In this study, an ultrasonic nanocrystalline surface modification (UNSM) technique was applied to normal and heat-treated rails made of 60 kgK steel to enhance the wear resistance of the wheel-rail interaction. The hardness and compressive residual stress values of the untreated and UNSM-treated rails were measured by the Brinell hardness tester and X-ray diffraction technique, respectively. It...

Train wheel sets must be periodically inspected for possible or actual premature failures and it is very significant to record the wear history for the full life of utilization of wheel sets. This means that an online measuring system could be of great benefit to overall process control. An online non-contact method for measuring a wheel set's geometric parameters based on the opto-electronic m...

Wheel wear is a natural phenomenon of wheel–rail rolling contact during vehicle operation. The non-uniform in lateral and circumferential directions normally occurred on wheels. will lead to the unexpected hollow which can cause flange vibration at low-frequency band, result vertical originate from polygon phenomenon. These two forms are coupled each other wheels affect dynamic behaviours syste...

This work details research on the formation mechanism of wheel polygonalization in high-speed trains and its effect factors by numerical modeling order to prevent increasingly prevalent problem polygonal wear. The lateral self-excited vibration model a was developed using LuGre friction theory. properties crucial condition Hopf bifurcation were investigated; process wear simulated results valid...

Wear in rolling contact is a complex phenomenon because it multi-scale and multi-physical by nature involves many strongly correlated parameters. It makes the numerical calculation of wear very challenging. In order to simulate wear, better understanding influencing parameters involved importance. This work presents new railway wheel based on Archard's equation combined with spatial statistic a...

BACKGROUND There are numerous factors including physical, biomechanical, and individual that influence exposure to hand-transmitted vibration (HTV) and cause variability in the exposure measurements. Knowledge of exposure variability and determinants of exposure could be used to improve working conditions. We performed a quasi-experimental study, where operators performed routine work tasks in ...

The paper details the effects of depth of cut and vibration amplitude when ultrasonic assisted (US) creep feed grinding Inconel 718 with an open structured alumina based wheel. The workpiece was actuated at a constant frequency (~20.5kHz) via a block sonotrode attached to a 1kW piezoelectric transducer-generator system. A full factorial experimental array comprising 12 tests was conducted invol...

The paper details the effects of depth of cut and vibration amplitude when ultrasonic assisted (US) creep feed grinding Inconel 718 with an open structured alumina based wheel. The workpiece was actuated at a constant frequency (~20.5kHz) via a block sonotrode attached to a 1kW piezoelectric transducer-generator system. A full factorial experimental array comprising 12 tests was conducted invol...