Publication detail

Laboratory investigation on the particle-size effects in railway sanding: Comparisons between standard sand and its micro fragments

SHI, L.B. WANG, C. DING, H.H. KVARDA, D. GALAS, R. OMASTA, M. WANG, W.J. LIU, Q.Y. HARTL, M.

Czech title

Laboratorní výzkum vlivu velikosti částic při pískování: porovnání standardního písku a jeho micro fragmentů

English title

Laboratory investigation on the particle-size effects in railway sanding: Comparisons between standard sand and its micro fragments

Type

journal article in Web of Science

Language

en

Original abstract

In the railway sanding, the sand particles are firstly crushed into finer fragments in the inlet zone of wheel/rail contact. Therefore, two kinds of particles act in the sanding process: the initial sand with large sizes and the final fragments with micro sizes. To learn which kind of particles is more crucial for the sanding performances, standard sand particles (0.6–2.0 mm) and its micro fragments (0.1–30 μm) were used as two types of adhesion enhancers. The results indicated that the application of micro fragments had advantages on reducing the wear and surface damage, without losing adhesion enhancing capacities compared to the standard sand particles. However, the “fluid-driven” rolling contact fatigue (RCF) damage occurred when the micro fragments were used.

Czech abstract

Při pískovacím procesu dochází nejdříve k rozdrcení částic písku na malé fragmenty. Z tohoto důvodu můžeme u pískování rozlišit dva typy částic: velké počáteční částice a malé micro fragmenty. Cílem této studie bylo porovnat tyto dva typy částic z hlediska schopnosti obnovy adheze. S ohledem na tento cíl byl v této studii použit standardního písek (částice o velikosti 0,6-2,0 mm) a jeho micro fragmenty (částice o velikosti 0.1-30 μm). Výsledky ukazují, že micro fragmenty jsou schopny poskytovat stejnou obnovu adheze jako standardní písek, a současně jsou schopny redukovat opotřebení a míru poškození povrchu. Nicméně micro fragmenty (aplikované v podobě vodní suspenze) vedly ke kontaktní únavě.

English abstract

In the railway sanding, the sand particles are firstly crushed into finer fragments in the inlet zone of wheel/rail contact. Therefore, two kinds of particles act in the sanding process: the initial sand with large sizes and the final fragments with micro sizes. To learn which kind of particles is more crucial for the sanding performances, standard sand particles (0.6–2.0 mm) and its micro fragments (0.1–30 μm) were used as two types of adhesion enhancers. The results indicated that the application of micro fragments had advantages on reducing the wear and surface damage, without losing adhesion enhancing capacities compared to the standard sand particles. However, the “fluid-driven” rolling contact fatigue (RCF) damage occurred when the micro fragments were used.

Keywords in Czech

Pískování, adheze v kontaktu kola a kolejnice, opotřebení a poškození, fragmenty písku

Keywords in English

Railway sanding, Wheel/rail adhesion, Wear and damage, Sand fragments

Released

01.06.2020

Publisher

Elsevier

Location

Nizozemsko

ISSN

0301-679X

Volume

146

Number

6

Pages from–to

106259–106259

Pages count

12

BIBTEX


@article{BUT162105,
  author="Daniel {Kvarda} and Radovan {Galas} and Milan {Omasta} and Martin {Hartl},
  title="Laboratory investigation on the particle-size effects in railway sanding: Comparisons between standard sand and its micro fragments",
  year="2020",
  volume="146",
  number="6",
  month="June",
  pages="106259--106259",
  publisher="Elsevier",
  address="Nizozemsko",
  issn="0301-679X"
}