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Thermal Effect in Dynamic Yielding and Fracture of Metals and Alloys

Department of Mathematics and Mechanics, St Petersburg State University, Stariy Peterhof, Universitetsky pr., 28, St.-Petersburg, 198504, Russia

E.V. Sitnikova

Department of Mathematics and Mechanics, St Petersburg State University, Stariy Peterhof, Universitetsky pr., 28, St.-Petersburg, 198504, Russia

N.F. Morozov

Department of Mathematics and Mechanics, St Petersburg State University, Stariy Peterhof, Universitetsky pr., 28, St.-Petersburg, 198504, Russia

Y.V. Petrov

Department of Mathematics and Mechanics, St Petersburg State University, Stariy Peterhof, Universitetsky pr., 28, St.-Petersburg, 198504, Russia

The explanation of transition between ductile and brittle modes of fracture based on the "incubation time" concept is proposed. This approach allows us to establish relation between the influences of different loading parameters (strain-rate, temperature) on the mode of fracture. Proposed criteria give explanation to anomalous behavior of yield limit and possible high-temperature embrittlement.

Key Words: fracture • yielding • brittle-to-ductile transition • impact loading • strain rate effects • time-temperature correspondence • incubation time approach

Mathematics and Mechanics of Solids, Vol. 14, No. 1-2, 72-87 (2009)
DOI: 10.1177/1081286508092603


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