working on thermo-mechanical solver in DAMASK (with Tias)

While using the thermo-mechanical solver in DAMASK, we (me and Tias) figured that if we specify some thermal source, we need an initial deltaT for convergence. For example, even if we have a bicrystal and we give zero deltaT then the calculation fails even at the first increment because the 2-PK is zero.

However, if we start even with a minute deltaT (1K or so..) we get convergence. But if we have a single crystal this situation doesn’t arise. This is something to keep in mind, and possible requires delving into.

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One Comment Add yours

  1. Actually after further analysis we found that we need to specify the properties (specific heat and mass density) for all the phases that are specified in the material config.

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