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Experimental study of metal cushion pads for high speed railways.

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Title: Experimental study of metal cushion pads for high speed railways.
Authors: Carrascal, Isidro A.1, Pérez, Alejandro2, Casado, José A.1, Diego, Soraya1, Polanco, Juan A.1, Ferreño, Diego1 ferrenod@unican.es, Martín, Juan J.2
Source: Construction & Building Materials. Sep2018, Vol. 182, p273-283. 11p.
Subjects: Cushioning materials, High speed trains, Mechanical shock, Vibration (Mechanics), Railroad ties, Stiffness (Mechanics), Electric resistance, Corrosion resistance
Abstract: The widespread use of railway concrete sleepers/slab track has led to the evolution of fastening systems towards the use of elastic rail pads. Pads are interposed between the rail and the sleeper as damping elements to minimize the transmission of shocks and vibrations to the sleeper, this function being of particular importance for high-speed railways. Polymeric materials have been extensively used to manufacture resilient rail pads. Plastics, however, suffer from a series of intrinsic limitations since the environmental agents (UV rays, temperature, air humidity, etc.) as well as the compressive fatigue loads they are subjected to, negatively affect their mechanical properties over time. This study proposes the use of a novel solution, the so-called ‘metal cushion’ pads, as a reliable alternative to polymer pads. Metal cushion pads are made of stainless steel wire, knitted, embossed and cold-pressed down into a mold to achieve the required shape and size. The thorough experimental scope carried out in this research includes the following tests: (i) static and dynamic stiffness, (ii) fatigue aging, (iii) electrical resistance and, (iv) corrosion resistance. The values of static and dynamic stiffness are very similar to those obtained with other traditional polymers such as EVA and TPE-M. In addition, it has been found that the stiffness of the metallic solution can be modified by changing the diameter and density of the wire. In the case of fatigue aging, the foremost wearing suffered by the metal cushion pads occurs mainly in the early cycling stages, although the total damage is comparable to that of the traditional solutions. The electrical resistance of the metal cushion does not fulfill the requirements demanded by the international standards; however, its behavior is satisfactory if the metallic solution is combined with a thin plastic sheet. Finally, the metal samples have passed the corrosion test in a saline environment without showing any signs of corrosion damage. [ABSTRACT FROM AUTHOR]
Copyright of Construction & Building Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Experimental study of metal cushion pads for high speed railways.
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  Data: <searchLink fieldCode="AR" term="%22Carrascal%2C+Isidro+A%2E%22">Carrascal, Isidro A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Pérez%2C+Alejandro%22">Pérez, Alejandro</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Casado%2C+José+A%2E%22">Casado, José A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Diego%2C+Soraya%22">Diego, Soraya</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Polanco%2C+Juan+A%2E%22">Polanco, Juan A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ferreño%2C+Diego%22">Ferreño, Diego</searchLink><relatesTo>1</relatesTo><i> ferrenod@unican.es</i><br /><searchLink fieldCode="AR" term="%22Martín%2C+Juan+J%2E%22">Martín, Juan J.</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Construction+%26+Building+Materials%22">Construction & Building Materials</searchLink>. Sep2018, Vol. 182, p273-283. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Cushioning+materials%22">Cushioning materials</searchLink><br /><searchLink fieldCode="DE" term="%22High+speed+trains%22">High speed trains</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+shock%22">Mechanical shock</searchLink><br /><searchLink fieldCode="DE" term="%22Vibration+%28Mechanics%29%22">Vibration (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Railroad+ties%22">Railroad ties</searchLink><br /><searchLink fieldCode="DE" term="%22Stiffness+%28Mechanics%29%22">Stiffness (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+resistance%22">Electric resistance</searchLink><br /><searchLink fieldCode="DE" term="%22Corrosion+resistance%22">Corrosion resistance</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The widespread use of railway concrete sleepers/slab track has led to the evolution of fastening systems towards the use of elastic rail pads. Pads are interposed between the rail and the sleeper as damping elements to minimize the transmission of shocks and vibrations to the sleeper, this function being of particular importance for high-speed railways. Polymeric materials have been extensively used to manufacture resilient rail pads. Plastics, however, suffer from a series of intrinsic limitations since the environmental agents (UV rays, temperature, air humidity, etc.) as well as the compressive fatigue loads they are subjected to, negatively affect their mechanical properties over time. This study proposes the use of a novel solution, the so-called ‘metal cushion’ pads, as a reliable alternative to polymer pads. Metal cushion pads are made of stainless steel wire, knitted, embossed and cold-pressed down into a mold to achieve the required shape and size. The thorough experimental scope carried out in this research includes the following tests: (i) static and dynamic stiffness, (ii) fatigue aging, (iii) electrical resistance and, (iv) corrosion resistance. The values of static and dynamic stiffness are very similar to those obtained with other traditional polymers such as EVA and TPE-M. In addition, it has been found that the stiffness of the metallic solution can be modified by changing the diameter and density of the wire. In the case of fatigue aging, the foremost wearing suffered by the metal cushion pads occurs mainly in the early cycling stages, although the total damage is comparable to that of the traditional solutions. The electrical resistance of the metal cushion does not fulfill the requirements demanded by the international standards; however, its behavior is satisfactory if the metallic solution is combined with a thin plastic sheet. Finally, the metal samples have passed the corrosion test in a saline environment without showing any signs of corrosion damage. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Construction & Building Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1016/j.conbuildmat.2018.06.134
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 11
        StartPage: 273
    Subjects:
      – SubjectFull: Cushioning materials
        Type: general
      – SubjectFull: High speed trains
        Type: general
      – SubjectFull: Mechanical shock
        Type: general
      – SubjectFull: Vibration (Mechanics)
        Type: general
      – SubjectFull: Railroad ties
        Type: general
      – SubjectFull: Stiffness (Mechanics)
        Type: general
      – SubjectFull: Electric resistance
        Type: general
      – SubjectFull: Corrosion resistance
        Type: general
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      – TitleFull: Experimental study of metal cushion pads for high speed railways.
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              M: 09
              Text: Sep2018
              Type: published
              Y: 2018
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