Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
The Use of the Modified Hopkinson Bar for Determining Fracture Properties of Concrete
Year:2016
Research Areas
  • Engineering
Information
Abstract
An analysis of the spalling technique of concrete bars using the modified Hopkinson bar was carried out. A new experimental configuration is proposed adding some variations to previous works. An increased length for concrete specimens was chosen and finite- element analysis was used for designing a conic projectile to obtain a suitable triangular impulse wave. The aim of this initial work is to establish an experimental framework which allows a simple and direct analysis of concrete subjected to high strain rates. The efforts and configuration of these primary tests, as well as the selected geometry and dimensions for the different elements, have been focused to achieve a simple way of identifying the fracture position and so the tensile strength of tested specimens. This dynamic tensile strength can be easily compared with previous values published in literature giving an idea of the accuracy of the method and technique proposed and the possibility to extend it in a near future to obtain other mechanical properties such as the fracture energy. The tests were instrumented with strain gauges, accelerometers and high-speed camera in order to validate the results by different ways. Results of the dynamic tensile strength of the tested concrete are presented.
International
Si
Congress
DYMAT
960
Place
Grenoble (Francia)
Reviewers
Si
ISBN/ISSN
0000-0000
Start Date
19/10/2016
End Date
21/10/2016
From page
1
To page
13
The Use of the Modified Hopkinson Bar for Determining Fracture Properties of Concrete
Participants
  • Autor: Victor Rey de Pedraza Ruiz (UPM)
  • Autor: Francisco Galvez Diaz-Rubio (UPM)
  • Autor: David Angel Cendon Franco (UPM)
  • Autor: Vicente Sanchez Galvez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Materiales Estructurales Avanzados y Nanomateriales
  • Centro o Instituto I+D+i: CENTRO INVEST. MATERIALES ESTRUCTURALES (CIME)
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