Local instability in fracture of granite and observation of crack growth by means of ink penetration test

H. Abe, M. Saka, K. Kanbe

Research output: Contribution to conferencePaperpeer-review

Abstract

Local instability of an initially smooth bar made of a quasi-brittle material which is subjected to a uniaxial tensile test under the condition of displacement control is discussed, where the local instability means unstable increase in the width of the fracture zone in which damage localizes. The condition for the local instability is given in the tension-softening curve which is the relationship between the stress and the width of the fracture zone. Next, the results of ink penetration test were presented in which the test was carried out by using compact tension specimens made of granite to observe main crack growth. The boundary loading level was found, below which the region colored by ink near the initial notch tip spread not all points through the specimen thickness but above which the ink penetrated through the thickness. It is shown that the boundary loading level corresponds to a point on the tension-softening curve at which the stress is not zero. This result is discussed in connection with the local instability.

Original languageEnglish
Pages791-798
Number of pages8
Publication statusPublished - 1996
EventProceedings of the 1996 4th International Conference on Computer-Aided Assessment and Control - Fukuoka, Jpn
Duration: 1996 Jun 31996 Jun 5

Other

OtherProceedings of the 1996 4th International Conference on Computer-Aided Assessment and Control
CityFukuoka, Jpn
Period96/6/396/6/5

ASJC Scopus subject areas

  • Software

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