publication . Conference object . 2016

investigation on fracture mechanisms and crack propagation process of natural rock concrete interface

Wei Dong; Na Wang; Zhimin Wu; Bohan Xu;
Open Access
  • Published: 29 May 2016
  • Publisher: IA-FraMCoS
Abstract
The tests of uniaxial tension and three-point bending are carried out on rock-concrete composite specimens with natural interfaces to investigate the interface mechanics and fracture process so that to establish interface tension-softening constitutive law between concrete and rock. Tensile strength, fracture energy and initial fracture toughness of rock-concrete interface are investigated qualitatively. Based on the load-displacement curves measured in three-point bending test, the energy dissipation at rock-concrete interface is derived using the modified J-integral method. Further, through enforcing balance between energy dissipation and energy caused by fict...
Subjects
free text keywords: Dissipation, Constitutive equation, Fracture mechanics, Ultimate tensile strength, Crack closure, Cohesion (chemistry), Materials science, Fracture toughness, Bending, Mechanics
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