Modeling and analyzing the complex deformation of thermoplastic polymers

IF 2.3 3区 材料科学 Q3 MATERIALS SCIENCE, COMPOSITES Journal of Reinforced Plastics and Composites Pub Date : 2024-07-30 DOI:10.1177/07316844241266777
Li Cai, Guangming Zhou, Deng’an Cai, Xinwei Wang
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Abstract

Existing constitutive models rarely considered the effect of transition point from the strain-softening phase to the strain-hardening phase. In this paper, a new phenomenological model is proposed. The model introduces a transition optimization factor to take the effect of the transition point into consideration. The tensile and compressive deformations under different loading conditions are analyzed separately and compared with the results of the DSGZ (Duan-Saigal-Greif-Zimmerman) model. The results indicate that the proposed model is more accurate than the DSGZ model in analyzing the post-yield deformation that possesses a significant transition section. Based on the new stress-strain updating algorithm, a VUMAT subroutine was written for cyclic compression simulations. Comparing with the simulation data of DSGZ model, the proposed model effectively describes the hysteresis loop in the cyclic process. This indicates that the proposed model is more capable of analyzing complex deformations of thermoplastic polymers. Meanwhile, compared with the primal algorithm, the new stress-strain updating algorithm improves the analytical accuracy of the proposed model for the unloading and reloading phases.
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热塑性聚合物复杂变形建模与分析
现有的构成模型很少考虑从应变软化阶段到应变硬化阶段过渡点的影响。本文提出了一种新的现象学模型。该模型引入了过渡优化因子,以考虑过渡点的影响。分别分析了不同加载条件下的拉伸和压缩变形,并与 DSGZ(Duan-Saigal-Greif-Zimmerman)模型的结果进行了比较。结果表明,在分析具有明显过渡段的屈服后变形时,所提出的模型比 DSGZ 模型更为精确。根据新的应力应变更新算法,编写了用于循环压缩模拟的 VUMAT 子程序。与 DSGZ 模型的模拟数据相比,所提出的模型有效地描述了循环过程中的滞后环。这表明所提出的模型更能分析热塑性聚合物的复杂变形。同时,与原始算法相比,新的应力应变更新算法提高了所提模型在卸载和重载阶段的分析精度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Reinforced Plastics and Composites
Journal of Reinforced Plastics and Composites 工程技术-材料科学:复合
CiteScore
5.40
自引率
6.50%
发文量
82
审稿时长
1.3 months
期刊介绍: The Journal of Reinforced Plastics and Composites is a fully peer-reviewed international journal that publishes original research and review articles on a broad range of today''s reinforced plastics and composites including areas in: Constituent materials: matrix materials, reinforcements and coatings. Properties and performance: The results of testing, predictive models, and in-service evaluation of a wide range of materials are published, providing the reader with extensive properties data for reference. Analysis and design: Frequency reports on these subjects inform the reader of analytical techniques, design processes and the many design options available in materials composition. Processing and fabrication: There is increased interest among materials engineers in cost-effective processing. Applications: Reports on new materials R&D are often related to the service requirements of specific application areas, such as automotive, marine, construction and aviation. Reports on special topics are regularly included such as recycling, environmental effects, novel materials, computer-aided design, predictive modelling, and "smart" composite materials. "The articles in the Journal of Reinforced Plastics and Products are must reading for engineers in industry and for researchers working on leading edge problems" Professor Emeritus Stephen W Tsai National Sun Yat-sen University, Taiwan This journal is a member of the Committee on Publication Ethics (COPE).
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