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Numerical methods for TMF cycle modeling
Zaletelj, Henrik (Author), Fajdiga, Gorazd (Author), Nagode, Marko (Author)

URLURL - Presentation file, Visit http://www.dlib.si/details/URN:NBN:SI:doc-GKBHZYO3 New window

Abstract
Experimental tests for the endurance evaluation of the machine parts that are exposed to thermomechanical fatigue (TMF) require advanced and expensive testing machines. Numerical methods for the determination of stress-strain material behavior have become very frequent and known due to lower costs. There are several different approaches for the determination of stress-strain behavior. In the article three different numerical methods and their results are presented. The numerical results for different load conditions are compared with the experimental results and the accuracy of the methods can be compared. The Chaboche, Skelton and Prandtl operator approaches are presented, presuming a stabilized elastoplastic response and not including creep. The properties of the model, their weaknesses and possible improvements are also studied in the paper.

Language:English
Keywords:ciklično obremenjevanje, elastoplastična analiza, kinematično utrjevanje, napetostno-deformacijsko stanje, termomehansko utrujanje, cyclic loading, elastoplasticity, kinematic hardening, stress-strain trajectory, thermomechanical fatigue
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2011
Publisher:= Association of Mechanical Engineers and Technicians of Slovenia et al.
Number of pages:str. 485-494
Numbering:Vol. 57, no. 6
UDC:620.1:539.3
ISSN on article:0039-2480
DOI:10.5545/sv-jme.2010.212 Link is opened in a new window
COBISS.SI-ID:11872795 Link is opened in a new window
Views:469
Downloads:228
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Record is a part of a journal

Title:Strojniški vestnik
Shortened title:Stroj. vestn.
Publisher:Zveza strojnih inženirjev in tehnikov Slovenije [et al.], = Association of Mechanical Engineers and Technicians of Slovenia [et al.]
ISSN:0039-2480
COBISS.SI-ID:762116 New window

Secondary language

Language:English
Abstract:
Eksperimentalno preverjanje vzdržljivosti strojnih delov, ki so izpostavljeni termomehanskim obremenitvam, zahteva napredno in drago merilno opremo. Pri določevanju napetostno-deformacijskega odziva materiala so zato vse bolj uveljavljene in uporabne numerične metode. Obstaja več različnih metod določevanja napetostno-deformacijskega odziva materiala. V članku so predstavljeni rezultati treh različnih numeričnih modelov. Predstavljeni so Chabocheov, Skeltonov in numerični model s Prandtlovimi operatorji, kjer je upoštevan elastoplastični odziv materiala ob neupoštevanju vpliva lezenja. Rezultati numeričnih modelov za različna obremenitvena stanja so primerjani z eksperimentalnimi rezultati. Predstavljene so lastnosti modelov, njihove slabosti in možne izboljšave ...


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