 | | 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 |
Archive of Issues
| Total articles in the database: | | 11223 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8011
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| In English (Mech. Solids): | | 3212 |
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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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| 8. | L. M. Kachanov,
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[in Russian]. |
| 9. | A. M. Lokoshchenko,
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Trudy TsKTI,
No. 230, 107-109 (1986). |
| 10. | A. M. Lokoshchenko,
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in Steady and Unsteady Complex Stress States,"
in Elasticity and Inelasticity.
Intern. Scientific Symposium in Problems of Mechanics of Deformable Solids Dedicated to A. A. Il'yushin on the Occasion of His 100th Birthday,
January 20-21, 2011, Moscow
(Izdat. MGU, Moscow, 2011),
pp. 389-393
[in Russian]. |
| 11. | A. M. Lokoshchenko and V. V. Nazarov,
"Long-Term Strength of Metals under an Equiaxial Plane Stress State,"
Zh. Prikl. Mekh. Tekhn. Fiz.,
No. 4, 150-157 (2009)
[J. Appl. Mech. Tech. Phys. (Engl. Transl.)
50 (4), 670-676 (2009)]. |
|
| Received |
22 March 2015 |
| Link to Fulltext |
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