104154）
