Shock Tube Experiments And Fe-simulation Of
The Structural And Material Non-linear Transient
Response Of Plates Subjected To Blast Loading
Author(s)
R. Schmidt, M. Stoffel & T. D. Vu
Abstract
This paper deals with the experimental investigation, modelling, and finite
element simulation of structures exposed to shock-type blast loading conditions
taking into account the structural and material non-linear effects. First- and thirdorder
transverse shear deformation theories of plates and shells serve as basis of
a finite element algorithm for the simulation of the transient, geometrically nonlinear
elastic-viscoplastic response. Isoparametric Lagrangian 9-node shell finite
elements and the central difference method for the time integration of the nonlinear
equations of motion are used. Experiments are performed on thin clamped
circular aluminium and steel plates in shock tubes. The main advantage of this
experimental technique is that the front wave impinging on the structure is plane
and yields a uniformly distributed pressure pulse. Consequently, in contrast to
other experimental methods reported in literature, the time history of the shocktype
loading can be modelled easily during the FE analysis. Comparative
numerical simulations using first- or third-order transverse shear deformation
plate theory, respectively, show a very good agreement with the experimental
results. The best correlation with the experimentally observed transient response
and permanent deflection is obtained by the refined, third-order transverse shear
deformation model.
Keywords: blast loading, shock tube, first- and third-order transverse shear
deformation theory, viscoplasticity.
1 Introduction
The present paper deals with modelling, computational simulation and
experimental investigation of the transient large deflection elastic-viscoplastic
Keywords
blast loading, shock tube, first- and third-order transverse shear
deformation theory, viscoplasticity
Related Book
Other papers in this volume
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