Nonlinear fracture of concrete and ceramicsThe nonlinear fracture process zones in an impacted unnotched concrete bend specimen, a prenotched ceramic bend specimen, and an unnotched ceramic/ceramic composite bend specimen were estimated through hybrid experimental numerical analysis. Aggregate bridging in concrete, particulate bridging in ceramics, and fiber bridging in ceramic/ceramic composite are modeled by Barenblatt-type cohesive zones which are incorporated into the finite-element models of the bend specimens. Both generation and propagation analyses are used to estimate the distribution of crack closure stresses in the nonlinear fracture process zones. The finite-element models are then used to simulate fracture tests consisting of rapid crack propagation in an impacted concrete bend specimen, and stable crack growth and strain softening in a ceramic and ceramic/ceramic composite bend specimens.
Document ID
19890059940
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Kobayashi, Albert S. (Washington Univ. Seattle, WA, United States)
Du, Jia-Ji (Washington Univ. Seattle, WA, United States)
Hawkins, Niel M. (Washington Univ. Seattle, WA, United States)
Bradt, Richard C. (Washington, University Seattle, United States)