Abstract
An experimental investigation of the counterintuitive behaviour in thin aluminium plates under fullfield test is presented in the paper. Special focus is placed on structural response and permanent deflection of the panels after the complex response. Thus, a series of tests with the plates varied in two kinds of thickness were conducted, where impulsive loading was generated by detonating the explosives at various standoff distances. As loaded impulsively, the vibration response was observed and the final configuration of each plate was measured and recreated. It is shown that all plates subjected to free air blast loading in such conditions exhibited plastic permanent deformation combined with distinct counterintuitive behaviour, as the plates deformed to the opposite direction of the incident wave. In addition, the characteristics of the permanent deflection can be divided into 2 typical deformation shapes, and the occurrences of which were correlated to the dimensionless parameter proposed in previous studies, confirmed to be an approximate indicator to describe the influence of loading conditions herein.
Highlights
Since the metal product performs outstanding efficiency on processing and molding, it is extensively employed in constructions and military structures
The objective of this study is to investigate the relationship between the concerned non-dimensional loading numbers and dynamic behaviour of clamped aluminium plates under airblast loading
It should be noted that this study has examined only structural response of aluminium plates in large scale
Summary
Since the metal product performs outstanding efficiency on processing and molding, it is extensively employed in constructions and military structures. With growing threats from terrorist activities and military actions in recent decades, which will definitely result in unbearable costs and causalities, several efforts have concentrated on improving the mechanics properties of those structures subjected to blast loading [1]. Considering the structural features and material characteristics, the investigations on dynamic behaviour and structural response of aluminium panels subjected to impulsive loading appear to be significant. Studies conducted previously were mostly focus on panels made of mild steel, which is a kind of typical rigid-perfectly plastic material, Nurick and Martin [2, 3] reported theoretical considerations and experimental studies on blast permanent deformation of thin clamped mild steel plates respectively, where varied boundary conditions were considered. Afterwards, there was experimental research carried out by Nurick and Shave [4] on the failure modes of strain-sensitive clamped plates as well, three modes
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call