Volume 10, No. 4, November 2022
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Effect of Bending-Twisting Coupled Deformation on Pure Bending Strength and Fracture Morphology of CFRP Angle-Ply Laminate

Kazuki Terasaki1, Kiyotaka Obunai2, Kazuya Okubo3
1.Graduate School of Doshisha University, Kyotanabe, Kyoto, Japan.
2.Department of Mechanical Engineering, Doshisha University, Kyotanabe, Japan.
3.Department of Mechanical Engineering, Doshisha University, Kyotanabe, Japan.
Abstract: The purpose of this study is to investigate the effect of bending-twisting coupled deformation on the bending strength of CFRP in which laminate configuration has symmetricity and angled fiber orientation. In this study, a novel type of test fixture for the pure bending test that permits the coupled bending-twisting deformation is newly developed for the pure bending test. Test results showed that the pure bending strength of the angle-ply laminates was decreased when bending-twisting coupled deformation was permitted. The normalized bending strength when bending-twisting coupled deformation is permitted was decreased with the increase of coupled component of angle-ply laminate. Observations of fracture morphology of specimen also showed that the specimen was firstly failed at the 0° layer on the compression side no matter if the coupled deformation was permitted or constrained. However, when the coupled deformation was permitted, the failure was occurred at lower applied bending stress compared with when coupled deformation was constrained. Moreover, when the coupled deformation was permitted, the failure of the 0° layer has occurred at the diagonal portion of the specimen. These results suggested that the existence of in-plane shear stress at 0° layer affects the fracture morphology of the specimen.

Key words: CFRP, angle-plied laminate, bending-twisting coupling deformation, pure bending, Classical laminate theory

Cite: Kazuki Terasaki, Kiyotaka Obunai, Kazuya Okubo, " Effect of Bending-Twisting Coupled Deformation on Pure Bending Strength and Fracture Morphology of CFRP Angle-Ply Laminate," International Journal of Materials Science and Engineering, Vol. 10, No. 4, pp. 88-95, November 2022. doi: 10.17706/ijmse.2022.10.4.88-95
Copyright © 2022 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

 

General Information

ISSN: 2315-4527 (Print)
Abbreviated Title: Int. J. Mater. Sci. Eng.
Editor-in-Chief: Prof. Emeritus Dato' Dr. Muhammad Yahaya
DOI: 10.17706/ijmse
Abstracting/ Indexing: Ulrich's Periodicals Directory, Google Scholar, Crossref
E-mail: ijmse@iap.org