TY - JOUR
T1 - Fracture toughness evaluation of small thin ceramic specimens
AU - Sherman, Dov
PY - 1997/7
Y1 - 1997/7
N2 - A test method to evaluate the fracture toughness, KIC, of thin, small, precracked ceramic specimens is described. The method is applicable for thin plates, wafers, self-supported layers, etc., especially when a large amount of material is not available for testing. The method consists of bonding a small, thin single-edge notched beam on one side of a metallic beam. A stress-free precrack with a square root singularity is achieved when the assembly is deformed in three-point bending. The fracture toughness of a thin, alumina single-edge precracked beam was evaluated experimentally using this method, and compared with that obtained for similar specimens having a 0.3-mm-wide machined notch. Comparison with previously reported fracture toughness values suggests that even a very sharp machined notch overestimates the evaluated fracture toughness.
AB - A test method to evaluate the fracture toughness, KIC, of thin, small, precracked ceramic specimens is described. The method is applicable for thin plates, wafers, self-supported layers, etc., especially when a large amount of material is not available for testing. The method consists of bonding a small, thin single-edge notched beam on one side of a metallic beam. A stress-free precrack with a square root singularity is achieved when the assembly is deformed in three-point bending. The fracture toughness of a thin, alumina single-edge precracked beam was evaluated experimentally using this method, and compared with that obtained for similar specimens having a 0.3-mm-wide machined notch. Comparison with previously reported fracture toughness values suggests that even a very sharp machined notch overestimates the evaluated fracture toughness.
UR - http://www.scopus.com/inward/record.url?scp=0031193073&partnerID=8YFLogxK
U2 - 10.1111/j.1151-2916.1997.tb03071.x
DO - 10.1111/j.1151-2916.1997.tb03071.x
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:0031193073
SN - 0002-7820
VL - 80
SP - 1904
EP - 1906
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 7
ER -