单向复合材料中尺寸对倾斜裂纹的影响

Q4 Chemical Engineering

Applied and Computational Mechanics Pub Date : 2021-09-02 DOI:10.22055/JACM.2020.33481.2234

A. Dönmez

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引用次数: 1

摘要

基于断裂能分析，研究了单向（UD）层压板的断裂和尺寸效应特性。裂纹在倾斜纤维方向上的扩展可能导致不同的能量释放机制。因此，这些类型的失效的尺寸效应行为可能会根据UD复合材料的断裂参数而变化。本研究旨在对纤维相对于加载轴倾斜的UD层进行断裂分析。利用已开发的材料模型进行了数值计算，以预测尺寸效应趋势。采用尺寸效应定律拟合了强度随尺寸增大而减小的规律。准脆性断裂力学的基本原理被证明适用于分析这些类型的结构。结果表明，复合材料结构作为准脆性材料，可以表现出显著的尺寸效应。

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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Size Effect on Inclined Cracking in Unidirectional Composites

The fracture and size effect properties of the unidirectional (UD) laminae were investigated based on the fracture energy analysis. The crack propagations on inclined fiber orientation may result in different energy release mechanisms. Therefore, the size effect behavior of these types of failures may vary according to the fracture parameters of the UD composites. This study aims to develop a fracture analysis of UD plies with inclined fibers relative to the loading axis. A numerical work with a developed material model was conducted to predict the size effect trends. The size effect law was used to fit the strength reduction with increasing size. The fundamentals of the quasibrittle fracture mechanics are shown to be applicable to analyze these types of structures. It is shown that the composite structures as quasibrittle materials, can exhibit a significant size effect.

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来源期刊

Applied and Computational Mechanics Engineering-Computational Mechanics

CiteScore

0.80

自引率

0.00%

发文量

审稿时长

14 weeks

期刊介绍： The ACM journal covers a broad spectrum of topics in all fields of applied and computational mechanics with special emphasis on mathematical modelling and numerical simulations with experimental support, if relevant. Our audience is the international scientific community, academics as well as engineers interested in such disciplines. Original research papers falling into the following areas are considered for possible publication: solid mechanics, mechanics of materials, thermodynamics, biomechanics and mechanobiology, fluid-structure interaction, dynamics of multibody systems, mechatronics, vibrations and waves, reliability and durability of structures, structural damage and fracture mechanics, heterogenous media and multiscale problems, structural mechanics, experimental methods in mechanics. This list is neither exhaustive nor fixed.