MODELING OF NON-STATIONARY CREEP PROCESSES UNDER MULTIPLE LOADING CONDITIONS BY TAKING INTO ACCOUNT DAMAGE ACCUMULATION IN A STRUCTURAL MATERIAL

被引：1

作者：

Volkov, I. A. ^{[1
]}

Igumnov, L. A. ^{[1
]}

Shishulin, D. N. ^{[1
]}

Boev, E., V ^{[1
]}

机构：

[1] Natl Res Lobachevsky State Univ Nizhny Novgorod, Nizhnii Novgorod 603022, Russia

来源：

MECHANICS OF SOLIDS | 2022年 / 57卷 / 02期

关键词：

long-term strength; material creep; mathematical modeling; damaged medium mechanics; creep model parameters; experimental data and numerical simulation; LONG-TERM STRENGTH;

D O I：

10.3103/S0025654422020224

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The article considers the problem on assessing the kinetics of the stress-strain state and the process of damage accumulation in polycrystalline structural materials of units and assemblies of engineering objects, the operational impacts of which are characterized by a highly loaded state under the influence of non-stationary long-term thermal force loading, where the main degradation mechanism is material creep. A mathematical model is presented. It is based on the concepts of the mechanics of a damaged medium and makes it possible to describe processes during unsteady creep under complex loading conditions and the main hypotheses underlying the mathematical model. By comparing the results of a numerical simulation with experimental data, a proof of the applicability of the mathematical model for uniaxial and multiaxial sign-variable loading conditions is given.

引用

页码：223 / 231

页数：9

共 38 条

[1] MODELING OF NON-STATIONARY CREEP PROCESSES UNDER MULTIPLE LOADING CONDITIONS BY TAKING INTO ACCOUNT DAMAGE ACCUMULATION IN A STRUCTURAL MATERIAL
I. A. Volkov
L. A. Igumnov
D. N. Shishulin
E. V. Boev
[J]. Mechanics of Solids, 2022, 57 : 223 - 231
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[7] THE INFLUENCE OF CAVITATION DAMAGE UPON HIGH-TEMPERATURE CREEP UNDER STATIONARY AND NON-STATIONARY LOADING CONDITIONS .2. TENSILE CREEP AT CONSTANT LOAD AND CONSTANT TRUE STRESS RESP
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[8] THE INFLUENCE OF CAVITATION DAMAGE UPON HIGH-TEMPERATURE CREEP UNDER STATIONARY AND NON-STATIONARY LOADING CONDITIONS .4. CYCLIC CREEP AT CONSTANT LOAD AMPLITUDE AND CONSTANT TRUE STRESS AMPLITUDE
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[9] Nonlinear modeling of a misaligned rotor under non-stationary operating conditions
Rokn-Abadi, Mohammad
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[J]. JOURNAL OF VIBRATION AND CONTROL, 2024, 30 (9-10) : 2019 - 2033
[10] Modeling & analysis of software defined networks under non-stationary conditions
Navya Vuppalapati
T. G. Venkatesh
[J]. Peer-to-Peer Networking and Applications, 2021, 14 : 1174 - 1189

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