Equal channel angular pressing die to extrude a variety of materials

Balasundar, I.; Rao, M. Sudhakara; Raghu, T.

doi:10.1016/j.matdes.2008.06.057

Cited by 68 publications

(30 citation statements)

References 35 publications

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“…The appearance of a dead zone in a sharp outer corner of a rectangular ECAE die was assumed in several theoretical models 10,17 and observed in experiments with soft materials like plasticine 22 or wax 8 . From the other side many FEM simulations of ECAP predict rather appearance of gap between deformed billets and die corner [22][23][24] . This gap may be reduced or fully suppressed by the increase of friction in the outlet channel or by application of back pressure 25,26 .…”

Section: Comparison With Experimental Data and Fem Modelingmentioning

confidence: 99%

Analysis of equal channel angular extrusion by upper bound method and rigid blocks model

2013

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In present paper the Equal Channel Angular Extrusion (ECAE) through a rectangular die was firstly physically simulated using plasticine and then theoretically analyzed by upper bound method. Physical simulation was used to identify the deformation zone and as a background for the following theoretical ECAE analysis by rigid block model. The plane strain deformation mode and ideal plasticity of an extruded material were assumed. The dependencies of ECAE pressure, accumulated shear and dimension of a "dead zone" upon friction factor were analytically determined. The rise in ECAE pressure, accumulated shear and size of a "dead zone" with the increase in friction was predicted. The obtained results were compared with the slip line based solution and a good agreement between them was found. Finally the results of upper bound analysis were discussed together with the results of experimental investigations and finite element analysis of ECAE mechanics published elsewhere.

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Section: Comparison With Experimental Data and Fem Modelingmentioning

confidence: 99%

Analysis of equal channel angular extrusion by upper bound method and rigid blocks model

2013

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“…The deformation behaviour of commercial pure aluminium at room temperature was simulated by car- • 18 which is equivalent to a fillet radii of 5 mm [10] shown in Fig. 3 was modelled as a non-deforming rigid body and was assumed to be stationary by imposing zero displacement boundary conditions.…”

Section: Finite Element Analysismentioning

confidence: 99%

“…5a. It has been reported that the corner gap or corner angle made by the work piece is influenced by a number of factors such as friction [14,10], back stress [9], deformation speed [25], strain hardening rate [10,26]. Although a corner angle (ψ) of 16…”

Section: Deformation Patternmentioning

confidence: 99%

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Deformation behaviour of pure aluminium during multi-pass equal channel angular pressing through route #C

Kumar¹,

Balasundar²,

Raghu³

2010

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Deformation behaviour of commercial pure aluminium during multiple pass equal channel angular pressing (ECAP) through route #C has been evaluated using finite element analysis. The results obtained indicate that a parallelogram shaped uniform plastic strain distribution can be obtained in the work piece. The plastic strain variation along the top, middle and bottom of the work piece along its length suggests that during multiple pass ECAP following route #C, a uniform plastic strain can be obtained in the work piece after every two passes if one can neglect the front and back end of the work piece. The length of these ends that need to be removed in ECAP processed work piece was found to be equal to the ECAP channel width (w). Further, it has been established that during multi-pass ECAP through route #C, the corner gap subtended by the work piece is independent of its geometry, whereas the load--displacement curve is dependent on the work piece geometry.K e y w o r d s : equal channel angular pressing, finite element analysis, multi-pass, route #C

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“…In the case of mathematical modeling, five methods can be distinguished: finite differences, finite element, boundary element, finite volume, and methods without mesh. The main advantages of numerical techniques are the possibilities of obtaining results for complex shapes and the easiness of carrying out software simulation [2,5]. The disadvantage of numerical research is uncertainty of the simulation results that may be caused by false boundary assump-tions adopted during computer analysis.…”

Section: Introductionmentioning

confidence: 99%

Physical Analysis of Cross-Wedge Rolling Process of a Stepped Shaft

Wójcik¹,

Pater²

2017

Adv. Sci. Technol. Res. J.

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The paper presents experimental-model research results on the process of cross-wedge rolling of an axially-symmetrical element (stepped shaft). During research plastic mass on the basis of waxes in black and white colour was used. The aim of this experimental research was to determine the best option of forming in terms of values obtained and the course of forces. Physical examination was carried out using specialist machines, i.e. model and a laboratory cross-wedge rolling mill. Experimental analysis was carried out using billets with the temperature of 15°C, whereas the actual process was carried out for billet from C45 carbon steel of temperature 1150°C. The study compared the dimensions of the components obtained during rolling tests and forming forces obtained in the result of physical modeling with forces obtained during real tests.

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Equal channel angular pressing die to extrude a variety of materials

Cited by 68 publications

References 35 publications

Analysis of equal channel angular extrusion by upper bound method and rigid blocks model

Analysis of equal channel angular extrusion by upper bound method and rigid blocks model

Deformation behaviour of pure aluminium during multi-pass equal channel angular pressing through route #C

Physical Analysis of Cross-Wedge Rolling Process of a Stepped Shaft

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