A Critical Evaluation of Indentation Techniques for Measuring
Fracture Toughness: 11, Strength Method
P. CHANTIKUL, G. R . ANSTIS, B . R . LAWN,* and D. B . MARSHALL*
Department of Applied Physics, School of Physics, University of New South Wales, New Sou
J . Am. Ceram Soc., 73 (21 187-205 (1990)
Perspective on the Development of
Anthony G. Evans*
M aterials Department, College of Engineering,
University of California, Santa B arbara, California 93106
J Mater Sci (2010) 45:40634066
The fracture energy of brittle crystals
S. W. Freiman J. J. Mecholsky Jr.
Received: 1 December 2009 / Accepted: 6 April 2010 / Published online: 22 April 2010
Springer Science+Business Media, L
Problem 2.1 g in Green
api aqi = dpq
d11 = d 22 = d 33 = 1
d12 = d13 = d21 = d23 = d31 = d32 = 0
Therefore, this is a second order tensor with the diagonal terms equal to one and the
other terms zero.
api and aqi are direction cosines; therefore aij = 1 f
N.B.: Problems 2.4d and 2.4h in Complete Homework Sheet are
incorrect. Below are the solutions.
Problem 2.4d in Green
ijs = 0.05 when I = j and ijs = 0 when I j.
11D = 33D -= 0.01; 22D = 23D = 32D = 0.02
13D = 12D =21D = 31D = 0
The axes are
Biomimetic Design of a
J. J. Mecholsky, Jr.
Materials Science and Engineering
University of Florida
July 19, 2010
Properties Strength & Toughness
September 1981 A Critical Evaluation ,of I ndentation Techniques f or Measuring Fracture Toughness: I 5 33
H. P. Kirchner and R. M. Gruver, Fracture Mirrors in Alumina Ceramics,
ibid., 2 1433-46 (1973).
H.P. Kirchner, The Strain Intensity Criterion f
Phase analysis of sintered yttria-zirconia ceramics by x-ray
National Institute for Materials Research, CSIR, P.O. Box 395, Pretoria, South Africa
Department of Ceramics, University ofLeeds, Leeds LS2 9JT, England
Characteristic Markings Are Observed
on the Fracture Surface
Characteristic Features Aid Failure
KC = Y (c)1/2
c = (a b )1/2
KBj = Y (rj)1/2
rj / c = consta
EMA 6715 Midterm Examination [Part 1]
October 21, 2010 Name W»? S 772/1},
Closed book examination.
If you think that one or more of your answers needs clarication, please write on reverse side citing the
1. The Eulerian innitesimal strain
D. L. Shelleman,1 O. M. Jadacm,2 J. C. Conway, Jr.,3 and]. J. Mecholsky, Jr.4
Prediction of the Strength of Ceramic Tubular Components:
Part |I'Experimental Verification
REFERENCE: Shelleman, D. L., Jadaan, O. M., Conway, J. 0, Jr.,
and Mecholsky, J.