| | Mechanics of Solids A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544 Online ISSN 1934-7936 |
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A.M. Lokoshchenko, "Use of a Vector Damage Parameter in Modeling of Long-Term Strength of Metals," Mech. Solids. 51 (3), 315-320 (2016) |
Year |
2016 |
Volume |
51 |
Number |
3 |
Pages |
315-320 |
DOI |
10.3103/S0025654416030080 |
Title |
Use of a Vector Damage Parameter in Modeling of Long-Term Strength of Metals |
Author(s) |
A.M. Lokoshchenko (Institute of Mechanics, Lomonosov Moscow State University, Michurinskii pr. 1, Moscow, 119192 Russia, loko@imec.msu.ru) |
Abstract |
We consider the results of known tests of tubular specimens under a constant axial stress and a constant or alternating tangential stress. The cyclic variation in the sign of the tangential stresses significantly increases the time to fracture.
The modeling of long-term strength of metals in unsteady complex stress states encounters significant difficulties. The application of the kinetic theory of long-term strength is apparently the most promising method for solving this problem. As a rule, the use of a scalar damage parameter does not permit describing the specific characteristics of fracture for various loading programs. The use of a tensor damage parameter also encounters difficulties because of a large number of functions and material constants contained in the kinetic equations. In this paper, we propose to use a vector damage parameter to describe the experimental data under study. |
Keywords |
long-term strength, complex stress state, kinetic theory, vector damage parameter, tubular specimen, time to fracture, alternating torsion |
References |
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|
Received |
22 March 2015 |
Link to Fulltext |
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