期刊名称：International Journal of Energy and Environment
印刷版ISSN：2076-2895
电子版ISSN：2076-2909
出版年度：2019
卷号：10
期号：6
页码：1-14
出版社：International Energy and Environment Foundation (IEEF)
摘要：Composite materials are widely used in many civil and military applications because of their excellent
mechanical properties. In military applications, composite materials are used to protect vehicles and
aircraft and to manufacture shields for their ability to absorb and disperse impact energy. In this paper,
used high velocity impact with a bullet (it mass of 8 𝑔, diameter 9 𝑚𝑚 and a semi-circular projectile head)
with a specific velocity ranging from 210 − 365 𝑚/𝑠, to investigate the elastic deformation for composite
plate structure with various composite laminated parameters effect. Where, studied the effect of the impact
by using theoretically technique, in addition to, calculating the natural frequency for plates by using
analytical and numerical techniques, and then, comparison the results obtained. In the theoretical part,
problems were analysed into several categories, the first is the calculation of the elastic deformation in the
composite materials samples which depends on several parameters such as the calculation of the natural
frequency, the time and force contact, and elastic deformation. An equation for the calculation of elastic
deformation was derived based on the classical theory of plates. Also, the natural frequency results
calculated analytically by using classical theory of plates with drive the general equation of motion. Then,
by using numerical technique calculating also the natural frequency of plates, and then, comparison the
results obtained with analytical results obtained. When, the numerical technique include using for finite
element technique to calculate the vibration behaviour for plate. Then, the comparison for results given a
good agreement for analytical technique used with maximum error did not exceed about (1.23%).
