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Towards modelling elastic‐plastic deformation of a tube‐shaped work‐piece under axisymmetric load
Author(s) -
Putten Koos,
Werff Klaas,
Steinhoff Kurt,
Fontijne Jaap
Publication year - 2003
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200300177
Subject(s) - rotational symmetry , finite element method , process (computing) , structural engineering , basis (linear algebra) , limit load , forming processes , computer science , mechanical engineering , engineering , mechanics , mathematics , geometry , physics , operating system
The complex mechanisms occurring during the expansion of a tube‐shaped work‐piece are of particular interest for many industrial production processes. In case of the expansion of the outer end of a tube, so‐called flare forming, most of the process‐design parameters are mainly based on experience and empirical knowledge. To improve the methodological basis of process design and consequently to increase the technological efficiency of the process itself, two different types of models are developed and compared in this paper. The first one is a continuum‐mechanics based analytical model, the second one is a numerical model based on finite‐element simulation. Both models are able to describe the elastic and plastic behaviour during flare forming. For the analytical model classical theories are applied. Such theories are on the one hand those of Timoshenko, which are applied for the description of the elastic behaviour, and on the other hand a limit analysis for the characterization of the plastic behaviour. For the numerical model a non‐linear elastic‐plastic finite‐element simulation is carried out with the commercially available FEM‐software MARC‐Autoforge. Both models are validated and verified with experimental data and evaluated regarding their applicability under real industrial process conditions. Finally, it is not only concluded that flare forming can be modelled sufficiently by both approaches, but beyond that, tools for an optimised process design can be derived. These design tools can directly be integrated in a CAD‐system.