Influence of Ply Arrangement on Failure Criteria in Fibre-Reinforced Composite Laminates using ACP Pre-Simulation, Numerical Assessment

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Abstract
Fiber-reinforced composites (FRCs) are among the most widely used materials in modern engineering applications due to their high mechanical properties and light weight. The current study involved a numerical investigation conducted through experimental a validation process using ANSYS Workbench R18.0 to evaluate the mechanical behavior and failure mechanism of (Carbon/Epoxy UD Prepreg). The modelling process was initiated using ACP-PRE to crate four types of laminate structures: balanced cross ply, symmetric, and random. The current model demonstrated an acceptable range of reliability and accuracy to investigate different laminate structures, with a validation error percentage of less than 8% and 13% for both static and explicit analysis. From the study, it has been concluded that the cross-ply layer structure has the highest ultimate stress, reaching 1911.2 MPa, while the random laminate structure has almost 80% in tensile strength reduction. A 700 MPa ultimate tensile stress was obtained for the cross-ply type, although the balanced laminate exhibited a weaker load response, 30 % lower than the cross-ply. Moreover, the laminate configuration of cross-ply stands as the best option in terms of reverse factor, which indicates a value of 6.7, and the highest energy of strain reached 1.5123 with 46% higher safety margin. As a result, this configuration is suggested to be the best combination and capability for the safety structure and energy absorption. These findings highlight the critical role of ply arrangement in enhancing the mechanical integrity of composite structures and support the need for deliberate design strategies in laminate engineering. Moreover, the current paper suggests ACP Pre (Advanced Composite Pre-processor) as an effective tool for simulating composite materials with layered structures.

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