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Stress Concentration in Laminated Composites With a Central Circular Hole Under Biaxial Load

[+] Author Affiliations
Zhong Hu, Fereidoon Delfanian

South Dakota State University

Paper No. IMECE2005-79550, pp. 703-711; 9 pages
doi:10.1115/IMECE2005-79550
From:
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Design Engineering, Parts A and B
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Design Engineering Division
  • ISBN: 0-7918-4215-0 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME

abstract

The anisotropic nature of the laminate composites creates a unique opportunity and also a great challenge for tailoring its properties according to the design requirements. In this work investigating the strength of laminate composite, a nonlinear finite element analysis was used to simulate the stress concentration in a two dimensional element caused by a central circular hole subjected to the biaxial loading. The effects of elastic and plastic deformation of a metallic material, fiber orientation and stacking order of a laminated composite on stress concentration were investigated. This evaluation provides a clear indication and a key step in understanding failures initiated by stress concentration which may lead to the growth of a crack. Comparison between the effects of the hole both on a metallic material and on a fiber-reinforced laminate exposes a totally different situation. In general, the stress concentration depends largely on the material properties, the layer stacking order, and the orientation.

Copyright © 2005 by ASME

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