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An investigation into mechanical properties of jute–polyester laminates for numerical prediction of strength and failure
Polymer Composites ( IF 4.8 ) Pub Date : 2021-09-05 , DOI: 10.1002/pc.26278
Muthuthevar Ramamoorthy Karthika 1 , Anindya Deb 1 , Gude Subbaraya Venkatesh 2
Affiliation  

The study of natural fiber–based composites, which are being seen as a potential eco-friendly alternative to popular synthetic fiber–reinforced composites, has, of late, gained considerable momentum. Replacing the latter composites is, however, an uphill task especially for advanced mechanical and structural engineering applications, which often require assessment of behaviors of materials and components numerically till failure. An implied scenario, for example, would be to design automotive body components using natural fiber–reinforced composites of sufficient strength for meeting crashworthiness requirements. In the current study, bi-directionally woven jute fabric, due to its established supply base and consistent quality, has been chosen along with a general purpose polyester resin for fabrication of laminates of high fiber volume fraction obtained by combining the hand layup method with compression molding. A detailed and comprehensive mechanical characterization includes, for the first time, determination of tensile, compressive, shear, and flexural behaviors of jute–polyester laminates in a single unified study. The consistency of the generated mechanical properties, including deployment of secant moduli instead of conventional initial tangent moduli, in a finite element constitutive model is established by predicting the test-based stress–strain or load–displacement behaviors and failure modes using a commercially available explicit nonlinear dynamic analysis code viz. LS-DYNA.

中文翻译:

黄麻-聚酯层压板力学性能的研究,用于强度和失效的数值预测

天然纤维基复合材料的研究被视为流行的合成纤维增强复合材料的潜在环保替代品,最近获得了相当大的动力。然而,替换后一种复合材料是一项艰巨的任务,尤其是对于高级机械和结构工程应用而言,这通常需要对材料和组件的行为进行数值评估,直到失效。例如,一个隐含的场景是使用具有足够强度的天然纤维增强复合材料来设计汽车车身部件,以满足耐撞性要求。在目前的研究中,双向编织的黄麻面料,由于其已建立的供应基础和一致的质量,已选择与通用聚酯树脂一起用于制造通过将手糊法与压缩成型相结合而获得的高纤维体积分数的层压板。详细而全面的机械特性包括首次在单一的统一研究中确定黄麻-聚酯层压板的拉伸、压缩、剪切和弯曲行为。通过使用市售的显式模型预测基于测试的应力-应变或载荷-位移行为和失效模式,建立有限元本构模型中生成的机械特性的一致性,包括使用割线模量而不是传统的初始切线模量非线性动力分析代码。LS-DYNA。详细而全面的机械特性包括首次在单一的统一研究中确定黄麻-聚酯层压板的拉伸、压缩、剪切和弯曲行为。通过使用市售的显式模型预测基于测试的应力-应变或载荷-位移行为和失效模式,建立有限元本构模型中生成的机械特性的一致性,包括使用割线模量而不是传统的初始切线模量非线性动力分析代码。LS-DYNA。详细而全面的机械特性包括首次在单一的统一研究中确定黄麻-聚酯层压板的拉伸、压缩、剪切和弯曲行为。通过使用市售的显式模型预测基于测试的应力-应变或载荷-位移行为和失效模式,建立有限元本构模型中生成的机械特性的一致性,包括使用割线模量而不是传统的初始切线模量。非线性动力分析代码。LS-DYNA。包括部署割线模量而不是传统的初始切线模量,在有限元本构模型中,通过使用商用显式非线性动态分析代码预测基于测试的应力-应变或载荷-位移行为和失效模式,即建立有限元本构模型。LS-DYNA。包括部署割线模量而不是传统的初始切线模量,在有限元本构模型中,通过使用商用显式非线性动态分析代码预测基于测试的应力-应变或载荷-位移行为和失效模式,即建立有限元本构模型。LS-DYNA。
更新日期:2021-11-09
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