Methods for modelling the ultimate strength of orthotropic plate with a central hole under uniaxial tension |
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Authors: | S Baselga Ariño M Maza Frechín |
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Affiliation: | (1) Department of Mechanical Engineering, University of Zaragoza, St/María de Luna, s/n, (Betancourt), 50018 Zaragoza, Spain |
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Abstract: | The stress state in plates with circular holes made of orthotropic homogeneous material has no singularities and it can be
exactly determined. The numerical stress distribution calculation by the finite element method will be compared with those
obtained by the analytical equations developed by several authors. The goal of this work is to validate the finite element
method, in conjunction with in-plane and out of plane failure criteria, in order to calculate not only the stress distribution
for orthotropic plates with circular holes but also to determine their ultimate strength.The tool used has been a user subroutine
(UMAT) specially developed for this work that implements the features of the commercial FE program (ABAQUS). The code performs
an implicit analysis of the stress-state with progressive damage modelling.Finally, both of them, numerical and analytical
method, will be checked with experimental tests by means of strain gauges. |
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