DOI: https://doi.org/10.32347/2410-2547.2019.102.180-190

Thermal elastic deformation of the layered covering on the concave part of a road

Viktor Gaidaichuk, Oleksandr Gustieliev, Anatolii Radkevich, Liudmyla Shevchuk, Nataliia Shlyun

Abstract


The problem on numerical investigation of thermo-elastic deformation of a layered coating on the concave and rectilinear road parts is stated. The constitutive equations are formulated, their finite-element analogues are constructed. The load versions at different values of geometric, structural, and temperature parameters are taken into account.

The influence of the door curvature on redistribution of the stress fields under action of thermal perturbations are analysed. As in  a  uniform heating (or cooling) the curvilinear layers change their lengths in different manure, then it can be supposed that even under small concentration in all direction of the road body are exhibited. At that, for the rectilinear segments of the roads, the stress, normal to the road surface, practically are equal to zero. With the curvature enlargement, the enlargement of tensile normal stress throughout the road length is observed. This lead to enlargement of the probability of the breakaway of the first layer from the second one.

It is shown by numerous calculations that the peak values of the longitudinal ensile forces in the top layer and shear forces localized between the first and second layers can be a cause of the initial road destruction observed in practice and formation of transversal cracks.


Keywords


automobile road; road coating structure; transport loads; stress field; thermo elastic state

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