Study of the Mechanical Behavior of Lightweight Multifunctional Hybrid Systems Under High Loading Rates
Recently, lightweight multifunctional hybrid systems have been manufactured using low density metallic foams bonded to thermoplastic polymer matrix composites and fiber-metal laminates. These systems have shown to offer a number interesting properties such as high stiffness, vibration and sound dampening, energy absorbing characteristics under quasi- static and low velocity loading conditions, etc., and could be used in a wide range of engineering applications. In this study, the high velocity impact behavior of such lightweight systems was investigated using a high-speed pneumatic testing system. The systems consisted of Fiber-Metal Laminates (FML) skins bonded to a metallic foam core. Here, 10 and 20 mm thick closed cell aluminum foam cores with a density of 240 kg/m3 were used. Short beams were simply supported and loaded under three point bend loading conditions at a speed of 10 m/s. Experimental data was obtained by using a test set up that included a load sensor and high speed digital imagery. Damage evolution and failure mechanisms were revealed under high velocity impact loading conditions.
Author: Germán Reyes, and Prakash Mallik Pariti
Conference: SAMPE Seattle 2017