Ductile fracture of notched aluminum alloy specimens under elevated temperature P. 2 Numerical modelling and fracture criterion
Łukasz Derpeński , Andrzej Seweryn
AbstractPaper presents the results of the numerical modelling of axisymmetric specimens with circumferential notchesmade of aluminum alloy EN-AW 2024 T3 under elevated temperature. A range of notch rood radii (rK= 0.5, 2,4, 8, 30 mm) is considered. The specimens underwent monotonic uniaxial loading at elevated temperature 20,100, 200 and 300 °C. Stress and strainfields in whole specimens were calculated usingfinite element analysis(FEM). Axisymmetricfinite element mesh model built of four-node elements with a bilinear shape function wasused in simulations. The aim of these calculations were to determine the location of maximum stress and plasticstrain in the specimen depending on the notch radius and the elevated temperature. Significant attention waspaid to influence on distributions of stresses and plastic strains under uniaxial loading, elevated temperature andnotch radius. It has been shown that the location of maximum stresses and plastic strains depends only on thenotch radius where their value depends both on the notch radius and on the temperature. The main aim of theseresearch was to develop new ductile fracture criterion for notched specimens taking into account elevatedtemperature and uniaxial loading. In this criterion assumed that the fracture initiation occurs when the normalstress on this physical plane reaches the critical value, depending on the isotropic damage state variableω,generated by plasticflow of the material (depending on the temperature).
|Journal series||Theoretical and Applied Fracture Mechanics, ISSN 0167-8442, e-ISSN 1872-7638, (N/A 100 pkt)|
|Publication size in sheets||0.7|
|Keywords in English||ductile fracture, elevated temperature, specimen with notches, uniaxial loading, fracture criterion, aluminum alloy|
|ASJC Classification||; ; ;|
|Internal identifier||ROC 19-20|
|Score||= 100.0, 12-02-2020, ArticleFromJournal|
|Publication indicators||: 2017 = 1.466; : 2018 = 2.848 (2) - 2018=2.934 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.