WIT Press


Implementation Of A Unified Material Model In Finite Element Analysis And Simulations Of Cracked Components

Price

Free (open access)

Paper DOI

10.2495/DM000491

Volume

26

Pages

10

Published

2000

Size

753 kb

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

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