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Dynamic Compressive Properties of Heat-Treated and Pre-Stressed Cement Mortar Specimen Subjected to Cyclic Impact Loading
Case Studies in Thermal Engineering
  • Ronghua Shu
  • Guang Xu, Missouri University of Science and Technology
  • Lijinhong Huang
Abstract

By carrying out the cyclic dynamic compressive experiment, the dynamic compressive properties of heat-treated and pre-stressed cement mortar subjected to cyclic impact loading were obtained. The results show that under static and cyclic impact loading, the peak stress shows a nonlinear decrease trend with the increasing dynamic impact number, and the failure strength decreases as heated temperature increases. The strain rate shows a linear increase trend as impact number increases. The relationship among the strain rate, temperature and impact number obey exponential relations, which could be expressed as ε˙ = 0.64E0.00854T+4.93 X 10−3tn+0.77N+18.70. The strain rate increase factor could be calculated by temperature by ω = 1.04+3.37 X 10−2e0.00849T. The impact number almost decreases linearly with the increasing temperature. The peak strain exhibits an increasing trend with an increase in impact number and temperature. The specimens are destroyed at a damage value of around 0.68 To 0.74. When the heated temperature increases, the failure size of pieces of specimen decreases accordingly. The fragmentation rate follows exponential function with temperature, which could be calculated by η = 0.325 + 5.55 X 10−5e0.0314T. The total reflected energy increases, and total transmitted energy, absorbed energy and accumulated absorbed energy per volume decrease as temperature and impact number increase.

Department(s)
Mining Engineering
Publication Status
Open Access
Comments

Jiangxi University of Science and Technology, Grant 205200100551

Keywords and Phrases
  • Cement mortar,
  • Cyclic impact loading,
  • Dynamic properties,
  • Energy dissipation,
  • High-temperature
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2024 Elsevier, All rights reserved.
Creative Commons Licensing
Creative Commons Attribution 4.0
Publication Date
5-1-2024
Publication Date
01 May 2024
Disciplines
Citation Information
Ronghua Shu, Guang Xu and Lijinhong Huang. "Dynamic Compressive Properties of Heat-Treated and Pre-Stressed Cement Mortar Specimen Subjected to Cyclic Impact Loading" Case Studies in Thermal Engineering Vol. 57 (2024) ISSN: 2214-157X
Available at: http://works.bepress.com/guang-xu/93/