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Semi-Crystalline Polymers Applied to Taylor Impact Test: Constitutive Experimental and FEM Analysis

机译：施用于泰勒冲击试验的半结晶聚合物：组成型实验和有限元分析

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摘要

Based on mechanical properties of Polyamide 66 (PA66) under complex loading conditions, a Drucker–Prager yield criterion was employed to characterize its yield behavior. Then, a one-dimensional model, which contains a viscoelastic regime and a viscoplastic regime, was introduced and converted into a three-dimensional constitutive model. The three-dimensional model was implemented into a LS-DYNA software, which was used to predict the dynamic response of PA66 under Taylor impact conditions, whose corresponding tests were conducted by gas gun and recorded by high-speed camera. By contrasting the simulation results and these of the corresponding tests, the deformed shapes including the residual length, the maximum diameter and the shape of the mushroom head of the PA66 bars were found to be similar to these obtained from the tests, which verified the accuracy of the three-dimensional constitutive model, and proved that the model was able to be applied to high-rate impact loading conditions.
机译：基于聚酰胺66（PA66）在复杂的负载条件下的机械性能，采用DRUCKER-PRAGER屈服标准来表征其产量行为。然后，引入含有粘弹性状态和粘液状态的一维模型并转换成三维本构模型。三维模型被实施为LS-DYNA软件，其用于预测泰勒冲击条件下PA66的动态响应，其相应的试验由气枪进行并被高速相机记录。通过对比模拟结果和这些相应的测试的仿真结果，发现包括剩余长度，最大直径和PA66条的蘑菇头的变形形状类似于从测试中获得的那些，这验证了精度在三维本构模型中，证明了该模型能够应用于高速冲击载荷条件。

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