Shallow Crack Fracture Mechanics Toughness Tests and by Gyoujin Cho

By Gyoujin Cho

In the final decade there was an expanding knowledge that use of criteria deeply notched fracture mechanics try out specimens may end up in giant over-or-under-assessments of the true fracture durability linked to shallow floor cracks

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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. 36-45. (8) Curry, D. , and Knott, J. , 1978, Metal SCience, Vol. 12, pp. 511-514. (9) Ritchie, R. , Knott, J. , and Rice, J. , 1973, Journal of the Mechanics and Physics of Solids, Vol. 21, pp. 395-410. (10) Curry, D. , and Knott, J. , 1979, Metal SCience, Vol.

1986), in "Size effects in Fracture", 1. Mech. , London, pp. 37·46 (18) Li, Y. ,(1986), Scientia Sinica (Series A), Vol. 29, pp. 942-955. M. J. (1990) J. Mech Phys Slds. in press. R. P. 1991 J. P. 1991 J. T. (1991), ASTM Symposium on Constraint Effects in Fracture, Indianapolis. M (1991) in "Topics in Deformation and Fracture" ed Argon A. ( 1990), PhD Thesis, Department of Construction, University of Oviedo, Spain (28) Beteg6n C. ,(1990) pp 999-1002, ECF8 Turin (ed D. K. (29) Hancock, 1. , Reuter, W.

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.

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