View in EDS HTML Full Text PDF Full Text

Characteristics of energy storage and dissipation of coal under one‐time cyclic load.

Saved in:
Bibliographic Details
Title: Characteristics of energy storage and dissipation of coal under one‐time cyclic load.
Authors: Peng, Kang1 (AUTHOR) pengkang@cqu.edu.cn, Shi, Shaowei1 (AUTHOR), Zou, Quanle1 (AUTHOR) quanlezou2016@cqu.edu.cn, Mou, Junhui1 (AUTHOR), Yu, Jin2 (AUTHOR), Zhang, Yongjiang3 (AUTHOR), Cheng, Yanying4,5 (AUTHOR)
Source: Energy Science & Engineering. Sep2020, Vol. 8 Issue 9, p3117-3135. 19p.
Subject Terms: *Cyclic loads, *Energy storage, *Energy density, *Coal, *Axial loads, *Energy dissipation
Abstract: Energy is an important research parameter in rock mechanics. To explore the law of energy evolution of coal, a one‐time loading and unloading test under uniaxial compression was conducted on coal taken from four different coal mines. By utilizing the area integral method, the total input, elastic, and dissipated energy densities in coal at different unloading levels were calculated. The correlation between various energy densities and the evolution law of energy density with different unloading levels was attained. The peak strengths of the coal slowly declined with an increasing unloading level, which conforms to the relation of a linearly decreasing function. The energy dissipation rate has nonlinear characteristics, and the shape of the dissipation rate fitting curve changed from an upper concave to a downward concave with increasing strength. In all the coal samples, the energy density grew nonlinearly with the unloading level. Moreover, the growth rate of the total energy density was the highest, followed by the growth rates of the elastic and dissipated energy densities. All ratios of the elastic and dissipated energy densities to the total input energy density and the ratio of the dissipated energy density to the elastic energy density were constant. As the strength increased, the input energy and the elastic energy density increased at a faster rate, and they observed the same law. There is an insignificant relationship between the degree of destruction of the coal and the level of unloading. Energy is a major factor that drives the failure of a test piece, but this is not the main factor that determines the degree of damage to the test piece. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: enr
DbLabel: Energy & Power Source
An: 145429907
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Characteristics of energy storage and dissipation of coal under one‐time cyclic load.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Peng%2C+Kang%22">Peng, Kang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> pengkang@cqu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Shi%2C+Shaowei%22">Shi, Shaowei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zou%2C+Quanle%22">Zou, Quanle</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> quanlezou2016@cqu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Mou%2C+Junhui%22">Mou, Junhui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yu%2C+Jin%22">Yu, Jin</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Yongjiang%22">Zhang, Yongjiang</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cheng%2C+Yanying%22">Cheng, Yanying</searchLink><relatesTo>4,5</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Energy+Science+%26+Engineering%22">Energy Science & Engineering</searchLink>. Sep2020, Vol. 8 Issue 9, p3117-3135. 19p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Cyclic+loads%22">Cyclic loads</searchLink><br />*<searchLink fieldCode="DE" term="%22Energy+storage%22">Energy storage</searchLink><br />*<searchLink fieldCode="DE" term="%22Energy+density%22">Energy density</searchLink><br />*<searchLink fieldCode="DE" term="%22Coal%22">Coal</searchLink><br />*<searchLink fieldCode="DE" term="%22Axial+loads%22">Axial loads</searchLink><br />*<searchLink fieldCode="DE" term="%22Energy+dissipation%22">Energy dissipation</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Energy is an important research parameter in rock mechanics. To explore the law of energy evolution of coal, a one‐time loading and unloading test under uniaxial compression was conducted on coal taken from four different coal mines. By utilizing the area integral method, the total input, elastic, and dissipated energy densities in coal at different unloading levels were calculated. The correlation between various energy densities and the evolution law of energy density with different unloading levels was attained. The peak strengths of the coal slowly declined with an increasing unloading level, which conforms to the relation of a linearly decreasing function. The energy dissipation rate has nonlinear characteristics, and the shape of the dissipation rate fitting curve changed from an upper concave to a downward concave with increasing strength. In all the coal samples, the energy density grew nonlinearly with the unloading level. Moreover, the growth rate of the total energy density was the highest, followed by the growth rates of the elastic and dissipated energy densities. All ratios of the elastic and dissipated energy densities to the total input energy density and the ratio of the dissipated energy density to the elastic energy density were constant. As the strength increased, the input energy and the elastic energy density increased at a faster rate, and they observed the same law. There is an insignificant relationship between the degree of destruction of the coal and the level of unloading. Energy is a major factor that drives the failure of a test piece, but this is not the main factor that determines the degree of damage to the test piece. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=145429907
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1002/ese3.738
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 19
        StartPage: 3117
    Subjects:
      – SubjectFull: Cyclic loads
        Type: general
      – SubjectFull: Energy storage
        Type: general
      – SubjectFull: Energy density
        Type: general
      – SubjectFull: Coal
        Type: general
      – SubjectFull: Axial loads
        Type: general
      – SubjectFull: Energy dissipation
        Type: general
    Titles:
      – TitleFull: Characteristics of energy storage and dissipation of coal under one‐time cyclic load.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Peng, Kang
      – PersonEntity:
          Name:
            NameFull: Shi, Shaowei
      – PersonEntity:
          Name:
            NameFull: Zou, Quanle
      – PersonEntity:
          Name:
            NameFull: Mou, Junhui
      – PersonEntity:
          Name:
            NameFull: Yu, Jin
      – PersonEntity:
          Name:
            NameFull: Zhang, Yongjiang
      – PersonEntity:
          Name:
            NameFull: Cheng, Yanying
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 09
              Text: Sep2020
              Type: published
              Y: 2020
          Identifiers:
            – Type: issn-print
              Value: 20500505
          Numbering:
            – Type: volume
              Value: 8
            – Type: issue
              Value: 9
          Titles:
            – TitleFull: Energy Science & Engineering
              Type: main
ResultId 1