Simulation of High-Temperature Isothermal Elasto-Plastic Deformation Processes of Testing Samples

Authors: Temis Yu.M., Khudyakova A.D. Published: 05.12.2017
Published in issue: #6(117)/2017  

DOI: 10.18698/0236-3941-2017-6-49-67

Category: Mechanics | Chapter: Mechanics of Deformable Solid Body  
Keywords: plasticity, plastic flow, complex deformation, stress-strain state, mechanical tests, tube specimen

The model of elastoplastic behaviour of a material with account taken of creep is applied to modeling of isothermal processes of testing samples at high temperatures. In our research we obtained the dependences of the relationship between the increments of elastic and plastic deformations and creep strains with stress increments according to the relations of flow theories. This paper shows some features of the software implementation of the model, taking into account the error correction for calculation beyond the elastic limit. We developed methods for determining the plasticity and creep parameters for a model of the Arutyunyan --- Vakulenko type and creep flow type models. We carried out the sample loading modeling along the trajectories of deformation changes for different values of the constant temperatures, including elevated temperatures, at which creep effects are manifested


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