Material parameter sensitivity analysis for intralaminar damage of laminated composites through direct differentiation

IF 4.4 2区工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computers & Structures Pub Date : 2024-11-16 DOI:10.1016/j.compstruc.2024.107584

P. Minigher , A. Arteiro , A. Turon , J. Fatemi , L. Barrière , P.P. Camanho

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引用次数: 0

Abstract

Understanding the effect of the material parameters variability on the mechanical response of laminated composites is of great importance for many engineering problems. Not only an accurate sensitivity analysis enables to estimate how much each parameter under consideration affects the response, but the linearization of the output provides also the possibility to, for example, use gradient-based optimization tools and to propagate in an inexpensive way the material uncertainties. In this paper, a material parameter sensitivity study is carried out in the context of continuum damage mechanics applied to predict intralaminar damage in laminated composites. The sensitivity w.r.t. the input material variables is estimated in a relatively inexpensive way from a single run of the Finite Element (FE) model. The results obtained provide a good understanding of the influence of the material parameters throughout the simulation.

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通过直接微分法分析层状复合材料层内损伤的材料参数敏感性

了解材料参数变化对层压复合材料机械响应的影响对许多工程问题都非常重要。准确的灵敏度分析不仅可以估算出所考虑的每个参数对响应的影响程度，而且输出的线性化还为使用基于梯度的优化工具和以低成本的方式传播材料不确定性等提供了可能性。本文以连续损伤力学为背景，进行了材料参数敏感性研究，用于预测层状复合材料的层内损伤。通过有限元（FE）模型的一次运行，以相对低成本的方式估算了输入材料变量的敏感性。所获得的结果可以很好地理解材料参数在整个模拟过程中的影响。

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

Computers & Structures 工程技术-工程：土木

CiteScore

8.80

自引率

6.40%

发文量

122

审稿时长

33 days

期刊介绍： Computers & Structures publishes advances in the development and use of computational methods for the solution of problems in engineering and the sciences. The range of appropriate contributions is wide, and includes papers on establishing appropriate mathematical models and their numerical solution in all areas of mechanics. The journal also includes articles that present a substantial review of a field in the topics of the journal.