Journal
INTERNATIONAL JOURNAL OF FRACTURE
Volume 125, Issue 1-2, Pages 171-187Publisher
SPRINGER
DOI: 10.1023/B:FRAC.0000021076.76987.62
Keywords
crack opening displacement; digital image correlation; probabilities and statistics; sandwiched-beam technique; SiC ceramic; single-edge notched beam
Categories
Ask authors/readers for more resources
An experimental procedure is developed to determine the scatter of the macroscopic toughness of brittle materials. First, samples are precracked to obtain a sharp precrack. The toughness is then determined by using a standard three-point flexural test. Digital image correlation is used to analyze displacement fields of cracked samples. Based upon the resolution and the spatial resolution of the measurement technique, a detection criterion is proposed and validated. It allows for an accurate estimate of the crack tip location so that the presence of a crack and its size at arrest can be monitored. As an example, the toughness distribution of 18 samples made of silicon carbide is evaluated. By using a simple macro-micro transition, an analysis of the scatter in toughness is related to that in strength for the material with no macrocracks.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available