2014-5-14Rolling contact fatigue has been a critical problem on UK railways This paper describes recent developments in the modelling of cracks in rails which incorporates in the model the contact between the crack faces during calculation of the Stress Intensity Factors (SIFs) This data is then combined with the SIFs caused by contact loading to 2017-12-27MODELLING WRINKLING ONSET IN TEXTILE FORMING USING MEMBRANE ELEMENTS blank is modelled using membrane elements The friction coefficient between reinforcement and tools was set to 0 23 and the friction coefficient was 0 36 for contact between two layers of reinforcement 21st International Conference on Composite Materials

Modelling rolling contact phenomena in a pouch belt

2006-5-31Fig 2 shows how the contact surface between the belt and drive wheels and support rollers is modelled A curved viscoelastic surface with radius R 2 is indented by a rigid cylinder with radius R 1 representing either a roll or drive wheel The rubber surface passes underneath the rolling cylinder with speed v b The cylinder is considered rigid because compared to rubber the steel or

The modelling results also highlight that much higher contact forces and accelerations are generated on the exit of the rolling elements out of defect compared to when they strike the defective surface In-depth analyses of the numerically estimated dynamic contact forces between the rolling elements and the raceways of a bearing which are

2016-9-21The discrete element method (DEM) is an intuitive method in which discrete particles collide with each other and with other surfaces during an explicit dynamic simulation Typically each DEM particle represents a separate grain tablet shot peen etc DEM is not applicable to situations in which individual particles undergo complex deformation

Contact forces acting between rolling-elements and raceways can be obtained by the following expressions F inn = F out = K e 3=2 i (5) Element loads obtained from equations 5 are based on an assumption that contact angle between rolling-elements and raceways remain una ected by bearing rotational velocity

2014-5-14Rolling contact fatigue has been a critical problem on UK railways This paper describes recent developments in the modelling of cracks in rails which incorporates in the model the contact between the crack faces during calculation of the Stress Intensity Factors (SIFs) This data is then combined with the SIFs caused by contact loading to

Rolling element bearings: Construction and operation

2020-7-14Rolling element bearing dynamic behavior which is nonlinear is an important factor in the operation reliability and vibration response of turbomachinery These bearings often manifest unexpected patterns that are extremely sensitive to initial parameters and conditions (Photo: General Bearing Corporation) The rolling element bearing is a complex multi-body mechanical system with rolling

The size of the contact area between the ring and the rolls reflects the size of the deformation zone The bigger is the contact area the bigger is the deformation zone and vice versa So we can conclude from Fig 14 that the deformation zone in the radial pass is bigger than that in

2019-8-28Fatigue in martensitic 100Cr6: Relationship between rolling contact fatigue microstructural transitions and repetitive push testing Jee-Hyun Kanga Pedro E J Rivera-D az-del-Castilloa aQIBR University Technology Centre Department of Materials Science and Metallurgy University of Cambridge 27 Charles Babbage Road Cambridge CB3 0FS

2018-8-29sliding contact The modelling and simulation of such case would allow a better understanding of the contact pressure distribution wear and geometry evolution of the block as it wears out during a test Initially the introduction and motivation for this work is presented followed by a presentation of relevant scientific topics related to

2018-6-13The interaction between deformable tire and pavement was studied using the validated finite element model the full understanding of tire–pavement contact has implications for pavement damage prediction and pavement life-cycle assessment (fuel consumption estimation)

2019-9-12Hertz contact deformation and elastohydrodynamic fluid film were included Nevertheless the bearing friction torque was obtained by the empirical for-mulas in this model Nakhaeinejad et al 43 also devel-oped a dynamic model of rolling element bearings with defects using bond graphs In Nakhaeinejad's model the interaction between bearing

In slewing bearings a great number of contact pairs are present on the contact surfaces between the rolling elements and raceways of the bearing Computations to determine the load of the individual rolling elements taking into account the flexibility of the bearing ring are most often carried out using the finite element method

2019-7-23outer race inner race and the rolling elements have been modeled as small notches The contact between all the mating surfaces is considered as surface contact A Contact and Friction Force Modelling The model in consideration (Fig 2) has outer race inner race and rolling elements whose positions are defined in an inertial reference frame

Tire–pavement interaction modelling: hyperelastic tire

2018-6-13The interaction between deformable tire and pavement was studied using the validated finite element model the full understanding of tire–pavement contact has implications for pavement damage prediction and pavement life-cycle assessment (fuel consumption estimation)

Rolling elements play a central role in almost all modern engineering systems characterised by large relative motion between its mechanical components Multibody dynamics being the best-suited discipline to deal with the computational dynamic aspects of the analysis and modelling of systems with very large motion requires computationally

2018-12-12concerns the ball bearings in which cooperation between the rolling parts and the raceways has a contact point for the ball bearings and the contact line for the roll-ing bearings From the point of view of the endurance modeling of the anti-friction bearing the

A rolling element has a finite life The bearing will fail due to fatigue caused by the high cyclic stresses between the rolling elements and raceways even if operated under ideal design conditions As the failure of components in the axle bearing is one of the most significant factor in the safety incidents

2010-3-5Abstract：In this paper a three-dimensional finite element modelling of the ribbed strip rolling is carried out coupling the use of an extremely thin array of elements that is equivalent to the calculation of the additional shear deformation work rate occurred by the velocity discontinuity in the roll bite

2012-2-28noded hex elements as shown in Fig ure 2 Contact between Rail and Wheel is modelled using ANSYS Contact 173 elements placed on wheel and rail Finite element model mesh (Wheel and Rail) is obtained having a total of 35740 elements and 22830 nodes In this research 10 ton per wheel is applied approximately Wheels are assumed to operate on

2011-1-12Adams modelling of contact forces between disc cutter and mount rolling force from the LCM test while the simulation generated a higher rolling force 5 2 Modelling the tunnel face 21 5 3 Elements 23 5 3 1 Lower element 24 5 3 2 Upper element 25