Composite Structures 185 (2018) 764–773 Contents lists available at ScienceDirect Composite Structures journal homepage: www.elsevier.com/locate/compstruct Identifying the distinct shear wrinkling behavior of woven composite preforms under bias extension and picture frame tests ⁎ ⁎ a,b c a c, b, A. Hosseini , M.H. Kashani , F. Sassani , A.S. Milani , F.K. Ko Department of Mechanical Engineering, University of British Columbia, Vancouver, Canada Advanced Fibrous Materials Laboratory, University of British Columbia, Vancouver, Canada Composites Research Network-Okanagan Laboratory, School of Engineering, University of British Columbia, Kelowna, Canada ARTICLE I NFO ABSTRACT Keywords: An analytical-experimental study of the shear wrinkling behavior of plain woven composite preforms under bias Woven fabric composites extension test (BET) and picture frame test (PFT) is presented. The intentionally induced tension in the PFT has Wrinkling been regarded in a large portion of the literature as the source of delay in fabric wrinkling initiation as compared Multi-scale analysis to the BET. Through this study, however, it is demonstrated that shear within yarns – known as intra-yarn shear – Bias extension test could be another cause of the delayed wrinkling in the PFT, even when the tension level in yarns is kept at zero. Picture frame test To
Composite Structures – Elsevier
Published: Feb 1, 2018
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