Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Schneider, Judy

Committee Member

Eamon, Christopher

Committee Member

Berry, John T.

Date of Degree

8-3-2002

Document Type

Graduate Thesis - Open Access

Major

Mechanical Engineering

Degree Name

Master of Science

College

College of Engineering

Department

Department of Mechanical Engineering

Abstract

This thesis presents the simulation of chip formation in orthogonal metal cutting to evaluate the predictive capabilities of finite element code DYNA 3D. The Johnson and Cook constitutive model for materials, OFHC Copper, Aluminum 2024 T351, and Aluminum 6061 T6 alloy were incorporated into the simulation to account for the effects of strain hardening, strain rate hardening, and thermal softening effects during machining. Calculated values for the Johnson and Cook constitutive constants for Aluminum 6061 T6 alloy were determined from the literature. The model was compared to experimentally measured shear angles, chip thickness, chip velocity, and forces from the literature to evaluate the accuracy of the finite element code for a range machining strain rates. In an attempt to determine the predictive capabilities of DYNA 3D a strain rate regime of 10+3 s-1 to 10+4 s-1 was defined as the optimal strain rate regime for the orthogonal metal cutting application.

URI

https://hdl.handle.net/11668/20310

Comments

computational manufacturing||modeling metal cutting||modeling chip formation||constitutive modeling for metal cutting

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