An upper bound solution to extrusion of circular billet to circular shape through cosine dies

Narayanasamy, R.; Ponalagusamy, R.; Venkatesan, R.; Srinivasan, P. Bala

doi:10.1016/j.matdes.2004.11.026

Cited by 29 publications

(14 citation statements)

References 5 publications

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“…We refer to papers by Venkata Reddy et al (1995), Narayanasamy et al (2006), Ajiboye and Adeyemi (2006a,b), Wu and Hsu (2000), Maity et al (1996), Kima and Park (2003), where the upper-bound technique was applied to analyze the extrusion process for varying die geometry. The extensive literature related to analysis of plastic flow in extrusion processes can be found in these papers.…”

Section: Nomenclaturementioning

confidence: 99%

An upper-bound analysis of axisymmetric extrusion assisted by cyclic torsion

Maciejewski

Mróz

2008

Journal of Materials Processing Technology

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Section: Nomenclaturementioning

confidence: 99%

An upper-bound analysis of axisymmetric extrusion assisted by cyclic torsion

Maciejewski

Mróz

2008

Journal of Materials Processing Technology

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“…This can make the manufacturing process more economical. For this reason, several researchers investigated the influences of the die profile on the required forming load and energy as well as on the material flow during the process [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Some researchers employed the upper-bound method for optimization of the die profile for axisymmetric forward extrusion operation [3][4][5]. Various functions such as cosine [3], Legendre polynomial [4], as well as elliptic and hyperbolic [5] functions were used to find the optimal die geometries.…”

Section: Introductionmentioning

confidence: 99%

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Experimental, Analytical, and Numerical Studies on the Forward Extrusion Process

Fereshteh-Saniee

Fakhar

Karimi

2013

Materials and Manufacturing Processes

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This article in concerned with studying the effect of die profile on the load and energy necessary for plane-strain forward extrusion. With this regard, the geometries of the second-order polynomial and exponential die profiles were optimized in order to minimize the required extrusion pressure calculated based on the slab method. These optimal extrusion dies and the relevant linear one were manufactured for three extrusion ratios. After performing the extrusion experiments, the corresponding finite-element simulations were carried out under the same test conditions. All the analytical, experimental, and numerical findings, which were in good agreement with each other, showed that for all the extrusion ratios, the optimized polynomial and exponential die profiles involved the minimum and maximum force and energy requirements for the process, respectively. Moreover, the influence of the die geometry was more apparent at lower extrusion ratios. When the experimental results were analyzed based on the Taguchi method, it was also found that the effect of the die profile on the maximum extrusion load was more than one third that of the extrusion ratio.

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“…Nagpal and Altan [1] used the upper bound method for designing streamlined dies with round and rectangular sections. Using upper bound method Narayanasamy et al [2] designed a streamlined die for circular section which have a cosine profile. In the other research [3] they made an analytical solution for designing a streamlined extrusion die for a square cross-section.…”

Section: Introductionmentioning

confidence: 99%