Implementation Of A Unified Material Model In
Finite Element Analysis And Simulations Of
Cracked Components
Author(s)
G. Shatil and D.J. Smith
Abstract
A new form of a unified viscoplastic material model based on overs tress was
implemented in finite element code using a material constitutive equation
programme. The analysis results, employing equivalent forms of the stresses, the
overstresses and the inelastic strains, were consistent with results obtained from:
(i) uniaxial direct rate dependent integration simulations, (ii) results obtained
indirectly by employing experimental stress strain curves and, (iii) experiments.
Simulations of two batches of CP (commercial purity) titanium specimens
containing cracks subjected to either different displacement rates, or sustained
loads (creep) predicted material deformation and failure behaviour that was close
to experimental results. However, the simulation results we
Keywords
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