Effect of loading rate on fracture behaviour of rock materials

Q. B. Zhang, Yangliang Zou

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

2 Citations (Scopus)

Abstract

In this paper, experiments are carried out to study the quasi-static and dynamic fracture behaviour of sedimentary, igneous and metamorphic rocks. The notched semi-circular bending method has been employed to determine fracture parameters over a wide range of loading rates using both a servo-hydraulic machine and a split Hopkinson pressure bar (SHPB). The time to fracture, crack speed and velocity of the moving specimen halves are measured by strain gauge, crack propagation gauge and high-speed photography on the macroscopic level. This study reveals clearly that: dynamic crack initiation and growth toughness increase with the increase of loading rate and crack speed; the kinetic energy of the moving specimen halves increases with increasing impact speed of the striker; and dynamic fracture energy and increases rapidly with increasing crack speed.

Original languageEnglish
Title of host publicationRock Engineering and Rock Mechanics: Structures in and on Rock Masses - Proceedings of EUROCK 2014, ISRM European Regional Symposium
PublisherTaylor & Francis
Pages119-124
Number of pages6
Publication statusPublished - 2014
Externally publishedYes
EventEuropean Rock Mechanics Symposium 2014 - Vigo, Spain
Duration: 26 May 201428 May 2014

Conference

ConferenceEuropean Rock Mechanics Symposium 2014
Abbreviated titleEUROCK 2014
CountrySpain
CityVigo
Period26/05/1428/05/14

Cite this

Zhang, Q. B., & Zou, Y. (2014). Effect of loading rate on fracture behaviour of rock materials. In Rock Engineering and Rock Mechanics: Structures in and on Rock Masses - Proceedings of EUROCK 2014, ISRM European Regional Symposium (pp. 119-124). Taylor & Francis.