Shah, Qasim Hussain and Abakrb, Yousif A.
(2007)
A comparison of energy absorbing capabilities of paper and steel structures subjected to progressive failure under free falling objects.
Journal of Engineering Science and Technology , 2 (2).
pp. 200-210.
ISSN 1823-4690
Abstract
An inverted paper cup of 0.26 mm thickness was subjected to deformation
under a freely falling steel ball at a velocity of 2.77 m/sec. The deformed
features of the paper cup were measured. The dynamic loading event was
simulated using piecewise linear plasticity material model in LSDYNA.
Deformed shape of the paper cup in finite element model matched closely with
experimental results with ignorable small discrepancies. The paper cup was able
to absorb all the kinetic energy of the falling steel ball for the above mentioned
falling speed and the ball did not bounce out of the cavity generated by the
impact. In LSDYNA a similar size steel cup was also subjected to a freely
falling ball with same speed and the energy absorbed was compared to the
energy absorbed by the paper cup. It was found that under similar conditions a
paper cup would undergo a significant progressive failure and absorb all the
energy of the falling object.
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