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Degree

Master of Science (MS), Ohio University, Mechanical Engineering (Engineering), 1985.

Abstract

This study essentially consists of two parts; the development of a computer proqram for the simulation of the ring rolling process and a finite element analysis of plane strain rollinq as an initial step toward the application of the FEM technique for the dynamic simulation of the ring rolling process.

The program 'RING' is an interactive, user-friendly software, which has been written in FORTRAN-77 and is capable of running on all systems supporting FORTRAN-77. The program simulates three cases of ring rolling processes namely: 1. production of plain rings in radial pass alone. 2. production of plain rings in both radial and axial passes. 3. production of profiled rings in radial pass alone.

Given the dimensions of the ring required to be rolled, the m/c capacities, the other related parameters such as temperatures, specific heat, densities, etc. the program determines the dimensions of the initial blank, tolerances, weights and simulates the entire rolling process revolution by revolution and outputs parameters such as forces, moments, expansion rates, reduction rates, temperatures, energy losses etc. The reduction process is controlled by various rolling criteria and the program controls the simulation based on criterion selected and m/c capacities. The simulation is entirely controlled by the user. The simulation proceeds until the final ring dimensions required are reached and the program provides output in the datafiles or on the terminal. Output files are created for graphical representation of the process parameters at any stage of the operation.

The next part involved the modification of the finite element package for the simulation of plane strain rolling(cylindrical roller). Four case studies were conducted, considering both the strain and strain rate hardening materials and for the steady and unsteady modes of solution. The inferences and results have been discussed and compared with other work done in the same area. The possible approach toward the simulation of ring rolling using the finite element method has also been discussed.

Subject Headings

Engineering, Mechanical

Keywords

Ring Rolling; FEM Analysis; RING; FORTRAN-77

Advisor

Y Ray

Pages

174p.

Document number: ohiou1184000912
Permalink: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1184000912

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