Tensile fracture strength of Brisbane tuff by static and cyclic loading tests

Erarslan, N., Alehossein, H. and Williams, D. J. (2013) Tensile fracture strength of Brisbane tuff by static and cyclic loading tests. Rock Mechanics and Rock Engineering, 47 4: 1135-1151. doi:10.1007/s00603-013-0469-5

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Author Erarslan, N.
Alehossein, H.
Williams, D. J.
Title Tensile fracture strength of Brisbane tuff by static and cyclic loading tests
Journal name Rock Mechanics and Rock Engineering   Check publisher's open access policy
ISSN 0723-2632
Publication date 2013-08-17
Year available 2013
Sub-type Article (original research)
DOI 10.1007/s00603-013-0469-5
Volume 47
Issue 4
Start page 1135
End page 1151
Total pages 17
Place of publication Vienna, Austria
Publisher Springer Wien
Language eng
Formatted abstract
This research presents the results of laboratory experiments during the investigation of tensile strength–strain characteristics of Brisbane tuff disc specimens under static and diametral cyclic loading. Three different cyclic loading methods were used; namely, sinusoidal cyclic loading, type I and II increasing cyclic loading with various amplitude values. The first method applied the stress amplitude−cycle number (s–n) curve approach to the measurement of the indirect tensile strength (ITS) and fracture toughness (KIC) values of rocks for the first time in the literature. The type I and II methods investigated the effect of increasing cyclic loading on the ITS and KIC of rocks. For Brisbane tuff, the reduction in ITS was found to be 30 % under sinusoidal loading, whereas type I and II increasing cyclic loading caused a maximum reduction in ITS of 36 %. The maximum reduction of the static KIC of 46 % was obtained for the highest amplitude type I cyclic loading tested. For sinusoidal cyclic loading, a maximum reduction of the static KIC of 30 % was obtained. A continuous irreversible accumulation of damage was observed in dynamic cyclic tests conducted at different amplitudes and mean stress levels. Scanning electron microscope images showed that fatigue damage in Brisbane tuff is strongly influenced by the failure of the matrix because of both inter-granular fracturing and trans-granular fracturing. The main characteristic was grain breakage under cyclic loading, which probably starts at points of contact between grains and is accompanied by the production of very small fragments, probably due to frictional sliding within the weak matrix.
Keyword Brazilian indirect tensile strength
Increasing cyclic loading
Rock fatigue
Rock fracture toughness
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online: 17 August 2013

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2014 Collection
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Citation counts: TR Web of Science Citation Count  Cited 0 times in Thomson Reuters Web of Science Article
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Created: Wed, 11 Sep 2013, 01:37:25 EST by Julie Hunter on behalf of School of Civil Engineering