利用有限元软件Workbench,建立了三维间隔复合材料的细观模型;对材料施加1.5mm的面内压缩位移载荷,研究材料的破坏模式及应力、应变分布规律。结果表明:从宏观角度观察,材料上下面板应力较大,容易发生破坏;芯材应力较小,不易发生破坏。从细观角度观察,上下面板的经纱、纬纱、接结经纱的应力较大,是承载主体;树脂的应力较小,起次要作用。上下面板的纬纱平均应力最大,且分布具有随机性。材料的破坏模式主要是上下面板树脂破碎、树脂与纤维严重脱粘等。
A new meso-structural model of three-dimensional space composite (3D composite) was built by using the finite element software Workbench.By using the model,in-plane compressive displacement loads with 1.5mm were applied on the 3D composite,and failure mode and distribution of stress & strain was studied too.The results shown that the maximum value of stress occurred on the upper and lower face-sheet macroscopically,where the 3D composite damaged easily.The minimum value of stress occurred on the piles,where the composites damaged difficultly.The yarns of warp,weft and binder warp on upper and lower face-sheet played a major role in bearing,while the resin played a minor role.The average stress value of upper and lower face-sheet was best,and distribution of stress was random.The failure mode was crushing of the resin,and interfacial de-bonding between fibers and resin,which all occurred on the upper and lower face-sheet.
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基金资助
国家重点研发计划(2018YFC0810300);江苏省“六大人才高峰”高层次人才项目(XCL-061);江苏省高校自然科学研究重大项目(16KJA430009);江苏省先进纺织工程技术中心开放基金重大项目(XJFZ/2018/02)
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