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首页> 外文期刊>Journal of Applied Polymer Science >Integrated simulations of structural performance, molding process, and warpage for gas-assisted injection-molded parts. I. Analysis of part structural performance
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Integrated simulations of structural performance, molding process, and warpage for gas-assisted injection-molded parts. I. Analysis of part structural performance

机译：气体辅助注射成型零件的结构性能，成型工艺和翘曲的集成模拟。一，零件结构性能分析

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Whether it is feasible to perform an integrated simulation for structural analysis, process simulation, as well as warpage calculation based on a unified CAE model for gas-assisted injection molding (GAIM) is a great concern. In the present study, numerical algorithms based on the same finite element mesh used for process simulation were developed to simulate the bending performance of gas-assisted injection-molded parts. Polystyrene and nylon plates designed with five different channel geometries were gas-assisted injection-molded. Part flexible strength was measured via bending tests. It was found that part stiffness basically increases linearly with the inertia moment of the plate. Gas channel design results in part structural reinforcement by introducing an additional moment of inertia determined by the shape and the dimension of the channel section as well as the hollowed-core geometry. An analysis algorithm based on VRT/DKT elements superimposed over beam elements representing gas channels of various section geometries was developed to evaluate part bending behavior. An equivalent diameter was assigned to the beam element so that both the original gas channel and the circular beam have the same moment of inertia. The simulated results were also verified with ANSYS 3-D and 2 1/2-D analysis. The simulations show reasonable accuracy as compared with measured results and predictions from ANSYS. This investigation indicates that it may be feasible to achieve an integrated simulation for GAIM under one CAE model, resulting in great computational efficiency for industrial application. (C) 1998 John Wiley & Sons, Inc. [References: 21]
机译：基于气体辅助注射成型（GAIM）的统一CAE模型进行结构分析，过程模拟以及翘曲计算的集成模拟是否可行，是一个令人关注的问题。在本研究中，开发了基于相同有限元网格的数值算法，用于过程仿真，以模拟气体辅助注塑件的弯曲性能。将具有五种不同通道几何形状的聚苯乙烯和尼龙板进行气体辅助注射成型。零件的挠曲强度通过弯曲试验测量。发现零件刚度基本上随着板的惯性矩线性增加。气体通道设计通过引入由通道段的形状和尺寸以及空心几何形状确定的附加惯性矩来导致零件结构的增强。开发了一种基于VRT / DKT元素叠加在表示各种截面几何形状的气体通道的梁元素上的分析算法，以评估零件的弯曲行为。将等效直径分配给梁单元，以使原始气体通道和圆形梁具有相同的惯性矩。仿真结果还通过ANSYS 3-D和2 1 / 2-D分析进行了验证。与ANSYS的测量结果和预测相比，仿真显示出合理的精度。这项研究表明，在一个CAE模型下实现GAIM的集成仿真可能是可行的，从而为工业应用带来了很高的计算效率。 （C）1998 John Wiley＆Sons，Inc. [参考：21]

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