Influence of the Metal Volume Fraction on the maximum deflection and impact load of GLARE plates subjected to low velocity impact

Abstract

Influence of the Metal Volume Fraction on the permanent dent depth and energy absorption of GLARE plates subjected to low velocity impact GSE Bikakis, A Savaidis, P Zalimidis et al. Abstract. Fiber-metal laminates are hybrid composite materials, consisting of alternating metal layers bonded to fiber-reinforced prepreg layers. GLARE (GLAss REinforced) belongs to this new family of materials. GLARE is the most successful fiber-metal laminate up to now and is currently being used for the construction of primary aerospace structures, such as the fuselage of the Airbus A380 air plane. Impact properties are very important in aerospace structures, since impact damage is caused by various sources, such as maintenance damage from dropped tools, collision between service cars or cargo and the structure, bird strikes and hail. The principal objective of this article is to evaluate the influence of the Metal Volume Fraction (MVF) on the low velocity impact response of GLARE fiber-metal laminates. Previously published differential equations of motion are employed for this purpose. The low velocity impact behavior of various circular GLARE plates is predicted and characteristic values of impact variables, which represent the impact phenomenon, are evaluated versus the corresponding MVF of the examined GLARE material grades. The considered GLARE plates are subjected to low velocity impact under identical impact conditions. A strong effect of the MVF on the maximum impact load and a significant effect on the maximum plate deflection of GLARE plates has been found.

A Review on Mechanical Properties and Response of Fibre Metal Laminate under Impact Loading (Experiment)

“…The deformation of FML as well as the energy absorption was dependent on the thickness of metal layers 52,56,57) . This was because the MVF influenced the peak load, deflection at peak load, EA and SEA of the structure 48,67,68) . Nevertheless, sandwiched composite laminate with 2/1 layup configuration had better impact resistance and exhibited less deformation or cracking than 3/2 and 4/3 layup because the composite laminates were continuously stacked together 52,60) .…”