On the influence of the stress state on the deformation of construction materials

• Published in: Visnyk Kyïvsʹkoho universytetu. Serii͡a︡--Fizyko-matematychni nauky (2009) no. 4; pp. 66 - 69
• Main Author: Romanov, O. V.
• Format: Journal Article
• Language: English
• Published: 2021
• ISSN: 1812-5409; 2218-2055
• DOI: 10.17721/1812-5409.2021/4.10

The question of the influence of the type of stress state (TSS) on the process of scleronomic and rheonomic deformation of structural materials under simple and close to simple loading conditions is considered. The parameters characterizing the TSS are indicated. This is a parameter (indicator) of the rigidity of the stress state, which reflects the influence of the first invariant of the stress tensor and is, with an accuracy of a constant factor, the ratio of the hydrostatic component of the stress tensor to its deviator component. The influence of the third invariant of stress tensors is taken into account by a number of parameters – the Nadai-Lode parameter, as well as the TSS angle in its various interpretations. A variant of taking this influence into account by introducing the governing equation of state of the function with the parameter of the TSS angle is shown. This function is determined based on analysis of basic tensile and torsion experiments. It is shown that taking into account VNS increases the accuracy of the calculation and improves the agreement between the calculation results and experiment.