Validation of microcrack models by experiments on real and replicated rocks

Kam Tim Chau, Robina H C Wong, P. Wang

Research output: Journal article publicationConference articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

This paper presents a systematic approach to validate microcrack models by experiments. Although only experiments on rocks were done, similar approach should be applicable to concrete, ceramic, or other brittle materials. A brief review of microcrack models will be presented. Microscopic observations and ultrasonic wave measurements were done on natural and replicated rocks. The results from microscopic studies provide the necessary information to quantify the amount or degree of microcracking, in terms of a parameter called `crack density'; while the change of ultrasonic wave speeds was used to interpret the degree of microcracking. In particular, preliminary results on replicated rocks suggests that both `self-consistent method' and `non-interacting method' give reliable prediction if the crack density is less than 0.21; similar results on natural rocks also seems to suggest that both theories are good only for crack density up to 0.2. Nevertheless, more refinement of the testing technique is still required.
Original languageEnglish
Pages (from-to)133-146
Number of pages14
JournalAmerican Society of Mechanical Engineers, Applied Mechanics Division, AMD
Volume201
Publication statusPublished - 1 Dec 1995
EventProceedings of the 1995 Joint ASME Applied Mechanics and Materials Summer Meeting - Los Angeles, CA, United States
Duration: 28 Jun 199530 Jun 1995

ASJC Scopus subject areas

  • Mechanical Engineering

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