In this tutorial we can see how to create a model in ABAQUS/CAE with two yield criteria in UMAT.

The files used and created through the tutorial are accessible from this link.

 

To cite the implementation please refer to:

G. Molnár, G. Kermouche, E. Barthel, Plastic response of amorphous silicates, from atomistic simulations to experiments – A general constitutive relation, Mechanics of Materials, 114 pp. 1-8, 2017. (Download) (Journal)

 

To cite the empirical material model please refer to:

G. Kermouche, E. Barthel, Mechanical modelling of indentation-induced densification in amorphous silica, Acta Materialia, 56 pp. 3222–3228, 2008. (Journal)

 

More information on the material model developement can be found in:

G. Molnár, P. Ganster, A. Tanguy, E. Barthel, G. Kermouche, Densification dependent yield criteria for sodium silicate glasses – An atomistic simulation approach, Acta Materialia, 111 pp. 129-137, 2016. (Download) (Journal)

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