基于热粘超弹模型的复杂几何体热成型过程建模

IF 3.3 Q2 ENGINEERING, MANUFACTURING
Ameni Ragoubi, Guillaume Ducloud, Alban Agazzi, Patrick Dewailly, Ronan Le Goff
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引用次数: 0

摘要

热成型工艺通常用于工业领域,利用预挤压聚合物片材制造轻质薄壁产品。目前已开发出许多模拟工具,利用计算机工具对该工艺进行模拟和优化。试验机的开发简化了这类工艺的模拟,使研究人员能够描述材料在不同温度下的行为,并使大变形更接近工艺的实际条件。本文介绍了一项关于热成型工艺建模的研究成果,研究对象是一种由高抗冲聚苯乙烯(HIPS)聚合物制成的工业示范品。HIPS 的机械性能取决于温度和应变率。在这种条件下,使用 ABAQUS/Explicit 建立了一个热超粘弹性结构模型来复制工业示范装置的热成型过程。该模型的行为是通过各种实验测试确定的:不同温度和应变率下的单轴拉伸测试以及动态机械分析(DMA)。针对薄膜厚度的演变,对数值结果和实验结果进行了比较。论文最后讨论了未来使用 Abaqus 对热成型过程进行模拟时可能需要考虑的改进,该过程在接触和材料建模方面面临着复杂的挑战。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Modeling the Thermoforming Process of a Complex Geometry Based on a Thermo-Visco-Hyperelastic Model
The thermoforming process is commonly used in industry for the manufacturing of lightweight, thin-walled products from a pre-extruded polymer sheet. Many simulations have been developed to simulate the process and optimize it with computer tools. The development of testing machines has simplified the simulation of this type of process, allowing researchers to characterize the behavior of the material at different temperatures and for large deformation to be closer to the real conditions of the process. This paper presents the results of a study on the modeling of the thermoforming process for an industrial demonstrator made from a high-impact polystyrene (HIPS) polymer. The HIPS shows a mechanical behavior that depends on the temperature and strain rate. In such conditions, a thermo-hyper-viscoelastic constitutive model is used to replicate the thermoforming process of the industrial demonstrator using ABAQUS/Explicit. Its behavior is determined via various experimental tests: uniaxial tensile tests at different temperatures and strain rates and Dynamic Mechanical Analysis (DMA). A comparison between the numerical and experimental results is carried out for the evolution of film thickness. The paper concludes with a discussion of possible improvements to be considered for future simulations of the thermoforming process using Abaqus, which presents complex challenges in terms of contact and material modeling.
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来源期刊
Journal of Manufacturing and Materials Processing
Journal of Manufacturing and Materials Processing Engineering-Industrial and Manufacturing Engineering
CiteScore
5.10
自引率
6.20%
发文量
129
审稿时长
11 weeks
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