UPPER BOUND ANALYSIS OF CYCLIC EXPANSION EXTRUSION

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SAMANDARI M.M.; TORABI S.H.R.; FARAJI GHADER

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Journal Paper

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Journal: Journal of Advanced Materials and Processing Year:2017 | Volume:5 | Issue:2 Page(s): 75-86

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Title

UPPER BOUND ANALYSIS OF CYCLIC EXPANSION EXTRUSION

Author(s)

SAMANDARI M.M. | TORABI S.H.R. | FARAJI GHADER

Keywords

SEVERE PLASTIC DEFORMATION

CYCLIC EXPANSION EXTRUSION

UPPER BOUND ANALYSIS

FINITE ELEMENT METHOD

Abstract

Deformation of the material during CYCLIC EXPANSION EXTRUSION (CEE) is investigated using upper-bound theorem. The analytical approximation of forming loads agrees very well with the FEM results for different amounts of chamber diameter, friction factor and also for lower die angles. However, the difference between analytical and numerical solution increases at higher die angles, which is explained by the formation of dead-metal zones at these angles. The results show that the forming load increases at higher friction coefficients, higher chamber diameters, and lower amounts of corner fillet radius, but for the die angle there is a maximum value of load at about 60o. Forming load is enhanced by the increase of the die chamber diameter and friction factor. Increasing the die chamber diameter causes higher strains and, therefore, higher rate of homogenous work. The load slightly decreased by an increase of the die corner radius because of the lower and more homogeneous strain distribution in the material.

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APA: Copy

SAMANDARI, M.M., TORABI, S.H.R., & FARAJI, GHADER. (2017). UPPER BOUND ANALYSIS OF CYCLIC EXPANSION EXTRUSION. JOURNAL OF ADVANCED MATERIALS AND PROCESSING (JOURNAL OF MATERIALS SCIENCE), 5(2), 75-86. SID. https://sid.ir/paper/704059/en

Vancouver: Copy

SAMANDARI M.M., TORABI S.H.R., FARAJI GHADER. UPPER BOUND ANALYSIS OF CYCLIC EXPANSION EXTRUSION. JOURNAL OF ADVANCED MATERIALS AND PROCESSING (JOURNAL OF MATERIALS SCIENCE)[Internet]. 2017;5(2):75-86. Available from: https://sid.ir/paper/704059/en

IEEE: Copy

M.M. SAMANDARI, S.H.R. TORABI, and GHADER FARAJI, “UPPER BOUND ANALYSIS OF CYCLIC EXPANSION EXTRUSION,” JOURNAL OF ADVANCED MATERIALS AND PROCESSING (JOURNAL OF MATERIALS SCIENCE), vol. 5, no. 2, pp. 75–86, 2017, [Online]. Available: https://sid.ir/paper/704059/en

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