为了探究三维浅交弯联芳纶1414纤维增强环氧树脂(Kevlar/EP)装甲材料在弯曲载荷下的力学响应,借助Pro/Engineer绘图软件,建立材料及弯曲压头的几何结构模型;利用ANSYS有限元软件,分析材料在0.5mm弯曲位移载荷下的力学响应。结果表明,当三维浅交弯联Kevlar/EP装甲材料长度尺寸较小时,材料在弯曲载荷作用下,剪切破坏是导致材料失效的主要因素。在剪切位置处,经纱、纬纱的应力分布均为:上层>中间层>下层。经纱起主要承载作用,纬纱次之,树脂只起辅助作用。材料破坏的主要模式是树脂的碎裂、纤维与树脂的严重脱粘等。
In order to explore the mechanical response of Kevlar/EP armor materials using 3D curved shallow-crossing linking weave under bending load,the geometric structure model of the materials and bending head was established by using Pro/Engineer drawing software.ANSYS finite element software was used to analyze the mechanical response of the material under the bending displacement load of 0.5mm.The results shown that when the length of Kevlar/EP armor materials using 3D curved shallow-crossing linking weave was small,shear failure was the main factor leading to the failure of the material under the action of bending load.At the shearing position,the stress distribution of warp and weft was as follows:the upper layer>the middle layer>the lower layer.The warp played the main bearing role,the weft second,and the resin played the auxiliary role.The main failure modes of the materials were resin fragmentation,fiber and resin serious debonding and so on.
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