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Title: Damage accumulation in braided textiles-reinforced composites under repeated impacts : experimental and numerical studies
Authors: Wang, Chen
Chen, Zhong
Silberschmidt, Vadim V.
Roy, Anish
Keywords: Engineering::Materials
Braided Composite
Repeated Low-velocity Impacts
Issue Date: 2018
Source: Wang, C., Chen, Z., Silberschmidt, V. V., & Roy, A. (2018). Damage accumulation in braided textiles-reinforced composites under repeated impacts : experimental and numerical studies. Composite Structures, 204, 256-267. doi:10.1016/j.compstruct.2018.07.084
Series/Report no.: Composite Structures
Abstract: Composites reinforced with braided textiles exhibit high structural stability and excellent damage tolerance, making them very attractive for defence, aerospace, automotive and energy industries. Considering the real-life service environment, it is crucial to study a dynamic response of a composite structure and its energy-dissipation ability, especially under repeated low-velocity impacts. So, a series of drop-weight tests were carried out followed by X-ray computed micro-tomography to characterize damage morphology of braided composite specimens. Meanwhile, a multi-scale computational approach was explored and implemented as a user-defined-material subroutine (VUMAT) for ABAQUS/Explicit to capture main damage modes of a braided textile composite, while its delamination was modelled by employing cohesive-zone elements. Load- and energy-time curves were obtained both experimentally and numerically. The predicted levels of peak forces and absorbed energy were found to agree with the experimental data. An extent of delamination and damage accumulation in the braided composite was predicted numerically and analysed; it was found that material responses to repeated impacts had two types depending on the level of normalised impact energy. The presented modelling capability could contribute to design of braided composite structures for various applications.
ISSN: 0263-8223
DOI: 10.1016/j.compstruct.2018.07.084
Schools: School of Materials Science & Engineering 
Research Centres: Singapore Institute of Manufacturing Technology 
Rights: © 2018 Elsevier Ltd. All rights reserved. This paper was published in Composite Structures and is made available with permission of Elsevier Ltd.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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