Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Rais-Rohani, Masoud

Committee Member

Marin, Esteban

Committee Member

Horstemeyer, Mark

Date of Degree

8-6-2011

Document Type

Graduate Thesis - Open Access

Major

Aerospace Engineering

Degree Name

Master of Science

College

James Worth Bagley College of Engineering

Department

Department of Aerospace Engineering

Abstract

This thesis presents the development and implementation of a generalized optimization framework for use in sheet-stamping process simulation by finite element analysis. The generic framework consists of three main elements: a process simulation program, an optimization code, and a response filtering program. These elements can be filled by any combination of applicable software packages. Example sheet-stamping process simulations are presented to demonstrate the usage of the framework in various forming scenarios. Each of the example simulations is presented with a sensitivity analysis. These examples include analysis of a 2-dimensional single-stage forming, a 2-dimensional multi-stage forming, and two different 3-dimensional single-stage forming processes. A forming limit diagram is used to define failure in the 3-dimensional process simulations. Optimization results are presented using damage minimization, thinning minimization, and springback minimization with aluminum alloy 6061-T6 blanks.

URI

https://hdl.handle.net/11668/15455

Comments

forming limit diagram||finite element analysis||FLD||sheet forming||optimization||SQP||sequential quadratic programming||FEA

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