scholarly journals Response of an impacting Hertzian contact to an order-2 subharmonic excitation : Theory and experiments

2006 ◽  
Vol 296 (1-2) ◽  
pp. 319-333 ◽  
Author(s):  
J. Perret-Liaudet ◽  
E. Rigaud
Keyword(s):  
Hertzian Contact ◽  
Subharmonic Excitation ◽  
Theory And Experiments

Superharmonic Resonance of Order 2 for an Impacting Hertzian Contact Oscillator: Theory and Experiments

2006 ◽  
Vol 2 (2) ◽  
pp. 190-196 ◽  
Author(s):  
Joël Perret-Liaudet ◽  
Emmanuel Rigaud
Keyword(s):  
Threshold Level ◽  
Wide Frequency Range ◽  
Hertzian Contact ◽  
Frequency Range ◽  
Test Rig ◽  
Response Curves ◽  
Superharmonic Resonance ◽  
Moving Body ◽  
Oscillator Theory ◽  
Theory And Experiments

The purpose of this paper is to investigate experimental responses of a preloaded vibroimpact Hertzian contact to an order 2 superharmonic excitation. A test rig is used, corresponding to a double sphere–plane contact preloaded by the weight of a moving body. Typical response curves are obtained under the superharmonic excitation. The Hertzian nonlinearity constitutes the precursor of vibroimpacts established over a wide frequency range. This behavior can be related to the existence of a transcritical bifurcation. In conjuction with the experiments, numerical results lead to the same conclusion. In particular, the threshold level of the excitation necessary to induce vibroimpact is confirmed.

Superharmonic Resonance of Order 2 for an Impacting Hertzian Contact Oscillator: Theory and Experiments

2005 ◽  
Author(s):  
Joe¨l Perret-Liaudet ◽  
Emmanuel Rigaud
Keyword(s):  
Threshold Level ◽  
Wide Frequency Range ◽  
Hertzian Contact ◽  
Frequency Range ◽  
Test Rig ◽  
Response Curves ◽  
Superharmonic Resonance ◽  
Moving Body ◽  
Oscillator Theory ◽  
Theory And Experiments

The purpose of this paper is to investigate experimental responses of a preloaded vibroimpact Hertzian contact to an order 2 superharmonic excitation. A test rig is used, corresponding to a double sphere-plane contact preloaded by the weight of a moving body. Typical response curves are obtained kinder the superharmonic excitation. The Hertzian non linearity constitutes the precursor of vibroimpacts established over a wide frequency range. This behaviour can be related to the existence of a transcritical bifurcation. In conjuction with the experiments, numerical results lead to the same conclusion. In particular, the threshold level of the excitation necessary to induce vibroimpact is confirmed.

Seismic Pounding Model Using Hertzian Contact

2018 ◽  
Author(s):  
Arthur Mereles ◽  
Marcus Varanis ◽  
José Manoel Balthazar ◽  
Angelo Marcelo Tusset
Keyword(s):  
Hertzian Contact ◽  
Seismic Pounding

scholarly journals Improved design criterion for frictionally engaged contacts in overrunning clutches

2021 ◽  
Author(s):  
Nadine Nagler ◽  
Armin Lohrengel
Keyword(s):  
Design Process ◽  
Contact Area ◽  
Axial Load ◽  
State Of The Art ◽  
Tangential Force ◽  
Design Criterion ◽  
Hertzian Contact ◽  
Loss Of Function ◽  
Axial Loads ◽  
Improved Design

AbstractOverrunning clutches, also known as freewheel clutches, are frictionally engaged, directional clutches; they transmit torque depending on the Freewheel clutch rings’ rotation directions. The torque causes a tangential force in the Hertzian contact area. The hitherto “state-of-the-art design criterion” bases on this load situation. In practice, axial loads additionally act on the frictionally engaged Hertzian contact area. This additional axial load can cause the loss of the friction connection and so the freewheel clutch slips. This publication presents an improved design criterion for frictionally engaged contacts in freewheel clutches. It allows to consider tangential as well as axial loads during the design process. Additionally, it offers the possibility to estimate the probability of frictional engagement loss and gross slip based on the freewheel clutch’s application scenario. This publication points out how to use the improved design criterion to design freewheel clutches that are more robust against a loss of function.

Sign in / Sign up

Export Citation Format

Share Document