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Source code for: UMAT subroutine for material modelling of timber with Abaqus

. Software, (2025)Related to: Töpler, J. (2025). Lateral torsional buckling of imperfection-sensitive timber members under combined compression and bending (in preparation). Dissertation, Institute of Structural Design, University of Stuttgart, Stuttgart, Germany.
DOI: 10.18419/darus-5062

Abstract

This repository contains a UMAT subroutine for modelling orthotropic behaviour with brittle failure for tension in the x-direction, ellipsoid elastoplastic behaviour for compression in grain direction (x-direction), and bilinear elastoplastic behaviour for shear in the xy-, xz-, and yz-planes. A stress interaction is only considered for the three shear components. The UMAT subroutine was developed in the dissertation of Janusch Töpler. For more information see Annex D of the dissertation.

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