Abstract
In this paper, an analytical model, which based on energy balance, is built to study the process of high velocity impacts on woven Kevlar composite laminates by a cylindrical projectile. Four different mechanisms, such as laminate crushing, linear momentum transfer and tensile fiber failure, and shear plugging, is absorbed by the laminate while impacting. Then, simplification of the model is done to obtain the residual velocity and ballistic limit. The analytical results are validated with the results of experiment, and the perturbation analysis is done to analyze the reason of error.
Highlights
Resistance to ballistic impacts is an important requirement in many industrial applications, such as car, space shuttle and aeronautical industry
The projectile’s residual velocity and ballistic limit are calculated by energy balance equation
Sikarwar et al [11, 12] and Wang Yuanbo et al [13, 14] studied the analytical and experimental results of the residual velocity and ballistic limit of glass/epoxy and Kevlar/epoxy composite laminates respectively, which are subjected to high velocity impact
Summary
Resistance to ballistic impacts is an important requirement in many industrial applications, such as car, space shuttle and aeronautical industry. Wen et al [6, 7] applied projectiles with different shapes to investigate FRP laminates’ perforation and penetration Another method to predict the behavior of impact was the energy method. To make a quick assessment at early stages of the design process, Lopez-Puente et al neglect elastic deformation contribution in impact event [19] and proposes a low-cost model and obtains closed-form solution to predict the ball projectile’s residual velocity after impacting on thin CFRPs woven laminated plates [20], but the influence of shear plugging [21,22,23] is not considered in their research. An analytical model is proposed to build the energy balance equation and predict the residual velocity of a cylindrical projectile after impacting at woven Kevlar composites. The method of simplification could be useful in preliminary assessment of engineering
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