Premium
Use of Fracture Mirrors to Interpret Impact Fractures in Brittle Materials
Author(s) -
KIRCHNER H. P.,
GRUVER R. M.,
SOTTER W. A.
Publication year - 1975
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1975.tb11440.x
Subject(s) - fracture (geology) , brittleness , materials science , rod , composite material , modulus , brittle fracture , ceramic , stress (linguistics) , forensic engineering , medicine , linguistics , philosophy , alternative medicine , pathology , engineering
The impact resistances and fracture mirror radii ( r m ) of rods of several ceramic materials were measured. The fracture stresses (σ f ) were determined from σ f vs r m −1/2 curves obtained from fiexural strength tests. An analysis, based on the assumption that the principal factor contributing to the impact energy absorbed is the energy ( U e ) required to deflect the specimen to the fracture stress, indicated that the impact energy absorbed ( U ) per unit of specimen cross‐sectional area ( A ) increased in proportion to the square of the maximum stress. The analysis also indicated that the slopes of the curves of U/A vs σ f 2 are proportional to the reciprocal of Young's modulus. Experimental data for several materials are consistent with this analysis.