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Finite element guidelines for simulation of fibre-tension dominated failures in composite materials validated by case studies

机译:案例研究验证了模拟复合材料中纤维张力主导失效的有限元准则

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摘要

This paper presents a finite element modelling methodology to predict the initiation and damage progression in notched composite laminated plates subjected to increasing in-plane tension load. An important feature of the methodology is it does not rely on customized user-subroutines but solely on the analysis capabilities of the general purpose software Abaqus; thus ensuring that the numerical results can be universally reproduced. The methodology presented copes with intralaminar failure modes and uses the Hashin failure criterion to predict the onset of failure (cracking). To account for damage progression after crack initiation there is a fracture energy calculated for each of four failure modes. Four open-hole laminated plates taken from the literature are used for benchmark examples. The predicted ultimate strength based on the analytically-obtained stress-displacement curve was found to be within 10% of the experimental observations. To study the influence of the interaction of having two or three holes across the mid-plane of a pultruded open-hole tension specimen, a parametric study was carried out. The paper ends giving guidelines for the generalized modelling methodology using Abaqus without user-subroutines.
机译:本文提出了一种有限元建模方法,以预测承受平面内拉伸载荷增加的带槽复合叠层板的起爆和损伤进展。该方法的一个重要特征是它不依赖于定制的用户子例程,而仅依赖于通用软件Abaqus的分析能力。从而确保数值结果可以被普遍再现。该方法论提出了应对层内失效模式的方法,并使用Hashin失效准则来预测失效的发生(破裂)。为了说明裂纹萌生后的破坏进展,需要为四种失效模式中的每一种计算断裂能。取自文献的四个裸眼层压板用作基准示例。发现基于分析获得的应力-位移曲线的预测极限强度在实验观察值的10%以内。为了研究拉挤裸眼拉力试样中平面有两个或三个孔的相互作用的影响,进行了参数研究。本文最后给出了使用Abaqus而不使用用户子例程的通用建模方法的指南。

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