Showing papers by "Taylan Altan published in 1978"

Computer-Aided Analysis of the Deformations and Temperatures in Strip Rolling

Abstract: This paper describes the principles and the application of two mathematical models, developed for predicting the significant variables of the strip rolling process. The first model and the associated computer program ROLING can estimate the roll-separating force and the roll torque. This model includes the most up-to-date analyses of (a) the plastic deformation in the strip, (b) the elastic compression and recovery of the strip before and after rolling, and (c) the elastic deformation of the rolls. The second model and the associated computer program ROLTEM have been developed to simulate the metal flow and temperatures in strip rolling. They consider simultaneous heat generation, heat transport, and heat transfer during rolling using a finite-difference algorithm. The predictions made by the computer programs ROLING and ROLTEM have been compared with existing experimental data. The results indicate that the agreement of theoretical predictions with experimental results is well within acceptable engineering accuracy.

Systems approach in massive forming and application to modeling of forging processes

Abstract: This paper reviews the application of systems approach to massive forming processes. A detailed classification of massive forming processes is given and using impression die forging as an example, the significant process variables and their interactions are systematically discussed. The paper also gives an example in forging, which illustrates the application of the systems approach to modeling of forging, a massive forming process. Finally, the future potential, capabilities and shortcomings of process modeling are discussed and recommendations for future work are made. It is expected that the paper can be useful to the metalforming engineer, active in research or production, who is interested in systematic analysis and design of massive forming processes.