Effect of Variable Fiber Spacing on Post-Buckling of Boron/Epoxy Fiber Reinforced Laminated Composite Plate

Abstract:

The primary objective of research is to determine the improved structural efficiency of plates can be with variable fiber spacing. The Post-buckling of laminated composite plate with variable fiber spacing is obtained numerically, using eight node isoparametric quadrilateral elements (serendipity element) with five degree of freedom per node. The mathematical formulation is based on first-order shear deformation theory and von-Karman non-linearity. The effect of the initial geometric imperfection, fiber spacing, orientation fiber, and direction of in-plane loading were considered. Numerical results for boron/Epoxy fiber reinforced laminates are presented for the different effects of the composite plate under in-plane loading. This study showed that the post buckling behavior of composite plate very sensitive for type of distribution fiber and the seventh distribution equation gives maximum buckling load and smallest deformation.

• Periodical: Applied Mechanics and Materials (Volume 245)
• Pages: 126-131
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.245.126
• Online since: December 2012
• Authors: Ali I. Al-Mosawi
• Keywords: Composite Laminated, Fiber Spacing, Post-Buckling Behavior

References

[1] Sheh-Yao Kuo, and Le-Chung Shiau, "Buckling and vibration of composite laminated plates with variable fiber spacing", Composite Structures, Vol.90,No.3, 2009, p.196–200.

DOI: 10.1016/j.compstruct.2009.02.013

[2] Martin AF, and Leissa AW. "Application of the Ritz method to plane elasticity problems for composite sheets with variable fiber spacing", Int. J. Numer. Methods Eng.,Vol.28, No.(8),1989, p.1813–1825.

DOI: 10.1002/nme.1620280808

[3] Leissa AW, and Martin AF. "Vibration and buckling of rectangular composite plates with variable fiber spacing", Compos. Struct.,Vol.14, No.4, 1990, p.339–57.

DOI: 10.1016/0263-8223(90)90014-6

[4] Leissa AW, Martin AF. "Some exact plane elasticity solutions for nonhomogeneous, orthotropic sheets", J Elastic ,Vol.23, No.1, 1990, p.97–112.

DOI: 10.1007/bf00041686

[5] Shiau LC, and Chue YH. "Free-edge stress reduction through fiber volume fraction variation", Compos. Struct.,Vol.19,No.2, 1991,p.107–205

DOI: 10.1016/0263-8223(91)90020-y

[6] Shiau LC, and Lee GC, "Stress concentration around holes in composite laminates with variable fiber spacing",Compos Struct.,Vol.24,No.2,1993, pp.107-115.

DOI: 10.1016/0263-8223(93)90032-l

[7] Ammash, H. K., "Nonlinear Static and Dynamic Analysis of Laminated Plates Under In-lane Forces", Ph.D. Thesis, Engineering College ,University of Babylon, Iraq, 2008.