Nonlinear endochronic creep models taking into account the type of stress state

International Workshop "Advanced Technologies in Material Science, Mechanical and Automation Engineering – MIP: Engineering – 2019"

材料科学;机械制造;原子能学

Pomytkin, S.P.^1 ; Vershinina, L.P.^1 ; Rozhkov, N.N.^2

Saint-Petersburg State University of Aerospace Instrumentation, Bolshaya Morskaia str. 67 A, St. Petersburg

190000, Russia^1

Saint-Petersburg State University of Industrial Technologies and Design, Bolshaya Morskaia str. 18, St. Petersburg

191186, Russia^2

关键词: Creep model;    Creep theory;    Materials behavior;    Nonlinear constitutive relation;    Presented examples;    Type of stress state;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/537/4/042083/pdf
DOI  :  10.1088/1757-899X/537/4/042083

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In the framework of the endochronic approach, two variants of the tensor-parametric nonlinear constitutive relations of the creep theory are proposed. These equations take into account the dependence of the materials behavior on the type of stress state, as well as large deformations and rotations. The constitutive equations of proposed models are applied to explain some effects in the classic creep. It is shown that the results of simulating of uniaxial isothermal creep are in agreement with experimental observations. Presented examples demonstrate the possibilities and a potential of the approach.