TY  - CONF
AU  - Tanasković, Jovan
AU  - Franklin, Francis J.
AU  - Banić, Milan
AU  - Milković, Dragan
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5965
AB  - Development of passive safety elements represents one of the most complex fields of mechanical engineering
and requires practical and theoretical knowledge equally. A new standard EN15227 directed at railway vehicle
structures defines the dimensions and phases of deformation of the end-of-vehicle structure during collision.
Serbian railways have many passenger wagons over 20 years old that have no crash elements. These wagons
are equipped with a standard buffer in accordance with UIC regulations. The challenge, therefore, is to install
crash elements in line with the standard buffer as well as to define a moment when the crash element starts
energy absorption. A shrinking tube absorber has the most acceptable absorption characteristics as well as
being compact and compatible with the dimensions of standard buffer. In this research, the joint between the
standard buffer and the collision energy absorber is a shearing ring designed to break in a specific way at a
specific force. The standard buffer is designed to withstand a force of 800 kN without permanent deformation.
When the force exceeds this value, the spring in the standard buffer is blocked and the shearing ring breaks,
activating the energy absorber. The shearing ring is made from quenched and tempered carbon steel that has
passed adequate thermal treatment. Dimensioning of the shearing ring required a series of experiments to
determine mechanical characteristics using reduced- and full-scale samples. Final verification of dimensions
and working principles of shearing ring was done via collision of two passenger coaches.
PB  - novation Center of Faculty of Mechanical Engineering
C3  - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2019, The book of Abstract
T1  - Experimental research of characteristics of shearing ring
EP  - 37
SP  - 37
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5965
ER  - 

@conference{
author = "Tanasković, Jovan and Franklin, Francis J. and Banić, Milan and Milković, Dragan",
year = "2019",
abstract = "Development of passive safety elements represents one of the most complex fields of mechanical engineering
and requires practical and theoretical knowledge equally. A new standard EN15227 directed at railway vehicle
structures defines the dimensions and phases of deformation of the end-of-vehicle structure during collision.
Serbian railways have many passenger wagons over 20 years old that have no crash elements. These wagons
are equipped with a standard buffer in accordance with UIC regulations. The challenge, therefore, is to install
crash elements in line with the standard buffer as well as to define a moment when the crash element starts
energy absorption. A shrinking tube absorber has the most acceptable absorption characteristics as well as
being compact and compatible with the dimensions of standard buffer. In this research, the joint between the
standard buffer and the collision energy absorber is a shearing ring designed to break in a specific way at a
specific force. The standard buffer is designed to withstand a force of 800 kN without permanent deformation.
When the force exceeds this value, the spring in the standard buffer is blocked and the shearing ring breaks,
activating the energy absorber. The shearing ring is made from quenched and tempered carbon steel that has
passed adequate thermal treatment. Dimensioning of the shearing ring required a series of experiments to
determine mechanical characteristics using reduced- and full-scale samples. Final verification of dimensions
and working principles of shearing ring was done via collision of two passenger coaches.",
publisher = "novation Center of Faculty of Mechanical Engineering",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2019, The book of Abstract",
title = "Experimental research of characteristics of shearing ring",
pages = "37-37",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5965"
}

Tanasković, J., Franklin, F. J., Banić, M.,& Milković, D.. (2019). Experimental research of characteristics of shearing ring. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2019, The book of Abstract
novation Center of Faculty of Mechanical Engineering., 37-37.
https://hdl.handle.net/21.15107/rcub_machinery_5965

Tanasković J, Franklin FJ, Banić M, Milković D. Experimental research of characteristics of shearing ring. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2019, The book of Abstract. 2019;:37-37.
https://hdl.handle.net/21.15107/rcub_machinery_5965 .

Tanasković, Jovan, Franklin, Francis J., Banić, Milan, Milković, Dragan, "Experimental research of characteristics of shearing ring" in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2019, The book of Abstract (2019):37-37,
https://hdl.handle.net/21.15107/rcub_machinery_5965 .

TY  - CONF
AU  - Tanasković, Jovan
AU  - Mitrovic, Aleksandra
AU  - Franklin, Francis J.
AU  - Milković, Dragan
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5973
AB  - Safety of railway vehicles is one of the most importance steps in developing and design of them. Passive safety elements have a role to reduce consequences of collision to a minimal by absorbing collision kinetic energy. Applying a proper standard and adequate design of railway vehicle structure has a direct impact on safety of railway traffic. One of many ways for collision energy absorption is the tube energy absorber which works on the principle of shrinking the foam filled tube passing through special cone bushing. Fill made from high density polyurethane has a role to increase deformation resistance during elastic-plastic deformation of the tube. Seamless tube was made from low carbon steel while the cone bushing was made from quench and tempered carbon steel. This type of absorber is designed to install in a line (behind) with standard buffer. Using this type of absorber energy absorption occurs by elastic-plastic deformation of the tube, friction between the tube and cone bushing and pressing of the foam. With the aim to show influence of the density of the foam on absorption power, experimental investigations of tubes filled by polyurethane foam of different density were done. Results of experimental investigations show that increase of density gives higher deformation resistance as well as higher absorption power. Further investigations will be directed to improve of absorption characteristics by chose a most acceptable density of foam.
PB  - Innovation Center of Faculty of Mechanical Engineering
C3  - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2018, The book of Abstract
T1  - Impact of density of polyurethane foam on absorption power of energy absorber
EP  - 31
SP  - 31
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5973
ER  - 

