Open AccessSmoothed Podgórski Strength Criterion
Author(s) -
Aleksander Szwed,
Inez Kamińska
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/661/1/012001
Subject(s) - convexity , calibration , limit (mathematics) , mathematics , plasticity , function (biology) , experimental data , limit state design , surface (topology) , computer science , statistics , mathematical analysis , structural engineering , geometry , engineering , materials science , evolutionary biology , financial economics , economics , biology , composite material
A modification of the Podgórski limit state criterion is proposed in order to smoothen the plasticity surface allowing for application of the yield function in plastic evolution law. Convexity of the potential is discussed and calibration of five material parameters is carried out using common experimental tests, while two parameters remain arbitrary. Comparison of the model prediction with the available empirical data for concrete is presented and then recommendations are given in reference to the values of two arbitrary chosen parameters.