Modeling the viscoelastic compaction response of 3D woven fabrics for liquid composite molding processes

Article


Khan, Kamran A. and Umer, Rehan. 2017. "Modeling the viscoelastic compaction response of 3D woven fabrics for liquid composite molding processes." Journal of Reinforced Plastics and Composites. 36 (18), pp. 1299-1315. https://doi.org/10.1177/0731684417707263
Article Title

Modeling the viscoelastic compaction response of 3D woven fabrics for liquid composite molding processes

ERA Journal ID4945
Article CategoryArticle
AuthorsKhan, Kamran A. (Author) and Umer, Rehan (Author)
Journal TitleJournal of Reinforced Plastics and Composites
Journal Citation36 (18), pp. 1299-1315
Number of Pages17
Year2017
PublisherSAGE Publications Ltd
Place of PublicationUnited Kingdom
ISSN0731-6844
1530-7964
Digital Object Identifier (DOI)https://doi.org/10.1177/0731684417707263
Web Address (URL)http://journals.sagepub.com/doi/10.1177/0731684417707263
Abstract

In liquid composite molding processes, the compaction characterization of fibrous reinforcements plays a key role in determining the thickness, fiber volume content, and part shape. This study presents detailed experimental and modeling work to study the viscoelastic compaction response of three different types of 3D woven carbon fiber reinforcements, namely, orthogonal, angle interlock, and layer-to-layer, each having a different weave style and z-binder yarn pattern. For all reinforcements, single-step, multistep and cyclic compaction experiments were conducted. A nonlinear viscoelastic model is presented that accounts for large deformations and viscous effects, to capture the response of the material under various loading histories. Model verification is also presented to capture each response with separate sets of material parameters. Parametric studies are also performed to analyze the role of model parameters on the response of different types of loadings. X-ray computed tomography analysis showed significant permanent deformation of z-binder yarns through the thickness of the reinforcements. The comparison of modeling results with the experimental data show that the model is able to capture the stress decay after multiple compaction cycles, yet needs further investigations to predict complete cyclic hysteresis. However, model results agree reasonably well with the single and multistep compaction loading.

KeywordsLiquid composite molding, compaction response, 3D woven fabrics, stress relaxation, viscoelasticity
ANZSRC Field of Research 2020401602. Composite and hybrid materials
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Institution of OriginUniversity of Southern Queensland
Byline AffiliationsKhalifa University, United Arab Emirates
Centre for Future Materials
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