MATEC Web Conf.
Volume 253, 20192018 International Conference on Materials Science and Manufacturing Engineering (MSME 2018)
|Number of page(s)||6|
|Section||Material Properties & Characterization|
|Published online||14 January 2019|
Study of Strain-Softening Stage in Structurally Inhomogeneous Materials
Institute of Engineering Science, RAS (Ural Branch), 620049, 34 Komsomolskaya st., Yekaterinburg, Russia
2 Ural Federal University, 620002, 19 Mira Street, Yekaterinburg, Russia
a Corresponding author : email@example.com
The paper considers – in terms of modeling and experimental testing – the softening stage manifested in structurally inhomogeneous materials under quasi-static and cyclic load. The method which is used to build the theoretical basis is typical for mechanics. It starts with defining a new material property – strain-softening phase. The stage is realized in the form of a descending branch of the curve on computer diagrams recorded during simple tension or torsion tests on non-reusable specimens in a reasonably rigid testing machine. The type of such a diagram is determined by the structural inhomogeneity of a material, which is defined by distribution law for strength and plasticity properties of structural elements. Complete stress-strain curves or diagrams (CSSD) with a branch descending to zero have been plotted for materials of various classes. Degradation of parameters of a descending branch on a computer diagram recorded for trained specimens provides a new angle on the subject of relation between static and cyclic material properties. The experiments and modeling which were carried out provide basic understanding of softening in terms of deformation.
© The Authors, published by EDP Sciences, 2019
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