Quasi-static and Dynamic Analysis of Multi-Layered Steel Beams: Core Optimization

抄録

This paper addresses the quasi-static and dynamic response of multi-layered steel beams using finite element analysis. The steel beam has four corrugated cores in between the top and bottom substrates. The cores are arranged with corrugated sheets of different thickness. Quasi-static test is first performed to select a suitable material, either thin steel substrate made of steel 1008 or thick steel substrate made of steel 1018, for the top substrate plate, and is then validated with finite element analysis. Upon quasi-static tests and finite element validations, the top plate is selected and dynamic responses of various core layups are further evaluated. The stress-strain relations of carbon steel 1018 at high strain rates are measured using the Split-Hopkinson pressure bar. A finite element modeling procedure for dynamic analysis is validated with a set of shock tube experiments. Corrugated multi-layered steel core arrangements are taken into account for design parameters in order to maximize mitigation of blast load effects onto the main structure.