为研究三维深角联对位芳纶/环氧树脂(Kevlar/EP)复合材料沿经向、纬向的弯曲性能及其失效机制,建立材料的1/2几何对称模型,利用ANSYS有限元软件分别沿材料经向、纬向进行0.5mm弯曲位移载荷的数值模拟。分析材料沿经向、纬向的弯曲性能并结合三维深角联的结构特征观察其力学响应。结果表明,三维深角联 Kevlar/EP复合材料沿不同方向的弯曲性能及失效机制不同。材料沿经向弯曲加载至0.5mm时的载荷为123.66N,其中经纱是承载主体,材料失效的主要原因是与上压头直接接触处的经纱断裂;材料沿纬向弯曲加载至0.5mm时的载荷为193.64N,其中纬纱是承载主体,材料失效的主要原因是与上压头直接接触处的纬纱断裂。
In order to study the bending performance of the three-dimensional deep-angle interlock Kevlar/EP composite along the warp and weft and its inherent failure mechanism,a 1/2 geometric symmetric model of the material was established,and the ANSYS finite element software was used to make numerical simulation of 0.5mm bending displacement load along the warp and weft respectively.The bending properties of the material along the warp and weft directions were analyzed and its mechanical response in combination with the structural characteristics of the three-dimensional deep-angle interlock was observed.The results showed that the three-dimensional deep-angle interlock Kevlar/EP composites had different bending properties and failure mechanisms in different directions.When the material was loaded to 0.5mm bending in the warp direction,the load was 123.66N;moreover,the warp yarn was the main body of the load and the main reason for the material failure was the warp yarn break in the direct contact with the upper indenter.However,when the material was loaded to 0.5mm bending in the weft direction,the load was 193.64N,in which the weft yarn was the main body of the load bearing and the main reason for the material failure was the break of the weft yarn in the direct contact with the upper indenter.
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基金资助
国家重点研发计划(2018YFC0810300);江苏省高校自然科学研究重大项目(18KJA430011)
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