@conference{
author = "Tanasković, Jovan and Mitrovic, Aleksandra and Franklin, Francis J. and Milković, Dragan",
year = "2018",
abstract = "Safety of railway vehicles is one of the most importance steps in developing and design of them. Passive safety elements have a role to reduce consequences of collision to a minimal by absorbing collision kinetic energy. Applying a proper standard and adequate design of railway vehicle structure has a direct impact on safety of railway traffic. One of many ways for collision energy absorption is the tube energy absorber which works on the principle of shrinking the foam filled tube passing through special cone bushing. Fill made from high density polyurethane has a role to increase deformation resistance during elastic-plastic deformation of the tube. Seamless tube was made from low carbon steel while the cone bushing was made from quench and tempered carbon steel. This type of absorber is designed to install in a line (behind) with standard buffer. Using this type of absorber energy absorption occurs by elastic-plastic deformation of the tube, friction between the tube and cone bushing and pressing of the foam. With the aim to show influence of the density of the foam on absorption power, experimental investigations of tubes filled by polyurethane foam of different density were done. Results of experimental investigations show that increase of density gives higher deformation resistance as well as higher absorption power. Further investigations will be directed to improve of absorption characteristics by chose a most acceptable density of foam.",
publisher = "Innovation Center of Faculty of Mechanical Engineering",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2018, The book of Abstract",
title = "Impact of density of polyurethane foam on absorption power of energy absorber",
pages = "31-31",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5973"
}

Tanasković, J., Mitrovic, A., Franklin, F. J.,& Milković, D.. (2018). Impact of density of polyurethane foam on absorption power of energy absorber. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2018, The book of Abstract
Innovation Center of Faculty of Mechanical Engineering., 31-31.
https://hdl.handle.net/21.15107/rcub_machinery_5973

Tanasković J, Mitrovic A, Franklin FJ, Milković D. Impact of density of polyurethane foam on absorption power of energy absorber. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2018, The book of Abstract. 2018;:31-31.
https://hdl.handle.net/21.15107/rcub_machinery_5973 .

Tanasković, Jovan, Mitrovic, Aleksandra, Franklin, Francis J., Milković, Dragan, "Impact of density of polyurethane foam on absorption power of energy absorber" in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2018, The book of Abstract (2018):31-31,
https://hdl.handle.net/21.15107/rcub_machinery_5973 .

TY  - JOUR
AU  - Vasić, Gordana
AU  - Franklin, Francis J.
AU  - Kapoor, Ajay
AU  - Lučanin, Vojkan
PY  - 2008
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/850
AB  - Low-adhesion (i.e., low-friction) problems continue to plague the modern railway, particularly in autumn when leaves on the line and damp conditions combine to form a low-adhesion contaminant film on the railhead. Sudden drops in adhesion can cause havoc with timetables, and can lead to accidents electrical insulation by contaminants can cause problems with track circuitry. Using laboratory twin-disk testing, a number of techniques for reproducing the leaf-film have been tried, and the adhesion behaviour of the resultant contaminant films is investigated. Misty conditions are found to be the best for producing low-adhesion leaf films.
PB  - Inderscience Enterprises Ltd, Geneva
T2  - International Journal of Surface Science and Engineering
T1  - Laboratory simulation of low-adhesion leaf film on rail steel
EP  - 97
IS  - 1-2
SP  - 84
VL  - 2
DO  - 10.1504/IJSURFSE.2008.018970
ER  - 

@article{
author = "Vasić, Gordana and Franklin, Francis J. and Kapoor, Ajay and Lučanin, Vojkan",
year = "2008",
abstract = "Low-adhesion (i.e., low-friction) problems continue to plague the modern railway, particularly in autumn when leaves on the line and damp conditions combine to form a low-adhesion contaminant film on the railhead. Sudden drops in adhesion can cause havoc with timetables, and can lead to accidents electrical insulation by contaminants can cause problems with track circuitry. Using laboratory twin-disk testing, a number of techniques for reproducing the leaf-film have been tried, and the adhesion behaviour of the resultant contaminant films is investigated. Misty conditions are found to be the best for producing low-adhesion leaf films.",
publisher = "Inderscience Enterprises Ltd, Geneva",
journal = "International Journal of Surface Science and Engineering",
title = "Laboratory simulation of low-adhesion leaf film on rail steel",
pages = "97-84",
number = "1-2",
volume = "2",
doi = "10.1504/IJSURFSE.2008.018970"
}

Vasić, G., Franklin, F. J., Kapoor, A.,& Lučanin, V.. (2008). Laboratory simulation of low-adhesion leaf film on rail steel. in International Journal of Surface Science and Engineering
Inderscience Enterprises Ltd, Geneva., 2(1-2), 84-97.
https://doi.org/10.1504/IJSURFSE.2008.018970

Vasić G, Franklin FJ, Kapoor A, Lučanin V. Laboratory simulation of low-adhesion leaf film on rail steel. in International Journal of Surface Science and Engineering. 2008;2(1-2):84-97.
doi:10.1504/IJSURFSE.2008.018970 .

Vasić, Gordana, Franklin, Francis J., Kapoor, Ajay, Lučanin, Vojkan, "Laboratory simulation of low-adhesion leaf film on rail steel" in International Journal of Surface Science and Engineering, 2, no. 1-2 (2008):84-97,
https://doi.org/10.1504/IJSURFSE.2008.018970 . .