Mechanical and Thermal Cycling Behaviour of NiTi and Cu Wire Reinforced E-Glass Epoxy Composites
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Abstract
The four different categories of composites have been fabricated namely pure e-glass reinforced epoxy composite (PEC), nickel-titanium wire reinforced composite (NTEC), copper wire reinforced composite (CEC) and hybrid NiTi-Cu wire reinforced composite (NTCEC) using hand lay-up method in this work. The NiTi and Cu wires were aligned longitudinally in NTEC and CEC, while in NTCEC they were interlaced in a grid pattern to improve stress transfer and crack resistance. Mechanical characterization was carried out through tensile, flexural and impact testing, along with thermal cycling to evaluate strength, stiffness and toughness under varying temperature conditions. The results from all composites were systematically compared to assess the influence of metallic reinforcement. Scanning electron microscopy (SEM) was employed to examine fracture surfaces and identify microstructural defects. Overall, the study highlights the enhanced mechanical reliability and thermal endurance of NTCEC, indicating its potential for aerospace and automotive applications that demand smart structural systems with resistance to repetitive thermal loading.
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