Equivalent Strains in Severe Plastic Deformation

The concept of equivalent plastic strain is discussed. Definitions may be based on kinematic arguments (like change of geometry) or on equivalence of plastic work. Complications arise when strain is accumulated in increments with variable strain path. A concept that allows to compare strains achieve...

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Bibliographic Details
Published in:Advanced engineering materials 2003-05, Vol.5 (5), p.291-295
Main Author: Stuwe, H P
Format: Article
Language:English
Subjects:
Applied sciences
Elasticity. Plasticity
Exact sciences and technology
Mechanical Properties
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Plastic Deformation
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Summary:The concept of equivalent plastic strain is discussed. Definitions may be based on kinematic arguments (like change of geometry) or on equivalence of plastic work. Complications arise when strain is accumulated in increments with variable strain path. A concept that allows to compare strains achieved by different SPD methods, designated “equivalent strain”, is introduced and discussed by the author. Their definition may be based on the shape of the specimen, or on the plastic work spent. Complications arise when strain is accumulated in increments with variable strain path. In this case, it may be helpful to introduce efficiency factors which depend on the material property under discussion.
ISSN:1438-1656
1527-2648
DOI:10.1002/adem.200310085