By Ting T.C.T.
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24, pp. 111-114. (2) Hahn, G. , Averbach, B. L, Owen, W. T. Press, Cambridge, MA, pp. 91-116. (3) Knott, J. , 1973, Fundamentals of Fracture Mechanics, Butterworths, London. (4) Hahn, G. , 1984, Metallurgical Transactions A, Vol. 15A, pp. 947-959. , Evans, A. , and Ritchie, R. , 1986, Journal of the Mechanics and Physics of Solids. Vol. 34, pp. 477-497. , C. , 1965, Acta Metallurgica, Vol. 13, pp. 591-604. , 1966, in Physical Basis of Yield and Fracture, Institute of Physics and Physical Society, London, pp.
T Fig. 3 FE mesh near the blunted crack tip. _. ~ ____ n=10 T. ~~ m-2 CT,aI0'ol&IIiD. 5 CT,aI0'ollllAZ. = 3. CT,alaoitat. 5 croDa. / CTCD.... 0 T Fig. 5 CTOD at various values of T, normalized by the CTOD at T = O. 6 - e~--~ ".. 8 -0.. 0 Fig. 6 Variation of cleavage fracture toughness vs. 9 Fig. 2 'T Fig. 5 Fig. 8 Cleavage fracture toughness variation vs. T; experiment and fitted model prediction. SHALLOW CRACK FRACTURE MECHANICS. TOUGHNESS TESTS AND APPLICATIONS TWI ~~~~~--~ul------~~~ Cambridge, UK 23-24 September 1992 PAPER 30 A framework for predicting constraint effects in shallow notched specimens T L Anderson, BSe, MSe, PhD, PE (Texas A&M University) and R H Dodds Jr, SSe, MSe, PhD (University of Illinois) SUMMARY This article outlines a model for predicting the effect of crack tip constraint on cleavage fracture toughness.
Ductile failure Hancock, Reuter and Parks (29) tested a wide range of through and part through cracked geometries of an A710 steel which fails in a ductile manner. In this, and other tough materials the start of crack tip extension is capable of a number of rather arbitrary definitions. Here failure is defined at small amounts of crack extension as shown in Figure 6. The results show a significant effect of constraint on toughness after small amounts of crack growth. lm,. The toughness of all the geometries is correctly ordered by the T stress.
Anisotropic elasticity by Ting T.C.T.