DiekA

DiekA is an in-house finite element code for forming simulations of the University of Twente, the Netherlands.

The code was founded in the early 1980's by Han Huétink and since then continuously developed. The code is designed to solve non-linear plasticity problems and therefore well suited to model forming processes like sheet forming, bulk forming and welding.

Currently DiekA is adopted as 'community software' for the Netherlands Institute for Metals Research (NIMR). DiekA is freely available for all official partners of the M2i.

DiekA 10.1 is the latest version. It was released in September 2011.

Known bugs and workarounds for v9.1

1.

Importing constraints via a neutral file.
Bug: The filename is erroneously converted to upper case.
Workaround: Make a copy of the neutral file with the filename in capitals.

Features of DiekA

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Updated Lagrangian formulation and Arbitrary Lagrangian Eulerian (ALE-) formulation (coupled and de-coupled)

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Static and dynamic implicit code

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Double sided contact. Thickness changes are accounted when using shell element

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Available element types: solid and shell elements

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Thermo-mechanical coupled calculations

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Direct and iterative solvers

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Incremental solution procedure, comprising the Newton Raphson algorithm, Line search and Arc length Method

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Advanced material models (both yield functions and hardening models)

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Pre- and post processing is suited for Patran format

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Special purpose pre-processors

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Operational on Linux, Solaris and Windows and MacOSX.