Mechanical behaviour of strain-hardening cement-based composites (shccunder low and high tensile strain rates)

Flávio De Andrade Silva, Marko Butler, Viktor Mechtcherine, Deju Zhu, Barzin Mobasher

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

In this research project the behaviour of strain-hardening, cement-based composites (SHCC subjected to low and high strain rates was studied. Uniaxial tension tests on dumbbellshaped SHCC specimens were performed at rates ranging from 0.00001s-1 to 50s-1. For the tests performed at strain rates of 0.01s-1 and below, SHCC yielded a moderate increase in tensile strength and simultaneous decrease in strain capacity with increasing strain rate. When tested for higher strain rates from 10 to 50s-1 a considerable increase in tensile strain and strain capacity was measured. Microscopic investigation of the fracture surfaces provided some insight into the specific mechanisms of SHCC failure under high rates of loading. In contrast to rapid quasi-static testing (=0.001s-1 where an average fibre pullout length of 0.3mm was observed, almost no fibre failure and an average pullout length of approximately 2.5mm were found in the high strain rate tests (25s-1. Furthermore, the fibres on the fracture surfaces produced in the high rate tests exhibited pronounced plastic deformations.

Original languageEnglish (US)
Title of host publication18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale
StatePublished - 2010
Event18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF 2010 - Dresden, Germany
Duration: Aug 30 2010Sep 3 2010

Other

Other18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF 2010
CountryGermany
CityDresden
Period8/30/109/3/10

Keywords

  • Fibre pullout tests
  • High strain rate
  • PVA fibre
  • SHCC
  • Uniaxial tension tests

ASJC Scopus subject areas

  • Mechanics of Materials

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    De Andrade Silva, F., Butler, M., Mechtcherine, V., Zhu, D., & Mobasher, B. (2010). Mechanical behaviour of strain-hardening cement-based composites (shccunder low and high tensile strain rates). In 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale