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THE SHEARED-SLAB METHOD (SSM): A MODIFICATION ON THE CLASSICAL SLAB METHOD (CSM) FOR EXTRUSION ANALYSIS THROUGH CONICAL DIES | ||
| AL-TAQANI | ||
| Article 1, Volume 21, Issue 1, 2008, Pages 132-145 | ||
| Author | ||
| Saify Kamal M.K | ||
| Abstract | ||
| This paper presents, for the first time, a very useful improvement on the classical slab method for direct-extrusion and drawing of solid rods through conical dies, in which an allowance for transverse shear effect is formulated successfully. The present asymptotic approximation for shear linearity within the billet-die domain, results in good agreement of the relative pressure ratio with those acquired by professional experiment, and in some cases it seems better than that achieved by the excellent upper-bound approaches (UBA) of spherical velocity field, while the averaging of the shear makes the formal expression of the pressure ratio very similar to that obtained by the lengthy UBA of right-trapezoidal velocity field. It can now confidently assign the localized inner surface pressure at any position of the die by the new developed governing equation of the acting forces for design and analysis purposes in relevant field. | ||
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