Probabilistic strength estimation analysis of composites considering cross-correlated random fields of local strength and apparent elastic properties

IF 2.6 4区工程技术 Q3 MECHANICS

Mechanics Research Communications Pub Date : 2026-03-01 Epub Date: 2026-01-13 DOI:10.1016/j.mechrescom.2026.104628

Sei-ichiro SAKATA , George STEFANOU , Kazuto SHIRAHAMA , Seiji ONO

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引用次数: 0

Abstract

This paper is focused on the strength analysis of composite materials and structures considering the heterogeneity of their microstructure. The apparent stiffness and strength properties of composites are significantly affected by the microscopic heterogeneity and randomness, and this influence on the apparent properties of composite structures should be evaluated. In particular, the geometrical randomness in microstructure has a significant influence on the microscopic stress and fracture state, and thus should be appropriately taken into account in the strength estimation of composite structures.

In this work, a multiscale numerical analysis considering microscopic heterogeneity, randomness, and their spatial distribution is discussed. The moving window method-based approach is employed for random field modeling, and finite element-based microscopic fracture analysis is performed for the local apparent strength estimation of composites considering the random microstructure morphologies. The identified probabilistic properties are introduced into the multiscale probabilistic strength analysis of composite structures, and in addition, the influence of correlation between the local apparent elastic property and strength on the estimated apparent strength of composite structures is investigated.

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考虑局部强度和表观弹性特性互相关随机场的复合材料概率强度估计分析

本文主要针对复合材料及其组织的非均质性进行强度分析。微观非均质性和随机性对复合材料的表观刚度和强度性能有显著影响，应对复合材料结构的表观性能进行评价。特别是微观结构的几何随机性对微观应力和断裂状态有显著影响，在复合材料结构强度估计中应予以适当考虑。本文讨论了考虑微观异质性、随机性及其空间分布的多尺度数值分析方法。采用基于移动窗口法的随机场建模方法，基于有限元的细观断裂分析方法对考虑随机微观形貌的复合材料进行局部视强度估计。将识别出的概率特性引入到复合材料结构的多尺度概率强度分析中，研究了复合材料结构局部表观弹性特性与强度之间的相关性对复合材料结构表观强度的影响。

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

Mechanics Research Communications 物理-力学

CiteScore

4.10

自引率

4.20%

发文量

114

审稿时长

9 months

期刊介绍： Mechanics Research Communications publishes, as rapidly as possible, peer-reviewed manuscripts of high standards but restricted length. It aims to provide: • a fast means of communication • an exchange of ideas among workers in mechanics • an effective method of bringing new results quickly to the public • an informal vehicle for the discussion • of ideas that may still be in the formative stages The field of Mechanics will be understood to encompass the behavior of continua, fluids, solids, particles and their mixtures. Submissions must contain a strong, novel contribution to the field of mechanics, and ideally should be focused on current issues in the field involving theoretical, experimental and/or applied research, preferably within the broad expertise encompassed by the Board of Associate Editors. Deviations from these areas should be discussed in advance with the Editor-in-Chief.