探索应变速率对丙烯腈-丁二烯-苯乙烯剪切屈服行为的影响:实验和数值研究

IF 3.6 4区 材料科学 Q2 MATERIALS SCIENCE, COMPOSITES
Mehmet Akif Dundar
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引用次数: 0

摘要

大多数实验和数值研究仅限于探讨应变率对丙烯腈-丁二烯-苯乙烯(ABS)(一种具有重要工业意义的无定形材料)压缩和拉伸屈服行为的影响,而不是其剪切屈服行为;因此,本研究致力于通过探讨应变率对 ABS 剪切屈服行为的影响来填补这一明显的文献空白。为此,我们使用怀俄明版 Iosipescu(V 型缺口)剪切试验夹具在 5 × 10-3 至 1 × 101 mm/s 的五个不同加载速率下进行了剪切试验,对应的应变速率为 5.5 × 10-4 s-1 至 7 × 10-1 s-1。使用数字图像相关(DIC)技术测量了试样中的剪切应变分布。剪切试验结果表明,随着应变速率的增加,ABS 的剪切屈服强度大幅提高,同时还表明,与压缩和拉伸屈服强度相比,ABS 的剪切屈服强度对应变速率更为敏感。研究结果还表明,使用相同应变率下的剪切-拉伸试验数据对确定静水压力敏感性参数比使用拉伸-压缩和剪切-压缩试验数据对更有效。实验结果与采用弹性-粘弹性构成模型进行有限元分析得出的数值预测结果进行了验证,该模型全面考虑了非线性材料特性、几何复杂性以及边界接触产生的非线性问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exploring the strain rate influence on shear yield behavior of acrylonitrile-butadiene-styrene: Experimental and numerical study
Most experimental and numerical studies are limited to examining the effect of strain rate on the compressive and tensile yield behavior of Acrylonitrile-Butadiene-Styrene (ABS), an amorphous material of significant industrial relevance, rather than its shear yield behavior; therefore, this study is dedicated to addressing this notable gap in the literature by exploring the effect of strain rate on the shear yield behavior of ABS. To this end, shear tests were carried out using the Wyoming version of the Iosipescu (V-notched) shear test fixture at five distinct loading rates, ranging from 5 × 10−3 to 1 × 101 mm/s, which correspond to strain rates between 5.5 × 10−4 s−1 and 7 × 10−1 s−1. Shear strain distributions in the specimens were measured using the Digital Image Correlation (DIC) technique. The shear test results not only revealed a substantial increase in the shear yield strength of ABS with increasing strain rate, but also demonstrated that the shear yield strength of ABS is more sensitive to strain rate than its compressive and tensile yield strengths. The findings of the study also suggested that using shear-tension test data pairs at the same strain rates is more effective for determining the hydrostatic pressure sensitivity parameter than using tension-compression and shear-compression test data pairs. The experimental results were validated against numerical predictions obtained through finite element analyses employing an elastic-viscoplastic constitutive model, which comprehensively accounted for non-linear material properties, geometric complexities, and non-linearities arising from boundary contacts.
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来源期刊
Journal of Thermoplastic Composite Materials
Journal of Thermoplastic Composite Materials 工程技术-材料科学:复合
CiteScore
8.00
自引率
18.20%
发文量
104
审稿时长
5.9 months
期刊介绍: The Journal of Thermoplastic Composite Materials is a fully peer-reviewed international journal that publishes original research and review articles on polymers, nanocomposites, and particulate-, discontinuous-, and continuous-fiber-reinforced materials in the areas of processing, materials science, mechanics, durability, design, non destructive evaluation and manufacturing science. This journal is a member of the Committee on Publication Ethics (COPE).
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