Fracture prediction of rocks under mode I and mode II loading using the generalized maximum tangential strain criterion

By Mingdong Wei, Feng Dai, Nuwen Xu, Yi Liu, Tao Zhao. 2017

140 citations recorded by the source corpus.

Abstract The effects of specimen geometry on mode I and mode II fracture toughness (i.e., K Ic and K IIc ), and the ratio of K IIc to K Ic for a given rock material were derived on the basis of a generalized maximum tangential strain (GMTSN) fracture criterion, in which the effects of T-stress and radial stress on rock fracturing can be taken into consideration. To verify these theoretical predictions, laboratory tests using semi-circular bend (SCB) and center-cracked circular disc (CCCD) specimens were conducted. Experimental results indicate that the GMTSN criterion is capable of estimating the geometry dependence of K Ic and K IIc , the ratio of K IIc to K Ic and the fracture initiation angle of rocks. Moreover, the GMTSN criterion can provide better estimates for the experimental results than some other frequently-used fracture criteria. In addition, our study reveals that the SCB fracture test using asymmetric bottom supports can be identified as a suitable testing method to estimate the upper bound of mode II fracture resistance.

Subfields: Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/8e06cf0f1d89802aa24c9735a23916fe149039b2

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Mechanics of Materials

  1. Yi Liu
  2. Mingdong Wei
  3. Feng Dai
  4. Jing Luo
  5. Jia-wen Zhou
  6. Jian Zhao
  7. Qianbing Zhang

Citations in the corpus