An advanced model for initiation and propagation of damage under fatigue loading - part I: Model formulation

Michael May; Stephen R. Hallett

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An advanced model for initiation and propagation of damage under fatigue loading - part I: Model formulation

机译：疲劳载荷下损伤的萌生和传播的高级模型-第一部分：模型制定

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摘要

This paper presents a method for modelling initiation and propagation of damage in composites under fatigue loading in a single, coherent analysis using cohesive interface elements. Damage initiation laws based on SN-curves for initiation are applied to all interface elements within a zone of characteristic length, the so-called initiation zone. The formulation allows for a fully automated identification of the location of the initiation zone as well as automatic extraction of the local severity from the identified interface elements. Once a macroscopic crack has been initiated, it is propagated using damage accumulation laws based on the Paris-law. The formulation has been applied to the Short Beam Shear test and the Double Notched Shear test under fatigue loading. For both tests, good agreement was achieved with experimental data from the literature using an initiation zone length of 3.0 mm.

机译：本文提出了一种方法，该方法通过使用内聚界面元素进行的单个相干分析，对疲劳载荷下复合材料中损伤的引发和扩散进行建模。将基于SN曲线引发的损伤引发定律应用于特征长度区域（即所谓的引发区域）内的所有界面元素。该配方允许对起始区域的位置进行全自动识别，并从所识别的界面元素中自动提取局部严重程度。一旦引发了宏观裂纹，就使用基于巴黎定律的损伤累积定律传播裂纹。该配方已应用于疲劳载荷下的短梁剪切试验和双缺口剪切试验。对于这两个测试，使用3.0 mm的起始区域长度与文献中的实验数据达成了很好的一致性。

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来源
《Composite Structures》 |2011年第9期|p.2340-2349|共10页
作者
Michael May; Stephen R. Hallett;
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作者单位

Advanced Composite Centre for Innovation and Science (ACCIS), Queens Building, University Walk, University of Bristol, Bristol BSS JTR, United Kingdom;

Advanced Composite Centre for Innovation and Science (ACCIS), Queens Building, University Walk, University of Bristol, Bristol BSS JTR, United Kingdom;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
fatigue; interface elements; finite element analysis; failure;

机译：疲劳;接口元素;有限元分析;失败;

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An advanced model for initiation and propagation of damage under fatigue loading - part I: Model formulation

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