| | 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: | | 12804 |
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In English (Mech. Solids): | | 4760 |
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V. A. Peleshko, "Utilization of a damage surface for the description of creep and long-term strength in the case of complex loading," Mech. Solids. 38 (2), 101-112 (2003) |
Year |
2003 |
Volume |
38 |
Number |
2 |
Pages |
101-112 |
Title |
Utilization of a damage surface for the description of creep and long-term strength in the case of complex loading |
Author(s) |
V. A. Peleshko (Moscow) |
Abstract |
Constitutive relations are proposed for media with initially isotropic creep and anisotropic
damage accounted for by to the dependence of the fracture criterion
parameter on the form of the stress state under simple loading and the
inhomogeneity of damage accumulation in different physical directions
under complex loading. Each direction in the vector space of stresses is
associated with its own damage. Its increment is equal to the increment of
scalar damage multiplied by the value of a material function of the angle
between the said direction and the vector of stresses acting at a given
instant. The set of simultaneous damage values in all directions of the
stress space forms a surface of anisotropic damage. The value of damage in
the direction of the vector of stresses acting at the current instant is
adopted as the damage measure. This value determines creep acceleration as
the instant of fracture is approached and also the condition of its
realization. The efficiency of the model is demonstrated by means of
comparison with experimental and theoretical results found from literature
(works of Murakami and Delobelle with coauthors) on creep and long-term
strength of copper at 250C° and stainless steel at 600C° under joint action of constant tension and alternating torsion. |
References |
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|
Received |
21 January 2001 |
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