Analysis of necking and neck propagation in polymeric materials
Analysis of necking and neck propagation in polymeric materials
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DOI：
10.1016/0022-5096(85)90032-8
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发表时间：
1985
影响因子：
5.3
通讯作者：
K. Neale;P. Tuǧcu
中科院分区：
文献类型：
--
作者：
K. Neale;P. Tuǧcu
用数值方法分析了圆柱拉伸试样在聚合物“冷拔”过程中观察到的颈缩现象和颈缩现象。采用有限元法结合hill（1958, 1959）变分原理计算了杆的整个荷载-变形历史。假定材料的弹塑性行为与速率无关。结果给出了杆的整体荷载-伸长响应，以及试件轮廓的演变和杆在变形过程的各个阶段的应力和应变分布。我们的结果对用于分析聚合物张力数据的常规方法的影响也进行了讨论。
Neckingand neck propagation as observed in polymers which “cold draw” is analyzed numerically for a circular cylindrical tensile specimen. The entire load-deformation history of the bar is computed using the finite element method in conjunction with hill's (1958, 1959) variational principle. Rate-independent elastic-plastic material behaviour is assumed.Results are given for the overall load-elongation response of the bar, as well as for the evolution of the specimen profile and the stress and strain distributions in the bar at various stages of the deformation process. The implications of our results on conventional methods used to analyze tension data for polymers are also discussed.