OOFEM – An Object Oriented Framework for Finite Element Analysis

This paper presents the design principles and structure of the object-oriented finite element software OOFEM, which has been under active development for several years. The main advantages of the presented framework include modular design, extensibility, and robustness. The code itself is freely available and is distributed under GNU public license. It provides tools for linear and nonlinear analysis of mechanical and transport problems on sequential and parallel computers.

Platforms for ICME

This chapter introduces software engineering issues and recommends best practices approaches to software integration. It presents algorithms for multiphysics coupling, and focuses on weak, intermediate, and strong solution strategies. The integration involves, in general, two main aspects. One is obviously technical in nature, that is, how to achieve the interoperability in terms of the software tools and their respective data representation models. The other is of more fundamental scientific nature and pertains specifically to the coupling and linking of the underlying physical and chemical models. The lack of standardization is probably the main limiting factor in the widespread usage of integrated solutions by commercial as well as academic users. Fortunately, there are ongoing standardization activities in Integrated Computational Materials Engineering (ICME): The Minerals, Metals, and Materials society (TMS); Integrated Computational Materials Engineering Expert Group (ICMEg); Consortium for Open Multiphysics; European Materials Modelling Council (EMMC); and EU Multiscale Materials Modelling Cluster

Three-dimensional network modelling of the influence of microstructure on mass transport in unsaturated soils

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Contact Modelling of Large Radius Air Bending with Geometrically Exact Contact Algorithm

Usage of high-strength steels in conventional air bending is restricted due to limited bendability of these metals. Large-radius punches provide a typical approach for decreasing deformations during the bending process. However, as deflection progresses the loading scheme changes gradually. Therefore, modelling of the contact interaction is essential for an accurate description of the loading scheme. In the current contribution, the authors implemented a plane frictional contact element based on the penalty method. The geometrically exact contact algorithm is used for the penetration determination. The implementation is done using the OOFEM – open source finite element solver. In order to verify the simulation results, experiments have been conducted on a bending press brake for 4 mm Weldox 1300 with a punch radius of 30 mm and a die opening of 80 mm. The maximum error for the springback calculation is 0.87° for the bending angle of 144°. The contact interaction is a crucial part of large radius bending simulation and the implementation leads to a reliable solution for the springback angle