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Refining the
thermoplasticity theory for modeling of cyclic nonisothermic
loading processes
Valentin S. Bondar and Dmitry R. Abashev |
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Vol. 16 (2021), No. 4, 501–510
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Abstract |
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The research team carried out experimental analysis of the 12X18H10T stainless steel specimens subjected to strain-controlled cyclic loading under uniaxial tension–compression and changeable temperature. In order to describe experiment results in terms of the thermoplasticity theory (the Bondar model), which can be classified as a combined hardening flow theory, the material functions are determined by baseline experiment results under a constant temperature. The paper further formulates the fundamentals and basic equations of the thermoplasticity theory. It presents material functions to close the thermoplasticity theory for the 12X18H10T steel at varying temperatures. Then, it analyzes the modeled and experimental results of subjecting the 12X18H10T steel to strain-controlled cyclic deformation by isothermal and nonisothermal loading until the specimens break down. The subject matter of analysis is the range of in-cycle stress values as induced by nonisothermal cyclic loading. Computational and experimental results fit reliably. |
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Keywords
nonisothermal cyclic loading, flow plasticity theory, low
cycle fatigue
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Milestones
Received: 26 March 2020
Revised: 14 April 2021
Accepted: 23 May 2021
Published: 9 November 2021
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Authors |
| Valentin S. Bondar | |
| Department of Technical
Mechanics Moscow Polytechnic University Moscow Russia |
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| Dmitry R. Abashev | |
| Department of Technical
Mechanics Moscow Polytechnic University Moscow Russia |
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