An Upper Bound Solution for Analysis of Twist Extrusion Process with Elliptical Die Cross-section

Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering

مقاله 5، دوره 2، شماره 2، آذر 2009، صفحه 37-46   

نوع مقاله: Persian

نویسندگان

Yaser Mirbagheri¹؛ Hamed Masoumi^{* 1}؛ Majid Seyed Salehi²

¹Department of Mechanical Engineering, Golpayegan Branch, Islamic Azad University, Golpayegan, Iran

²Ph.D. Student, Sharif University of Technology.

چکیده

Twist extrusion process is a rather new route to produce highly strained materials. In this process, severe plastic deformation is applied by large shear strains. In current article, required energy for twist extrusion by use of admissible velocity field together with the upper bound technique is predicted. The proposed model is capable of considering the effect of various parameters such as die geometry and friction conditions. In addition, the model anticipates the critical die design parameters. To verify the proposed model, the predictions were compared with the results of a finite-element analysis and reasonable consistency was observed.

کلیدواژه‌ها

Twist extrusion؛ Velocity field؛ Upper bound technique؛ Severe Plastic Deformation

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