Numerical simulation of dynamic impact of carbon fiber reinforced PEEK material
Focusing on evaluating the mechanical properties of polyetherketone(PEEK)composites reinforced with varying levels of carbon fiber(CF)when subjected to dynamic impact loading.To accomplish this,a progressive damage model utilizing the VUMAT subroutine within the ABAQUS finite element analysis software was developed.This model was coupled with the Johnson-Cook material constitutive model to accurately simulate the material's behavior under high strain rate conditions.Utilizing Matlab,four composite models were designed with distinct CF volume fractions:0%,10%,20%,and 30%.These models were subjected to simulated dynamic impact events to assess their structural integrity and response.The simulations revealed that the stress-strain distribution within the composite material significantly improved with increasing CF content.Notably,the incorporation of CF effec-tively mitigate material damage and localize stress concentrations at the impact site.The composites with CF exhibit higher ultimate loads and plastic stresses,signifying a marked enhancement in material stiffness and strength.This translates to an augmented capac-ity to withstand impact forces.The analysis indicate that the reinforcement of PEEK with CF result in reduced stiffness degradation during impact,thereby increasing the material's energy absorption capabilities and diminishing the probability of impact-induced failure.In summary,the findings of this study corroborate the positive influence of CF on the impact resistance of PEEK-based composites.It is evident that increasing CF content significantly reduces the risk of failure under dynamic impact conditions.
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