A Dislocation based Constitutive Model for Warm Forming of Aluminum Sheet

Kurukuri, S. and Ghosh, M. and Boogaard van den, A.H. (2008) A Dislocation based Constitutive Model for Warm Forming of Aluminum Sheet. In: The 9th International Conference on Technology of Plasticity, ICTP, 7-11 September 2008, Gyeongju, Korea.

Preview

PDF
250Kb

Abstract:	The formability of aluminum sheet can be improved considerably by increasing the temperature. At elevated temperatures, the mechanical response of the material becomes strain rate dependent. To accurately simulate warm forming of aluminum sheet, a material model is required that incorporates the temperature and strain rate dependency. In this paper, the dislocation based Alflow hardening model is used. The model incorporates the influence of the temperature and strain rate effect on the flow stress by means of the storage and dynamic recovery of dislocations. It also includes the effects of solute level, particle fraction and grain size. Cylindrical cup deep drawing simulations are presented using shell elements. The anisotropic behavior of the sheet is described by using the Vegter yield locus. Experimental drawing test data is used to validate the modeling approach, where the model parameters follow from tensile tests.
Item Type:	Conference or Workshop Item
Faculty:	Engineering Technology (CTW)
Research Group:	Applied Mechanics (AM)
Link to this item:	http://purl.utwente.nl/publications/60342
Export this item as:	BibTeX EndNote HTML Citation Reference Manager

Show download statistics for this publication

Repository Staff Only: item control page