Computer-aided modelling of rolling

Savcı, Mehmet Nebi


Computerized analysis of parameters affecting shape and thickness in cold rolling of strip for soft materials
Senalp, AZ; Gökler, Mustafa İlhan; Akkok, M (Japan Society of Mechanical Engineers, 1997-03-01)
A conventional 4-Hi cold rolling mill configuration was modelled and a computer program was developed to analyze the effects of inlet thickness, width, desired exit thickness, symmetric and asymmetric jack forces, screw positions, tensions on the strip, roll geometries, and material properties on strip shape and thickness. For the analysis, the finite difference method was used as the discretization technique. The roll force was obtained by integrating the calculated roll-pressure over the are of contact, a...
Computer aided modeling of deep-drawing
Piskin, Mehmet Ali; Kaftanoglu, Bilgin (2007-04-04)
Deep-drawing operations are performed widely in industrial applications. It is very important for efficiency to achieve parts with no defects. in this work, a finite element method is developed to simulate deep-drawing operation including wrinkling. A four nodded five degree of freedom shell element is formulated. Isotropic elasto-plastic material model with Von Mises yield criterion is used. By using this shell element, the developed code can predict the bending behavior of workpiece besides membrane behav...
Modelling and simulation of friction in deep drawing
Başpınar, Murat; Akkök, Metin; Department of Mechanical Engineering (2011)
Different contact surface parameters and operating characteristics are observed during the deep drawing process. It is not possible to find a formulation that can be used for all lubrication regimes. Therefore, several friction models have been developed in order to overcome this problem. In this study, a math program is developed which combines Wilson’s and Khonsari’s friction models in a new model in order to increase accuracy and efficiency in friction calculations. By comparing the results of both frict...
Nonlinear dynamic modeling of gear-shaft-disk-bearing systems using finite elements and describing functions
Maliha, R; Dogruer, CU; Özgüven, Hasan Nevzat (ASME International, 2004-05-01)
This study presents a new nonlinear dynamic model for a gear-shaft-disk-bearing system. A nonlinear dynamic model of a spur gear pair is coupled with linear finite element models of shafts carrying them, and with discrete models of bearings and disks. The nonlinear elasticity term resulting from backlash is expressed by a describing function, and a method developed in previous studies to determine multi harmonic responses of nonlinear multi-degree-of-freedom systems is employed for the solution. The excitat...
Interactive classification of satellite image content based on query by example
Dalay, Oral; Atalay, Mehmet Volkan; Department of Computer Engineering (2005)
In our attempt to construct a semantic filter for satellite image content, we have built a software that allows user to indicate a few number of image regions that contains a specific geographical object, such as, a bridge, and to retrieve similar objects on the same satellite image. We are particularly interested in performing a data analysis approach based on user interaction. User can guide the classification procedure by interaction and visual observation of the results. We have applied a two step proce...
Citation Formats
M. N. Savcı, “Computer-aided modelling of rolling,” Ph.D. - Doctoral Program, Middle East Technical University, 1993.