DEVELOPMENT AND TESTING OF A QUASI-ISOTROPIC LAMINATE

Author

N. Anvesh, R. Sriraj, B. Shanth Kumar, J. Nagaraju

Abstract

 This study presents the design, fabrication workflow, and preliminary structural analysis of a multi-directional fibre-reinforced polymer laminate. The panel is configured with a 500 mm × 500 mm square geometry and a nominal thickness of 2.5 mm, utilizing a five-ply stacking arrangement defined as [0°/+45°/90°/−45°/0°]. Geometric modeling was carried out using CATIA V5, followed by preliminary finite element modeling in ANSYS Static Structural. The manufacturing process incorporates manual ply lay-up, roller consolidation, and vacuum-bag processing to minimize void content. Static structural analysis under preliminary boundary conditions demonstrated a maximum shear stress of approximately 75.39 MPa and a maximum shear elastic strain of 9.8005 × 10⁻⁴ m/m. Mechanical testing evaluations covering interlaminar shear strength (ILSS), compressive strength, and tensile properties were conducted, yielding average strength values of 37.51 MPa, 138.20 MPa, and 125.24 MPa, respectively. The results highlight the efficacy of multi-angle prepreg consolidation in maintaining uniform stress distribution across structural composite panels.

Keywords

Composite laminate; glass-fibre/epoxy; quasi-isotropic design; ply orientation; vacuum bagging; finite element analysis; mechanical testing.

Full Text:

Download Paper PDF

References

• C. Campbell, Manufacturing Processes for Advanced Composites. Oxford, UK: Elsevier, 2004.
• InternationalJournal of Research Publication and Reviews (IJRPR), "Author Guidelines and Publication Standards," 2026. [Online]. Available: https://ijrpr.com/authorsguide.php
• Anvesh, R. Sriraj, and B. S. Kumar, "Development and Structural Characterization of Quasi-Isotropic CompositeLaminates," Department of Mechanical Engineering, JBIET, Hyderabad, Technical Report, 2026.

Share your valuable work from Social Media Buttons