A Plasticity Theory of Metals Based on the Dislocation Substructures

A cyclic plasticity model developed from the microscopic deformation mechanism of metals is suggested. In the development of such a mechanistic model, the dislocation substructure of metals under different loadings is studied. Based on the observed substructure, the deformation mechanism of metals is described. The mechanisms that control the macroscopic mechanical behavior of materials are the change of dislocation substructures, the movement of active dislocations and the change in atomic spacing. By making quantitative assumptions for these mechanisms, a plasticity model is established. When compared to the experimental result, the model is found to be capable of predicting the mechanical behavior of metals under highly complicated loading conditions.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Mechanical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Doong, Shiing-Hwa

Contributors dc:contributor

• Socie, Darrell F.

• Engineering, Mechanical
• Engineering, Metallurgy
• Engineering, Materials Science

Identifier

(UMI)AAI8908667

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/70158