Application of an average strain energy density criterion to obtain the mixed mode fracture load of granite rock tested with the cracked asymmetric four-point bend specimens

By Seyed Mohammad Javad Razavi, M. Aliha, Filippo Berto. Theoretical and applied fracture mechanics (Print), 2017

190 citations recorded by the source corpus.

Abstract Mixed mode brittle fracture behaviour of granite rock is studied experimentally and theoretically using Asymmetric Four Point Bend (AFPB) specimens containing pre-cracks subjected to different mixed mode loading conditions, ranging from pure mode I to pure mode II. The main aim of this paper is twofold. First, to present a complete set of experimental results on fracture of pre-cracked granite samples under various in-plane loading mixities, and second, to predict the fracture loads of the tested rock samples under mixed mode I/II conditions using an energy-based criterion, namely the Average Strain Energy Density (ASED) criterion. Good agreement is found between the experimentally obtained fracture loads and the theoretical predictions based on the constancy of the mean strain energy density over the material volume. It is shown that the ASED criterion is able to provide well predictions for the fracture loads of the investigated rock material containing a pre-crack.

Subfields: Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/fb37d4395d13913bfda894ecca37298fa80b48ea

Citations in the corpus

• A Further Improved Maximum Tangential Stress Criterion for Assessing Mode I Fracture of Rocks Considering Non-singular Stress Terms of the Williams Expansion (2018, unknown): “To explain the geometry dependence, the size dependence and the loading configuration dependence of KIc, some theories have been proposed (Bazant and Kazemi 1990; Hu and Duan 2008; Ayatollahi and Akbardoost 2014; Berto et al. 2016; Cornetti et al. 2006; Razavi et al. 2017).”