 | | 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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| D. A. Kulagin and A. M. Lokoshchenko, "Modeling of the influence of a corrosive environment on the creep and long-term strength of metals subjected to complex stress state," Mech. Solids. 39 (1), 143-152 (2004) |
| Year |
2004 |
Volume |
39 |
Number |
1 |
Pages |
143-152 |
| Title |
Modeling of the influence of a corrosive environment on the creep and long-term strength of metals subjected to complex stress state |
| Author(s) |
D. A. Kulagin (Moscow)
A. M. Lokoshchenko (Moscow) |
| Abstract |
A new approach is suggested for the description of deformation
and long-term fracture of metals under the simultaneous
influence of external mechanical loads at a complex stress state and
a corrosive environment. To model this influence, we utilize
the structural-phenomenological approach in accordance to which
the material is represented as consisting of a large number
of structural elements. To describe the long-term strength phenomenon,
we introduce the concept of the probability of fracture for individual
elements and derive the kinetic equation for the density
of undamaged structural elements. To characterize the complex stress state,
we utilize the concept of the equivalent stress in the structural element.
We choose the stress intensity to be the equivalent stress. For a special
case of loading of a cylindrical shell, the conditions of the initiation
and propagation of the fracture front are established. The transition from
the microfracture on the level of the structural elements to the macrofracture
of the entire body is considered. Detailed creep and long-term strength
analyses are performed for a thick-walled tube subjected to an internal
pressure and a corrosive medium in the internal cavity. The equations
obtained are applied to the analysis of the familiar experimental data
on the long-term strength scale effect in thin-walled tubular specimens. |
| References |
| 1. | V. V. Bolotin, Durability of Machines and Structures
[in Russian], Mashinostroenie, Moscow, 1990. |
| 2. | Yu. N. Rabotnov, Mechanics of Solids
[in Russian], Nauka, Moscow, 1988. |
| 3. | J. Bogdanoff and F. Kozin,
Probabilistic Models Of Cumulative Damage
[Russian translation], Mir, Moscow, 1989. |
| 4. | D. A. Kulagin and A. M. Lokoshchenko, "Analysis of the influence
of a surrounding medium on the long-term strength by using a probabilistic
approach," Izv. AN. MTT [Mechanics of Solids], No. 1, pp. 124-133, 2001. |
| 5. | L. M. Kachanov, "On the failure time in the case of creep,"
Izv. AN SSSR. OTN, No. 8, pp. 26-31, 1958. |
| 6. | Yu. N. Rabotnov, "On the long-term fracture mechanics,"
in Issues of Strength of Materials and Structures [in Russian],
pp. 5-7, Izd-vo AN SSSR, Moscow, 1959. |
| 7. | V. D. Kurov, G. P. Mel'nikov, and V. D. Tokarev,
"The influence of the scale effect on the failure time
for steel Kh18N10T tubes in the case of creep at a temperature
of 1123 K, Mashinovedenie, No. 6, pp. 107-108, 1967. |
|
| Received |
14 October 2003 |
| << Previous article | Volume 39, Issue 1 / 2004 | Next article >> |
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