Static andDynamic Behaviors of Extruded Low-Density Polyethylene and Ultra-High Molecular Weight Polyethylene 机翻标题: 暂无翻译,请尝试点击翻译按钮。

会议集名/来源
第六届全国强动载效应及防护学术会议暨2014年复杂介质/结构的动态力学行为创新研究群体学术研讨会论文集
出版年
2014-07
会议地点
中国北京
作者单位
State Key Laboratory of Explosion Science and Technology,Beijing Institute of TechnologyDepartment of Engineering,University of Cambridge
作者
Guang-yan Huang;Ming-ming Xu;Yang Bai;Shun-shan Feng;W.J.Stronge;G.J.MacShane
摘要
Thepolyethylene is ofunique predominance in light armor applications.The mechanical properties ofextruded polymers are strongly affected by their molecular structures and distribution.Therefore,twotypicaldifferenttypes of extrudedpolyethylene:low-density polyethylene(LDPE)and ultra-high molecular weightpolyethylene(UHMWPE)werechosenin thisstudy to experimentally investigate the dependency of molecule structures towardsmechanical properties of polyethylene over a wide range of strain rate from 0.001 s~(-1)up to3300s~(-1).The static anddynamic material testsrevealed thatextruded UHMWPE showed a much more obvious strain-hardening effect than that ofLDPE,in addition,it is of an extraordinary higher elongation and stress at failure in Quasi-static tensile tests,and much higher yield stress at SHPB tests.Furthermore,Cowper-Symonds model wasemployed to predict the strain rate effect and in good agreement with the experimental results.It indicates that UHMWPEperforms abettermechanicalbchaviorunderhigh strainratesdeformationthanLDPE;hence,the extruded UHMWPE is more amenable to large deformation and high high-speed impact conditions,benefits from its long molecular chains and few brancbed chains.
机翻摘要
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关键词
ultra-high molecular weightpolyethylene;low-density polyethylene;extruded polyethylene;molecular structure;mechanical behavior;impact
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