Open AccessDevelopment of statistical methods to highlight differences between endurance limit of re-rolled steel sheets in an assumed homogeneous population
Author(s) -
Marianna Beghini,
Bernardo Disma Monelli,
Marco Barsanti,
Giuseppe Macoretta,
A Piccinocchi
Publication year - 2022
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/1214/1/012017
Subject(s) - homogeneous , limit (mathematics) , sheet metal , gaussian , set (abstract data type) , fatigue limit , materials science , statistical analysis , normal distribution , structural engineering , mathematics , metallurgy , statistics , computer science , engineering , composite material , mathematical analysis , physics , combinatorics , quantum mechanics , programming language
In this paper, we present the results of the activities carried out to estimate the axial fatigue strength of ASTM E566 Gr. 70 sheet metal. We describe the experimental setup, followed by the collected data. To highlight a possible inhomogeneity in some of the material properties, we estimate the endurance limit for the investigated material using various statistical approaches on the set of test articles. The data analysis was carried out both by considering as a whole the set of test articles and by dividing the set into two groups. As a new analysis technique, we propose a method introducing a bimodal distribution (Gaussian mixture).