A whole system model framework to predict damage in turnouts

Six, Klaus; Sazgetdinov, Kamil; Kumar, Nishant; Müller, Gabor; Velic, Dino; Daves, Werner; Skrypnyk, Rostyslav; Pålsson, Björn

doi:10.1080/00423114.2021.1988116

Cited by 10 publications

(4 citation statements)

References 25 publications

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“…The grey horizontal and vertical lines indicate the different Archard wear regimes for a fixed train velocity of 70 km/h. The wear maps on the right hand side are exclusively valid for the stated constant wear coefficient of 4x10 -3 , which is a typical mean value for the severe wear regime reported in literature [5,7]. The presented wear depths occur after one passage of the contact patch and are intended for relative comparison of the severity of different working points with respect to wear.…”

Section: Resultsmentioning

confidence: 95%

“…The numerical approach to assess the wear and RCF behaviour consists of three major steps, as shown in Figure 2. Firstly, the contact loads along the switch rail are evaluated from the local dynamic finite element model adapted from Velic et al [5]. A total of 100 load cycles is simulated with ten different wheel types including measured so-called unworn, worn and hollow profiles.…”

Section: Methodsmentioning

confidence: 99%

“…The switch rails connect the switch panel at the front of the turnout and the crossing panel at the rear [3]. Due to the direction change of the train when passing the turnout in the diverging route, high lateral and creep forces are generated between wheel and rails [4,5]. In the contact, these forces induce locally high contact stresses and cause slip or creepage.…”

Section: Introductionmentioning

confidence: 99%

“…This numerical work estimates the wear and RCF behaviour of two different finepearlitic rail steels (R350HT and 400 UHC® HSH®) in the switch panel of a standard 60E1-500-1:12 turnout. To this end, a finite element analysis is performed to calculate the local contact loads during the first contact of the wheel on the switch rail, adopted from [5]. These contact loads are extracted to investigate the local damage near the surface of the switch rail.…”

Section: Introductionmentioning

confidence: 99%

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Wear and RCF assessment in switch rails for different materials

Schnalzger,

Gapp,

Ossberger

et al.

Civil-Comp Conferences

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Switch rails are severely loaded components in the railway turnout. This work presents a numerical framework to assess the wear and rolling contact fatigue (RCF) for two different pearlitic switch rail materials. Firstly, a cyclic finite element analysis (FEA) is performed calculating the local loads during the first contact of different wheels on the switch rail. Secondly, local wear and RCF models for the investigated steel grades R350HT and 400 UHC® HSH® are determined and their output is visualized in damage maps. After that, the local contact parameters maximum contact pressure, creepage and contact length are extracted from the FEA considering these different wheel profiles and different rail materials. The calculations deliver local contact loads on the switch surface, which are marked in the damage maps. This allows the comparison of R350HT and 400 UHC in relation to their damage susceptibility. Both show a very similar damage response to the contact loading in the switch rail. Wear and surface RCF are the dominating damage patterns. Subsurface RCF is only predicted for some local cases. In total, 400 UHC® HSH® exhibits a higher resistance against wear and RCF. Regarding the wheel types, the worn wheels are identified as most critical for the damage in the switch rail.

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Section: Resultsmentioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%