loading page

Anisotropic dynamic fracture and energy dissipation characteristics of interbedded marble subjected to multi-level uniaxial compressive cyclic loading
  • +1
  • yu wang,
  • jianqiang han,
  • junyu ren,
  • changhong li
yu wang
University of Science and Technology Beijing
Author Profile
jianqiang han
Institute of Acoustics Chinese Academy of Sciences
Author Profile
junyu ren
University of Science and Technology Beijing
Author Profile
changhong li
Author Profile

Peer review status:IN REVISION

26 Apr 2020Submitted to Fatigue & Fracture of Engineering Materials & Structures
27 Apr 2020Assigned to Editor
27 Apr 2020Submission Checks Completed
02 May 2020Reviewer(s) Assigned
02 Jul 2020Review(s) Completed, Editorial Evaluation Pending
06 Jul 2020Editorial Decision: Revise Major

Abstract

This work aims to investigate the anisotropic fracture and energy dissipation characteristics of marbles cored along an angle of 0°, 30°, 60° and 90° with respect to interbed planes, subjected to multi-level cyclic loading conditions. Rock fatigue deformation, strength, lifetime and dissipated energy first decreases and then increases with increasing interbed orientation, they get to the minimum for sample having 30° interbed orientation. Rock stiffness degradation is significant with the increase of cyclic level and the stiffness evolution is affected by interbed structure. The incremental rate of dissipated energy becomes faster with increase of cyclic loading level and it presents an abrupt increasing trend at the last cyclic loading level. A damage evolution model was first established based on the dissipated energy to describe the two-phase damage accumulation characteristics. It suggests that the proposed model fits well to the testing data and favorably represents the non-linear characteristics of damage accumulation.