Abstract
High-strength carbon/epoxy composites (HSCEC) are known to exhibit comparably high specific strength and stiffness than high-strength steel alloys. Consequently, they have a range of applications in the automotive, aerospace, and ship-building industries But extensive studies on the mechanical properties of HSCECs, especially at the laminate level, are lacking in the literature. This study characterizes the tensile and compressive properties of HSCEC laminates with various uni-directional (UD) and bi-directional (BD) ply sequences. The ply sequence that best combines specific strength and modulus is identified. The effects of fiber volume fraction on load–displacement behavior are analyzed. An increase in the fiber volume fraction increases the stiffness and strength of the laminate but decreases its failure strain. Overall, this study highlights the sensitivity of the specific modulus, specific strength, and percentage elongation of the composite laminates to the stacking sequence and fiber volume fraction.
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