超高分子量聚乙烯平纹织物的穿刺冲击模拟与响应分析
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摘要
运用有限元方法对带刃刀具刺穿超高分子量聚乙烯平纹织物的冲击过程进行数值模拟,并通过准静态实验验证有限元模型的有效性。通过给出布面刺破效果的数值仿真模拟,对织物刺穿过程中的纱线的应力应变分布进行分析,得到冲击系统的能量变化规律。数值模拟结果指出:刀刺织物过程中,刀具的能量主要转化为织物的弹性应变能,其余为塑性耗散能和摩擦耗散能;纱线破坏以剪切断裂为主;平纹织物的弹性回复性能有助于抵抗刀具的冲击,增强其抗剪切性能是提高防刺性能的关键。
The impact process of the edged cutter piercing UHMWPE plain weave fabric was numerically simulated by finite element method,and its effectiveness was verified by the quasi-static experiment. The numerical simulation of cloth surface piercing effect was given to analyze stress and strain distribution of yarns in the piercing process,and the energy change law of impact system was gained. The numerical simulation results show that the energy of the cutter is mainly converted into elastic strain energy of fabric in the fabric piercing process,while the rest is plastic dissipation energy and friction dissipation energy. The failure of yarns is mainly due to shear fracture. The elastic recovery property of plain fabric is helpful to resist the impact of cutter. Enhancing shear resistance of the plain fabric is the key to improve its stab-proof performance.
The impact process of the edged cutter piercing UHMWPE plain weave fabric was numerically simulated by finite element method,and its effectiveness was verified by the quasi-static experiment. The numerical simulation of cloth surface piercing effect was given to analyze stress and strain distribution of yarns in the piercing process,and the energy change law of impact system was gained. The numerical simulation results show that the energy of the cutter is mainly converted into elastic strain energy of fabric in the fabric piercing process,while the rest is plastic dissipation energy and friction dissipation energy. The failure of yarns is mainly due to shear fracture. The elastic recovery property of plain fabric is helpful to resist the impact of cutter. Enhancing shear resistance of the plain fabric is the key to improve its stab-proof performance.
引文
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[2]裴鹏英,胡雨,胡慧娜,等.柔性防弹防刺服开发关键技术[J].纺织导报,2017(S1):62-65.PEI Pengying,HU Yu,HU Huina,et al. Key technologies for developing flexible bullet-proof/stabresistant body armor[J]. China Textile Leader,2017(S1):62-65.
[3]马丕波,蒋高明,高哲,等.纺织结构复合材料冲击拉伸研究进展[J].力学进展,2013,43(3):329-357.MA Pibo,JIANG Gaoming,GAO Zhe,et al. Advances in impact tensile properties of 3-D textile structural composites[J]. Advances in Mechanics,2013,43(3):329-357.
[4]王艳飞,孙耀宁,孙文磊,等.纤维增强复合材料损伤行为及强度预测细观力学建模研究进展[J].玻璃钢/复合材料,2014(6):83-89.WANG Yanfei,SUN Yaoning,SUN Wenlei,et al. Advances of study with micromechanical modeling on damage behavior and strength predication of predication fiber reinforced composites[J]. Fiber Reinforced Plastics/Composites,2014(6):83-89.
[5]施建伟.基于ABAQUS复合材料层合板渐进损伤有限元分析[D].太原:中北大学,2015.SHI Jianwei. Finite Element Analysis of Progressive Damage of Abaqus Composite Laminates[D]. Taiyuan:North University of China,2015.
[6]周熠,陈晓钢,张尚勇,等.超高分子质量聚乙烯平纹织物在柔性防弹服中的应用[J].纺织学报,2016,37(4):60-64.ZHOU Yi, CHEN Xiaogang, ZHANG Shangyong, et al.Application of ultra-high molecular-weight polyethylene plain weave in soft body armour[J]. Journal of Textile Research,2016,37(4):60-64.
[7]邢京京,钱晓明.织物的防刺机制及刀具形状对防刺性能的影响[J].纺织学报,2017,38(8):55-61.XING Jingjing,QIAN Xiaoming. Stab-resistant mechanism of fabrics and influence of cutter shape on stab resistance[J].Journal of Textile Research,2017,38(8):55-61.
[8]庄茁.基于ABAQUS的有限元分析与应用[M].北京:清华大学出版社,2012.ZHUANG Zhuo. Finite Element Analysis and Application Based on ABAQUS[M]. Beijing:Tsinghua University Press,2012.
[9]张天阳.机织物防刺性能的有限元分析[D].上海:东华大学,2012.ZHANG Tianyang. Finite Element Analysis of Thorn Resistance of Woven Fabrics[D]. Shanghai:Donghua University,2012.
[10]徐玲玲.多层芳纶织物增强聚氨酯防刺性能的研究[D].天津:天津工业大学,2017.XU Lingling. Study on the Anti-Stab Performance of MultiLayer Aramid Fabric Reinforced Polyurethane[D].Tianjin:Tianjin Polytechnic University,2017.