Failure analysis of a laminated composite beam subjected to uniformly distributed load and thermal load is studied for different boundary conditions and fiber orientation angles, based on first ply failure load. Three different boundary conditions are studied: simply supported, fixed-fixed and fixed-free. The strength ratio is computed and compared for different failure theories. The effect of fiber orientation angle and aspect ratio on the strength ratio based on first ply failure load is presented in the paper. The strength ratio and transverse deflection are determined for Graphite/Epoxy and Glass/Epoxy composite and their hybrid combinations to find out the optimum hybrid composite beam with minimum weight, deflection and cost. The problem is solved in MATLAB platform. The mode of failure of the composite beam is determined by using maximum stress theory.
If the inline PDF is not rendering correctly, you can download the PDF file here.
 Borkar R.R., Sayyad A.S. and Ghumare S.M. (2013): Assessment of refined beam theories for the bending analysis of composite beam. – International Journal of Advanced Technology In Civil Engineering, pp.2231-5721, vol.2, No.1, pp.73-78.
 Trung-Kien Nguyen, Ngoc-Duong Nguyen, Thuc P. Vo b,d and Huu-Tai Thai (2017): Trigonometric-series solution for analysis of laminated composite beams. – Composite Structures, vol.160, pp.142-151.
 Atteshamuddin S. Sayyad and Yuwaraj M. Ghugal (2017): Bending, buckling and free vibration of laminated composite and sandwich beams: A critical review of literature. – Composite Structures, vol.171, pp.486-504.
 Meng M., Le H.R., Rizvi M.J. and Grove S.M. (2015): 3D FEA modelling of laminated composites in bending and their failure mechanisms. – Composite Structures, vol.119, pp.693-708.
 Autar K. Kaw (2006): Mechanics of composite materials. Second edition. – Taylor and Francis.
 Reddy J.N. (1997): Mechanics of laminated composite plate and shells- theory and analysis. – Second edition, CRC Press.
 Timoshenko and Krieger (1959): Theory of plates and shells. Second edition. – Mc-Graw Hill.