Nonlinear Structural Consequences Of Plates
With Apertures Under Pulse Pressure Loads:
An Experimental And Numerical Study
Author(s)
N. J. Underwood, G. K. Schleyer, J. K. Paik & B. J. Kim
Abstract
This paper investigates a complex problem involving large inelastic deformation
in thin clamped square ductile plates with a variety of apertures. Thin plated
structures are used in a wide range of situations where the possibility of loading
from a gas explosion or an IED should be considered in the design, e.g. deck
plating and bulk heads on ships and offshore platforms to aircraft structure
applications. The material used is Docol form 01, a highly ductile cold rolled
mild steel, ideal for impact applications. The study utilizes a differential pressure
device developed at the University of Liverpool Impact Research Centre capable
of producing repeatable uniform transient pressure loading on 0.5 m by 0.5 m
plate specimens. Structural response was investigated at two nominal pressure
levels for plates with varying apertures. The effect of any pressure variance
occurring around these openings in relation to global loading on the plates was
also investigated. Extensive material tests were performed and parameters used
in a Cowper-Symonds constitutive model. A series of FEA simulations of the
blast loading was also conducted and compared with the experimental data for
validation. Initial studies show a good correlation between experimental and
numerical simulations.
Keywords: transient loading, thin steel plates with holes, sub-scale tests,
numerical simulations.
Keywords
transient loading, thin steel plates with holes, sub-scale tests,
numerical simulations
Related Book
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