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Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29, No. 6, pp.481-488

ISSN: 2508-5093 (Print) 2508-5107 (Online)

Print publication date 15 Dec 2020

Received 21 Oct 2020 Accepted 04 Nov 2020

DOI: https://doi.org/10.7735/ksmte.2020.29.6.481

원통 복합재 쉘의 비선형 좌굴에 의한 파괴현상 연구

조희근^a^{, *}

Fracture Phenomenon of Cylindrical Composite Shell by Nonlinear Buckling

Hee Keun Cho^a^{, *}

aDepartment of Mechanical Engineering Education, Andong National University

Correspondence to: ^*Tel: +82-54-820-5677 E-mail address: hkcho@anu.ac.kr (Hee Keun Cho).

Abstract

A cylindrical shell is a representative structure that exhibits buckling. To investigate the nonlinear behavior of this shell, the arc-length method or load– displacement control Newton–Raphson numerical analysis method is used. In this study, the buckling and post-buckling phenomena of composite shells were investigated, and the fracture phenomena of composites were evaluated for their load–displacement behaviors. Composite buckling is a complex process compared to those of isotropic materials. Moreover, in the case of a laminated composite material, it is difficult to accurately identify the time and place at which a failure might occur because various stress components and interlayer shear stresses interact with each other. Using the arc-length nonlinear numerical analysis method, the failure phenomena were clearly identified along the behavioral path of the composite shell after buckling, and the differences were confirmed via various composite failure theories.

Keywords:

Composite, Buckling, Nonlinear, FEA

Acknowledgments

이 논문은 안동대학교 기본연구지원사업에 의하여 연구되었음.

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Hee Keun Cho

Professor in the Department of Mechanical Engineering, Andong National University.His research interest is computer aided engineering, finite element method, composite materials and design optimization

E-mail: hkcho@anu.ac.kr