 | | 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: | | 12854 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8044
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| In English (Mech. Solids): | | 4810 |
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| << Previous article | Volume 49, Issue 4 / 2014 | Next article >> |
| A.M. Lokoshchenko, "Vibrocreep of Metals in Uniaxial and Complex Stress States," Mech. Solids. 49 (4), 453-460 (2014) |
| Year |
2014 |
Volume |
49 |
Number |
4 |
Pages |
453-460 |
| DOI |
10.3103/S0025654414040104 |
| Title |
Vibrocreep of Metals in Uniaxial and Complex Stress States |
| Author(s) |
A.M. Lokoshchenko (Institute of Mechanics, Lomonosov Moscow State University, Michurinskii pr-t 1, Moscow, 119192 Russia, loko@imec.msu.ru) |
| Abstract |
The results of the creep tests with extension and torsion of tubular specimens made of D16AT and AD1 aluminum alloys, which were earlier obtained at the Institute of Mechanics, Lomonosov State University, were analyzed theoretically. Experimental data obtained with the author's participation imply that a sharp increase in creep rate is observed under certain conditions when a vibration stress of small amplitude is added to the static stress. This effect (vibrocreep effect) is manifested only if the form of the stress state under the common action of static and dynamic stresses differs from the form of the static stress state. In this case, as the duration of the applied vibration stress increases, the vibrocreep effect gradually weakens.
In this paper, we propose a model for describing the obtained experimental data containing the kinetic parameter; this parameter is nonzero only in the case of a complex stress state in the tubular specimens. As a positive measure of this parameter, we use the angle of rotation of the maximum principal stress vector when small vibrations are added to the basic stress state. The obtained experimental and theoretical creep curves are in a good agreement for different types of the stress states. |
| Keywords |
creep, tubular specimen, complex stress state, aluminum alloy, vibration, vibrocreep effect, modeling, kinetic theory |
| References |
| 1. | D. A. Gokhfeld, K. M. Kononov, O. S. Sadakov, and O. F. Chernyavskii,
"Strength Problems of Thermostressed Structures,"
in Itogi Nauki Tekh., Ser. Mekh. Deform. Tverd. Tela, Vol. 12
(VINITI, Moscow, 1990),
pp. 91-194
[in Russian]. |
| 2. | V. P. Golub,
"Studies in the Field of Cyclic Creeping of Materials (Survey),"
Prikl. Mekh.
23 (12), 3-19 (1987). |
| 3. | V. P. Radchenko and P. E. Kichaev, Energy Concept of Creeping and Vibrocreep of Metals (Samara Gos. Tekhn. Univ.,
Samara 2011) [in Russian]. |
| 4. | A. M. Lokoshchenko and S. A. Shesterikov, "On Vibrocreep," Inzh.
Zh. MTT, No. 3, 141-143 (1966). |
| 5. | A. M. Lokoshchenko, E. A. Myakotin, and S. A. Shesterikov,
"Examination of the Effect of Low-Amplitude Vibrations on Creep,"
Probl. Prochn.,
No. 5, 50-54 (1985)
[Strength of Materials (Engl. Transl.)
17 (5), 642-646 (1985)]. |
|
| Received |
18 May 2012 |
| Link to Fulltext |
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