Stretch bending of aluminium extrusions

• Autorzy: Clausen A. H. , Hopperstad O. S. , Langseth M.
• Języki publikacji: EN

Abstrakty

EN

Stretch bending is an important method for plastic forming of aluminium extrusions to some desired curvature. The industrial application of the process is, however, not always straightforward. Tolerance demands to the final product and production efficiency require proper control of possible difficulties such as cross sectional deformations and unloading springback. Traditionally, trial-and-error and in-house experience have provided information for necessary process adjustments. The development of numerical tools such as the Finite Element Method (FEM) offers new possibilities for attaining further and more generally applicable knowledge on the stretch bending process. However, numerical simulation of forming processes is a rather delicate task involving large deformations, material non-linearities and contact challenges. Therefore, laboratory test data must be used to validate the numerical model. Rectangular hollow sections were thus studied in a stretch bending rig. Considering sagging and springback as the main response parameters, satisfactory agreement was found between test results and numerical predictions from LS-DYNA. Subsequently, LS-DYNA was employed to analyse a wider spectrum of process parameters than those investigated in the laboratory.

Słowa kluczowe

EN

rectangular hollow section; material characterisation; stretch bending rig; LS-DYNA; sagging; springback

PL

charakterystyka materiałowa; ugięcie; rozciąganie

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2002
• Tom: Vol. 7, no 1
• Strony: 7--32
• Opis fizyczny: Bibliogr. 22 poz., rys.,tab., wykr.

Twórcy

autor

Clausen A. H.

• Department of Structural Engineering Norwegian University of Science and technology N-7491 Trondheim, Norway

autor

Hopperstad O. S.

• Department of Structural Engineering Norwegian University of Science and technology N-7491 Trondheim, Norway

autor

Langseth M.

• Department of Structural Engineering Norwegian University of Science and technology N-7491 Trondheim, Norway

Bibliografia

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