3D observation of delamination in carbon-fibre-reinforced composites under mode II loading through in situ computed tomography

IF 5.3 Q2 MATERIALS SCIENCE, COMPOSITES
Panayiotis Tsokanas, Thanasis Chatziathanasiou, Yentl Swolfs
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引用次数: 0

Abstract

Delamination is among the most prevalent life-limiting failure modes in laminated composites. Mode II delaminations, driven by in-plane shear loads, are more difficult to observe than mode I delaminations. Conventional edge observation techniques fail to capture the three-dimensional (3D) delamination front and its associated damage mechanisms. We conduct the first in situ X-ray computed tomography (CT) experiment to observe the 3D development of delamination under mode II loading. We apply four-point end-notched flexure loading to two types of thin-ply, carbon-fibre-reinforced composite laminates: a 0° laminate and a cross-ply laminate susceptible to delamination migration. The method is proven capable of capturing delamination growth and migration within the bulk of the laminates at the meso- and microscale, something unattainable using conventional techniques. This work thus demonstrates the benefits of in situ CT in determining the damage mechanisms involved in mode II fracture loading.
通过原位计算机断层扫描观察II型载荷下碳纤维增强复合材料的分层
分层是层压复合材料中最常见的寿命失效模式之一。由面内剪切载荷驱动的II型脱层比I型脱层更难观察。传统的边缘观测技术无法捕捉三维(3D)分层前沿及其相关的损伤机制。我们进行了第一次原位x射线计算机断层扫描(CT)实验,观察II型加载下分层的三维发展。我们将四点端缺口弯曲载荷应用于两种类型的薄层碳纤维增强复合材料层压板:0°层压板和易分层迁移的交叉层压板。该方法已被证明能够在中观和微观尺度上捕获层压板内部的分层生长和迁移,这是传统技术无法实现的。因此,这项工作证明了原位CT在确定II型断裂载荷损伤机制方面的优势。
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
Composites Part C Open Access
Composites Part C Open Access Engineering-Mechanical Engineering
CiteScore
8.60
自引率
2.40%
发文量
96
审稿时长
55 days
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