Effect of Ply Lay Up Sequence on Interlaminar Shear Strength of Symmetric and Asymmetric GFRP Composite

• Main Authors: Kumar, Dilip, Singh, K.K, Touhid Alam Ansari, Md
• Format: Conference Proceeding
• Language: English
• Subjects: Asymmetric laminates; GFRP; ILSS; Symmetric laminates; Volume fraction
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2020.03.344

Fibre reinforcement polymer matrix composite are being used in aerospace, aircraft, and automobile industry etc .These material has high strength, high modulus and low density. Woven Fibres used is in experiment. Reinforcement throughout thickness is better in woven fibres and it show similar properties in warp and weft direction. The composite material properties like load carrying capacity ,stiffness, ILSS etc. is affected by ply orientation and stacking sequence of laminate. Asymmetric laminates have almost similar stiffness characteristics properties to that of symmetric laminates. Symmetric and asymmetric laminate were fabricated by hand layup press moulding process. In the concerned method initially cut plies are wetted by the resin and are placed over each other according to the required stacking sequence. Once the proper layup is achieved, the wet laminate is squeezed under press moulding machine. The magnitude of load defines the final thickness of the laminate. Final thickened laminates’ samples were tested on fully computer controlled universal testing machine using short beam strength method and with the help of ASTM- 2344 ILSS was calculated. This paper show the effect of ply layup sequence on interlaminar shear strength on symmetric and asymmetric laminates of GFRP composite and it was found that interlaminar shear stress is higher for symmetric laminates that of asymmetric laminates. It was also observed that interlaminar shear stress decreases as fibre volume fraction in laminates increases.