Title:
Fracture Process Zone in Dynamically Loaded CLWL-DCB Concrete Specimens
Author(s):
Jung-Heum Yon, Neil M. Hawkins, and Albert S. Kobayashi
Publication:
Materials Journal
Volume:
88
Issue:
5
Appears on pages(s):
470-479
Keywords:
cantilever beams; cracking (fracturing); dynamic loads; energy; failure; fracture properties; strains; tests; Materials Research
DOI:
10.14359/2119
Date:
9/1/1991
Abstract:
Reports results of tests on crack-line wedge-loaded double-cantilever beam (CLWL-DCB) concrete specimens loaded to failure at increasing strain rates using a displacement-controlled MTS dynamic loading system. Linear elastic fracture mechanics (LEFM), together with a trailing fracture process zone (FPZ), was used to evaluate the dynamic fracture response of those specimens. While the constitutive relation governing the FPZ was found to be strain-rate independent, the dynamic stress intensity factor was found to be strain-rate dependent. The energy release rate closely approximated the energy dissipation rate in the FPZ, demonstrating that the FPZ is the dominant energy-dissipation mechanism in concrete.