Project TJ04000301 – Non-destructive Determination of Mechanical Stress in Continuous Welded Rail.
| Grant support: | 4th call of the TA ČR Zéta programme. |
| Duration: | 1st May 2020 – 30th April 2022. |
News:
14th July 2022
The project was evaluated as a successful one.
26th May 2022
We submitted the final report of the project.
29th April 2022
Miloš and Ondřej finished experimental development of a functioning sample – Microcomputer controlled thermometer. Information leaflet is available for download below.
| Files for download | Size |
|---|---|
| Microcomputer controlled thermometer. - pdf | 769 kB |
8th April 2022
We organised a seminar of technology transfer into the application sphere. More information on the seminar is available on the dedicated webpage.
7th March 2022
We finished another outcome of the project, a methodology named Methodology of Non-destructive Determination of Mechanical Stress in Continuous Welded Rail.
| Files for download | Size |
|---|---|
| Methodology of Non-Destructive Determination of Mechanical Stress in Continuous Welded Rail. - pdf | 17.89 MB |
| Certificate of Approval of the Methodology (in Czech only). - pdf | 257 kB |
2nd March 2022
We performed an additional measurement before and after track tamping at the occasion of a track closure in Hostinné – Trutnov railway line section. In collaboration with Filip Ševčík from the Department of Transport Structures, we have furthermore performed a geometrical track parameters measurement using a Krab measuring trolley.
1st December 2021
In the measuring site of Bezpráví, we performed a test of various measurement methods in order to select suitable ones for performing 72 hours continuous measurement of longitudinal displacement of continuous welded rail after setting into operation.
8th November 2021
We finished experimental development of functioning sample – Measuring set for diagnostics of time-based development of stress states in continuous welded rail. Information leaflet is available for download below.
| Files for download | Size |
|---|---|
| Measuring set for diagnostics of time-based development of stress states in continuous welded rail. - pdf | 10.02 MB |
31st August 2021
Fourth and last big strain gauge installation was held on the last day of August. This time, we installed 16 strain gauges on modernized 1st railway track of the corridor line in the section Ústí nad Orlicí – Brandýs nad Orlicí on this rainy day, in the vicinity of the Bezpráví railway halt.
23rd July 2021
We installed further 44 strain gauges into the railway line section Chotěvice – Pilníkov. We made use of the single strain gauge connection tested in Ostopovice.
3rd July 2021
Petr Vnenk inspected what could be considered a likely next installation site of strain gauges into track. It is a section between Chotěvice and Pilníkov stops of the Velký Osek – Trutnov railway line.
28th June 2021
Petr Vnenk installed two thermal probes into locations between Karviná and Louky nad Olší. Next eleven probes will be installed by the team members in other locations in the coming weeks.
28th May 2021
We installed further 16 strain gauges into the railway line section Brno – Střelice. On those strain gauges, we have newly tested single strain gauge connection compensated with measuring amplifier.
27th April 2021
We made use of a railway line closure near to Borovnice and performed strain gauge measurements before and after railway track tamping. With kind help of fellow researchers from the Department of Transport Structures, we have performed geodetic measurements with a total station and measuring trolley Krab to investigate alignment changes of the track, which will provide us with additional data.
1st April 2021
Welcome, Ondřej Sadílek and Filip Klejch, new fellow researchers, to our research team.
6th February 2021
Özgür Yurdakul and Petr Vnenk have prepared new five-meter-long cables that will provide more practical procedures on strain gauge measurements in further locations.
10th December 2020
With help of time-lapse pictures captured by Jiří Šlapák, Petr Vnenk prepared popularization lecture for schoolchildren within the scope of the Vědění mladým 2020 (Knowledge to the Young 2020 – eng. transl.) conference. Topic of the lecture was axial stress in continuous welded rail. This lecture can be viewed at the conference webpage: https://www.upce.cz/konference-vedeni-mladym-2020.
19th November 2020
Rails were welded in the Borovnička–Borovnice railway line section and we can, therefore, commence the strain gauge measurement. It will be performed daily in the early stage, later weekly, and starting from 17th December, we will measure in the indicated location on a monthly basis.
15th November 2020
We have installed the first 96 strain gauges into the railway line section Borovnička–Borovnice. We have placed a pair of strain gauges – active and dummy – on both sides of both rails in one cross-section. This all we have repeated in twelve cross-sections in total. Nine research team members took part during installation.
3rd November 2020
We finish the last series of dummy strain gauges. There were in total 160 dummy strain gauges prepared in the laboratories of the Educational and Research Centre in Transport.
24th October 2020
Petr Vnenk went to inspect the location of the likely first installation of strain gauges into a railway line, i. e. railway line section between the stops Borovnička and Borovnice on the railway line Pardubice – Liberec.
15th October 2020
We glue each dummy strain gauge on a steel plate and add two layers of paint and putty with aluminium foil.
30th September 2020
Vladimír Suchánek, Karel Suchý, Tadeáš Šustr and Miloš Šula attached the first version of rail thermometer on rail foot in the area of Educational and Research Centre in Doubravice (ERTC). Production of thermomenters and their rebuilding for alkalic (exchangeable) batteries continues.
21st September 2020
We continue in testing of the measurement chain in the area of Educational and Research Centre in Transport in Doubravice. We have successfully tested the first version of the connector for transmission of signal from strain gauges into the data acquisition system and connection of the whole measurement system to a 12 V power supply.
11th September 2020
Petr Vnenk and Özgür Yurdakul continue in dummy strain gauge production. Strain gauges will be glued on steel plates, made ready in the laboratory and eventually installed on a railway track.
12th August 2020
Petr Vnenk took part in the measurement of influence of several parameters on rail temperature in Vrútky, Slovakia. The measurement was organized by Ing. Ďurkovský from ŽSR (Slovak railway infrastructure manager). It brought many interesting results, which will be a subject of further analysis.
29th July 2020
Jiří Šlapák designed a 3D printed practical template for quick lookup of the neutral axis on rails of 60E1 and 60E2 types. The template takes into account the possible deformation of worn rail and can be therefore used in track with both new and worn rails. We are able to produce templates for other various types of rails as soon as they will be needed.
21st July 2020
Özgür Yurdakul, Zdeněk Sháněl and Petr Vnenk prepared a testing sample of rail with strain gauges for testing of strain gauge measurement before it will be installed on the track.
25th June 2020
Petr Vnenk, Bohumil Culek, Ladislav Řoutil and Özgür Yurdakul had a technical meeting to discuss the details for performing the strain gauge and temperature measurement.
22nd June 2020
Petr Vnenk met with Ing. Ďurkovský, an expert on continuous welded rail from ŽSR (Slovak railway infrastructure manager), Žilina. They have discussed possible implementation of the strain gauge measurements on continuous welded rail and agreed on further collaboration.
9th June 2020
Petr Vnenk, Ladislav Řoutil and Özgür Yurdakul met with Ing. Stehlík from the Ministry of Transport of the Czech Republic in Prague and introduced him the work that has been done and the closest outlook. The ministry is an application guarantor to the project.
4th June 2020
Petr Vnenk and Bohumil Culek met with Ing. Szabó and Ing. Táborský from Správa železnic (Czech railway infrastructure manager) in Pardubice. They have agreed on furter steps and search for suitable locations of field measurements. Správa železnic is an application guarantor to the project.
12th May 2020
Starting squad of the research team held in full representation their common meeting for the first time.
1st May 2020
Start of working on the project.
