Investigation of railroad ballast particle breakage
نویسندگان
چکیده
منابع مشابه
Discrete Element Modeling of Railroad Ballast Settlement
This paper presents findings of a railroad ballast Discrete Element Modeling (DEM) research study focused on investigating ballast settlement under repeated wheel loading. In this approach, the ballast layer is modeled as an assembly of aggregate particles, AREMA No. 24 ballast gradation with different shapes and angularities and rough surface textures. The study matrix considered three differe...
متن کاملParametric dependence of particle breakage mechanisms
It has been observed that the pattern of particle impact breakage in two-dimensional systems is a result of two mechanisms. AMechanism IB accounts for the breakage induced by the stresses that appear in unbroken particles. AMechanism IIB breakage is due to the buckling of the Mechanism I fragments. The purpose of this paper is to try and understand the parameters that govern the magnitude of th...
متن کاملComputer simulation of impact-induced particle breakage
The breakage induced in single circular particles that impact on solid plates has been studied using a two-dimensional simulation of solid fracture. The simulation allows the computer 'experimenter' to vary independently material properties such as Young's modulus, Poisson's ratio and work of fracture, flexibility that is unavailable in direct experimentation. Where comparison is possible, the ...
متن کاملDiscontinuous Deformation Analysis of Seismic Failure Behavior in a Narrow Area of Railroad Ballast
The seismic failure behavior of railroad ballasts in response to earthquakes was analyzed using Discontinuous Deformation Analysis.Several sinusoidal waves with different frequencies and accelerations were inputted into the discontinuous numerical model of a railroad ballast ,which consists of an assemblage of polygonal crushed stones,rails,sleepers and a roadbed .The dependencies of railroad f...
متن کاملDielectric Constant Measurement of Railroad Ballast and Application of STFT for GPR Data Analysis
Abstract Ballast fouling in railroad substructure is detrimental to railroad track effectiveness and its structural capacity. Ground penetrating radar (GPR) provides a rapid, effective and continuous approach to assess railroad substructure condition. However, unknown ballast dielectric constant and unclear interface between clean and fouled ballast limit the GPR assessment accuracy. In this st...
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ژورنال
عنوان ژورنال: Pollack Periodica
سال: 2019
ISSN: 1788-1994,1788-3911
DOI: 10.1556/606.2019.14.2.1