Modeling the Average and Instantaneous Friction Coefficient of a Disc Brake on the Basis of Bench Tests
This article presents the results of tests conducted on the average and instantaneous friction coefficients of railway vehicle disc brakes. The tests were carried out independently of various states of wear on the friction linings and the brake disc. The requirements of the International Union of Ra...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-08-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/14/16/4766 |
| _version_ | 1797523089609719808 |
|---|---|
| author | Wojciech Sawczuk Armando Miguel Rilo Cañás Dariusz Ulbrich Jakub Kowalczyk |
| author_facet | Wojciech Sawczuk Armando Miguel Rilo Cañás Dariusz Ulbrich Jakub Kowalczyk |
| author_sort | Wojciech Sawczuk |
| collection | DOAJ |
| description | This article presents the results of tests conducted on the average and instantaneous friction coefficients of railway vehicle disc brakes. The tests were carried out independently of various states of wear on the friction linings and the brake disc. The requirements of the International Union of Railways (UIC) regarding the approval of brake linings for use were taken into account. Based on many years of research using a brake bench to test railway disc brakes, the authors developed multiple regression models for the average friction coefficient and fluctuations (tolerances) in the instantaneous friction coefficient and achieved 870 results. The models proposed three types of variables: the input braking parameters (speed, pressure, and mass to be braked), operational parameters (the wear on the friction linings and the brake disc), and design parameters (perforations in the form of holes on the disc surface). The above two models were validated on the basis of 384 brakes, and in subsequent stages a further evaluation was performed. The coefficients were determined to be, respectively, 0.99 for the model of the average friction coefficient and 0.71 for the model of tolerance (fluctuations) of the instantaneous friction coefficient. |
| first_indexed | 2024-03-10T08:38:30Z |
| format | Article |
| id | doaj.art-d8e29eb76497472580afba7760008e13 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T08:38:30Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-d8e29eb76497472580afba7760008e132023-11-22T08:32:31ZengMDPI AGMaterials1996-19442021-08-011416476610.3390/ma14164766Modeling the Average and Instantaneous Friction Coefficient of a Disc Brake on the Basis of Bench TestsWojciech Sawczuk0Armando Miguel Rilo Cañás1Dariusz Ulbrich2Jakub Kowalczyk3Faculty of Transport and Civil Engineering, Institute of Transport, 60-965 Poznan, PolandDB Systemtechnik GmbH, 14774 Berlin, GermanyFaculty of Transport and Civil Engineering, Institute of Machines and Motor Vehicles, 60-965 Poznan, PolandFaculty of Transport and Civil Engineering, Institute of Machines and Motor Vehicles, 60-965 Poznan, PolandThis article presents the results of tests conducted on the average and instantaneous friction coefficients of railway vehicle disc brakes. The tests were carried out independently of various states of wear on the friction linings and the brake disc. The requirements of the International Union of Railways (UIC) regarding the approval of brake linings for use were taken into account. Based on many years of research using a brake bench to test railway disc brakes, the authors developed multiple regression models for the average friction coefficient and fluctuations (tolerances) in the instantaneous friction coefficient and achieved 870 results. The models proposed three types of variables: the input braking parameters (speed, pressure, and mass to be braked), operational parameters (the wear on the friction linings and the brake disc), and design parameters (perforations in the form of holes on the disc surface). The above two models were validated on the basis of 384 brakes, and in subsequent stages a further evaluation was performed. The coefficients were determined to be, respectively, 0.99 for the model of the average friction coefficient and 0.71 for the model of tolerance (fluctuations) of the instantaneous friction coefficient.https://www.mdpi.com/1996-1944/14/16/4766railway disc brakefriction coefficientmultiple regression |
| spellingShingle | Wojciech Sawczuk Armando Miguel Rilo Cañás Dariusz Ulbrich Jakub Kowalczyk Modeling the Average and Instantaneous Friction Coefficient of a Disc Brake on the Basis of Bench Tests Materials railway disc brake friction coefficient multiple regression |
| title | Modeling the Average and Instantaneous Friction Coefficient of a Disc Brake on the Basis of Bench Tests |
| title_full | Modeling the Average and Instantaneous Friction Coefficient of a Disc Brake on the Basis of Bench Tests |
| title_fullStr | Modeling the Average and Instantaneous Friction Coefficient of a Disc Brake on the Basis of Bench Tests |
| title_full_unstemmed | Modeling the Average and Instantaneous Friction Coefficient of a Disc Brake on the Basis of Bench Tests |
| title_short | Modeling the Average and Instantaneous Friction Coefficient of a Disc Brake on the Basis of Bench Tests |
| title_sort | modeling the average and instantaneous friction coefficient of a disc brake on the basis of bench tests |
| topic | railway disc brake friction coefficient multiple regression |
| url | https://www.mdpi.com/1996-1944/14/16/4766 |
| work_keys_str_mv | AT wojciechsawczuk modelingtheaverageandinstantaneousfrictioncoefficientofadiscbrakeonthebasisofbenchtests AT armandomiguelrilocanas modelingtheaverageandinstantaneousfrictioncoefficientofadiscbrakeonthebasisofbenchtests AT dariuszulbrich modelingtheaverageandinstantaneousfrictioncoefficientofadiscbrakeonthebasisofbenchtests AT jakubkowalczyk modelingtheaverageandinstantaneousfrictioncoefficientofadiscbrakeonthebasisofbenchtests |