Coupled elastoplasticity and viscoplasticity under thermomechanical loading
Nagode, Marko (Author), Fajdiga, Matija (Author)

URLURL - Presentation file, Visit http://dx.doi.org/10.1111/j.1460-2695.2007.01121.x This link opens in a new window

This paper is a contribution to material behaviour modelling. Total strain is decomposed into elastoplastic and viscoplastic strains. Both parts are analysed separately and put together by the principle of superposition. The spring-slider model controlled by either stress or strain enables elastoplasticity modelling under constant or variable temperature with the Prandtl operators. Viscoplasticity is taken into account, if temperature exceeds creep temperature, by adding a nonlinear damper to existing spring-slider models, otherwise just elastoplasticity is considered. The material parameters result from isothermal strain-controlled low cycle fatigue(LCF) tests. Hysteresis loops are assumed to be stabilized. The high speed of computation that is characteristic of Masing and memory rules is retained. Solving of differential equations is not required. The model developed so far is uniaxial, but a multiaxial extension is possible.

Keywords:termomehansko utrujanje, enačbe, elastoplastičnost, viskoplastičnost, constitutive equations, elastoplasticity, thermomechanical loading, viscoplasticity
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Number of pages:str. 510-519
Numbering:Letn. 30, št. 6
ISSN on article:8756-758X
COBISS.SI-ID:10086939 Link is opened in a new window
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Record is a part of a journal

Title:Fatigue & fracture of engineering materials & structures
Shortened title:Fatigue fract. eng. mater. struct.
Publisher:Blackwell Publishing
COBISS.SI-ID:584210 This link opens in a new window

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