Abstract
Structural vibration induced by dynamic load or natural vibration is a non-negligible factor in failure analysis. Based on a vibrating boundary condition, the impact resistance of shape memory alloy (SMA)-reinforced composites was investigated. In this investigation, a modified Hashin’s failure criterion, Brinson’s model, and a visco-hyperelastic model were implemented into a numerical model to characterize the mechanical behavior of glass fiber/epoxy resin laminates, SMAs, and interphase, respectively. First, a fixed boundary condition was maintained in the simulation to verify the accuracy of the material parameters and procedures by a comparison with experimental data. Then, a series of vibrating boundaries with different frequencies and amplitudes was applied during the simulation process to reveal the effect on impact resistances. The results indicate that the impact resistance of the composite under a higher frequency or a larger amplitude is lower than that under a lower frequency or a smaller amplitude.
Highlights
Fiber-reinforced composite materials have been widely used and investigated in recent years due to their unique properties, such as high stiffness, high strength, and low density [1]
Delamination between adjacent layers and debonding between the fiber and the matrix have contributed to the evolution of damage in composites, and this can be explained by the weak interfacial properties [2]
The results indicate that the tensile strength of samples machined perpendicular to the mould flow direction (MFD) are nearly 40% lower than that of samples machined parallel to the MFD
Summary
Fiber-reinforced composite materials have been widely used and investigated in recent years due to their unique properties, such as high stiffness, high strength, and low density [1]. Delamination between adjacent layers and debonding between the fiber and the matrix have contributed to the evolution of damage in composites, and this can be explained by the weak interfacial properties [2] This disadvantage can be overcome by changing the structure of the material; e.g., using a short fiber instead of a long fiber. Shariyat et al [15,16] have developed a higher-order global–local hyperbolic plate theory aimed at studying the asymmetric displacement fields Their calculations indicate that SMAs have the ability to change shape, to repair damage, and to improve the impact resistance property of composites [15,16]. In Pérez’s work, damage to a carbon fiber reinforced polymer (CFRP) induced by a low-velocity impact, and its effect on the vibration response, was investigated by a micro-mechanical approach [31]. The effect of vibration on the impact resistance of SMA-reinforced composites is investigated through a series of frequencies and amplitudes
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