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Abstract
The methodology for calculating the contact stress state for various contact types of frogs and wheel is presented. The magnitudes of contact stresses in the frogs can be calculated according to the Hertz-Belyaev method, taking into account certain evaluating factors.
Highlights
An increase in axial loads, train speeds, and railway load carrying capacity increases the failure of frogs due to contact fatigue damage [1, 2]
In order to successfully solve this problem, it is necessary to know the magnitude of the contact stresses arising in the frogs from the wheels of the rolling stock
The values of contact stresses in the frogs can be obtained by using the formulas σ = kσσ∗ and τ = kττ∗, where kσ, kτ are the transition coefficients; σ∗, τ∗ * are the corresponding stresses obtained by calculation according to the
Summary
An increase in axial loads, train speeds, and railway load carrying capacity increases the failure of frogs due to contact fatigue damage [1, 2]. The contact of the wheel and the frog belongs to the class of problems, for which the premises of the Hertz-Belyaev theory are not fully satisfied There are such features as the commensurability of the radii of the contacting bodies; the proximity of the contact pad to the edge of the side edge; the commensurability of the contacting body radius and the width of the contact pad, etc. It is possible to take into account these features with the help of a system of evaluation coefficients for the calculated values, which can be obtained according to the Hertz-Belyaev theory.
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