the constitutive relationships of the rubber materials that act as the main spring of a hydraulic engine mount are nonlinear. in addition to material induced nonlinearity, further nonlinearities may be introduced by mount geometry, turbulent fluid behavior, temperature, boundary conditions, decoupler action, and hysteretic behavior. in this research all influence the behavior of the system only...

The practice of construction and operation railroads in the Arctic zone shows that greatest share track deformations occurs summer period during transition soils subgrade from frozen state to thawed state. Wetting, freezing-thawing, vibrodynamic effects trains have influence on properties clay composing railroad bed. A model a sub-tie base stabilized by geosynthetic materials is given. material...

Abstract The fusion welding process of metallic components, such as using gas tungsten arc (GTAW), is often accompanied by detrimental deformations and residual stresses, which affect the strength functionality these components. In this work, a phase-field model, usually used to track states phase-change materials, embedded in thermo-elastoplastic finite element model simulate GTAW estimate str...

this paper deals with the threshold radius that warrants the use of single restraining rail for transit and railroads. different railways use different threshold radius from 91m to 365m to provide restraining rail. these threshold figures are probably experience driven choices. the need for restraining rail may be related to a so-called derailment alarm coefficient of 1.2 sustained over 2m leng...

The paper develops a new methodolog y of FE modelling and simulation of the bridge – track – moving train system with the use of CAE systems. The KNI 140070 viaduct of span length 14.40 m, located on the Polish Central Main Line, has been selected. The modernized track contains: 60E1 main rails equipped with Vossloh 300-1 fasteners, 60E1 side rails with SB3 fas teners, B 320 U60 sleepers, crush...

One of the most important challenges in the development of urban railways network is the effects of railway vibrations on human and adjacent structures. Although various investigations into the sources of railway vibrations have been conducted, very few research works have been reported on the influences of track geometry parameters on the level of vibrations. This is addressed in this resea...