Showing papers by "Taylan Altan published in 1980"
TL;DR: In this article, a computer-aided design (CAD) system for predicting metal flow and roll stresses in plate rolling was developed, which is capable of predicting: (i) the lateral spread, elongation, boundaries of the deformation zone, and the location of the neutral plane.
23 citations
TL;DR: In this article, two computer-aided design (CAD) programs developed for modeling the shape rolling process for airfoil sections are presented, SHPROL and ROLPAS.
Abstract: This paper describes two computer-aided design (CAD) programs developed for modeling the shape rolling process for airfoil sections. The first program, SHPROL, uses a modular upper-bound method of analysis and predicts the lateral spread, elongation, and roll torque. The second program, ROLPAS, predicts the stresses, roll separating force, the roll torque and the details of metal flow by simulating the rolling process, using the slab method of analysis. ROLPAS is an interactive program; it offers graphic display capabilities and allows the user to interact with the computer via a keyboard, CRT, and a light pen. The accuracy of the computerized models was evaluated by (a) rolling a selected airfoil shape at room temperature from 1018 steel and isothermally at high temperature from Ti-6A1-4V, and (b) comparing the experimental results with computer predictions. The comparisons indicated that the CAD systems, described here, are useful for practical engineering purposes and can be utilized in roll pass design and analysis for airfoil and similar shapes.
16 citations
TL;DR: In this paper, the authors present a review of recent work in computer-aided design models for limit strains, air-bending in a press brake and rubber forming, as well as the application of simple analyses to the problem of shape control in smoothly contoured panels.
8 citations
TL;DR: In this article, a simple load calculation method and its application to forging a steel connecting rod are described and compared with the results of computer-aided analysis and with experimental forging data.
Abstract: The forging engineer must often estimate the load necessary in a press forging operation. Thus, the appropriate press capacity can be selected and, in some cases, it can be decided whether or not in-house capability exists for quoting on a given forging. This paper describes a simple load calculation method and its application to forging a steel connecting rod. The results, obtained with a hand calculator, are evaluated by comparing them with the results of computer-aided analysis and with experimental forging data. This comparison indicated that hand calculator results are sufficiently accurate for estimating forging loads and stresses. It is expected that the technique, described in this paper, will be a useful tool for the engineers in forge shop practice.
3 citations