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ASTM Selected Technical Papers
Fatigue and Fracture Mechanics: 27th Volume
By
RS Piascik
RS Piascik
1
NASA Langley Research Center
?
Hampton, VA 23681-0001
;
Symposium Chairman and Editor
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JC Newman, Jr Jr
JC Newman, Jr Jr
2
NASA Langley Research Center
?
Hampton, VA 23681-0001
;
Symposium Co-Chairman and Editor
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NE Dowling
NE Dowling
3
Virginia Polytechnic Institute and State University
?
Blacksburg, VA 24061-0219
;
Symposium Co-Chairman and Editor
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ISBN-10:
0-8031-2412-0
ISBN:
978-0-8031-2412-7
No. of Pages:
639
Publisher:
ASTM International
Publication date:
1997

A model to predict cleavage failure of precracked bodies in the transition region for steels was recently proposed by the author. It is based on the concept that the stress-controlled fracture of a weak link triggers the failure of the entire body. The stress that triggers fracture is predicted by a numerical crack-tip stress analysis. The model uses toughness measured at one condition as input to predict toughness at another. For example, toughness measured at one temperature can be used to predict toughness at another temperature, or toughness measured from one geometry can be used to predict toughness for another geometry.

In this paper the model is applied to predict transition toughness for some cases where the toughness is known so that the predictions from the model can be evaluated. The results show that the predictions have the same trends as many of the measured transition toughness results. The model is also applied to several component-type geometries to show that it can be used to transfer laboratory results to structural component models.

1.
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,
G. R.
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,”
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 0021-8936, Vol.
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2.
Griffiths
,
A. A.
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Phenomena of Rupture and Flow in Solids
,”
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3.
Rice
,
J. R.
, “
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,”
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 0021-8936, Vol.
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,
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4.
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,
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and
Landes
,
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, “
The J-Integral as a Fracture Criterion
,”
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, Part II, ASTM STP 514,
American Society for Testing and Materials
,
West Conshohocken, PA
,
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, pp. 1–26.
5.
Wells
,
A. A.
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,”
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,
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6.
Milne
,
I.
and
Chell
,
G. G.
, “
Effect of Size on the J Fracture Criterion
,”
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, ASTM STP 668,
Landes
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,
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,
West Conshohocken, PA
,
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7.
Milne
,
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and
Curry
,
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The Effect of Triaxiality on Ductile-Cleavage Transitions in a Pressure Vessel Steel
,”
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, Third European Colloquium on Fracture,
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8.
Hancock
,
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,
Reuter
,
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, and
Parks
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,”
Constraint Effects in Fracture
, ASTM STP 1171,
Hackett
E. M.
et al, Eds.,
American Society for Testing and Materials
,
West Conshohocken, PA
,
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, pp. 21–40.
9.
Anderson
,
T, L.
and
Dodds
,
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, “
Specimen Size Requirements for Fracture Testing in the Transition Region
,”
Journal of Testing and Evaluation, JTEVA
 0090-3973,
American Society for Testing and Materials
, West Conshohocken, PA, Vol.
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,
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, pp. 123–134.
10.
O'Dowd
,
N. P.
and
Shih
,
C. F.
, “
Family of Crack-Tip Fields Characterized by a Triaxiality Parameter: Part I—Structure of Fields
,”
Journal of Mechanics and Physics of Solids
, Vol.
39
,
1991
, pp. 989–1015.
11.
O'Dowd
,
N. P.
and
Shih
,
C. F.
, “
Family of Crack-Tip Fields Characterized by a Triaxiality Parameter: Part II—Fracture Applications
,”
Journal of Mechanics and Physics of Solids
, Vol.
40
,
1992
, pp. 939–963.
12.
Shih
,
C. F.
,
O'Dowd
,
N. P.
, and
Kirk
,
M. T.
, “
A Framework for Quantifying Crack Tip Constraint
,”
Constraint Effects in Fracture
, ASTM STP 1171,
Hackett
E. M.
et al, Eds.,
American Society for Testing and Materials
,
West Conshohocken, PA
,
1993
, pp. 2–20.
13.
Landes
,
J. D.
, “
A J-Q Model for Predicting Fracture in the Ductile-Brittle Transition
,”
International Journal of Fatigue and Fracture of Engineering Materials
, Vol.
19
, No.
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,
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, pp. 869–877.
14.
Ritchie
,
R. O.
,
Knott
,
J. F.
, and
Rice
,
J. R.
, “
On the Relationship between Critical Tensile Stress and Fracture Toughness in Mild Steel
,”
Journal of the Mechanics and Physics of Solids
, Vol.
21
,
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, pp. 395–410.
15.
Heerens
,
J.
,
Read
,
D. T.
,
Cornec
,
A.
, and
Schwalbe
,
K. H.
, “
Interpretation of Fracture Toughness is the Ductile-to-Brittle Region by Fractographic Observations
,”
Defect Assessment in Components—Fundamentals and Applications
, ESIS/EGF 9,
Blauel
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and
Schwalbe
K. H.
, Eds.,
Mechanical Engineering Publications
,
London
, pp. 659–678.
16.
Landes
,
J. D.
and
Schaffer
,
D. H.
, “
Statistical Characterization of Fracture in the Transition Region
,”
Fracture Mechanics (Twelfth Conference)
, ASTM STP 700,
American Society for Testing and Materials
,
West Conshohocken, PA
,
1980
, pp. 368–382.
17.
Landes
,
J. D.
, “
The Effect of Size, Thickness and Geometry on Fracture Toughness in the Transition
,” GKSS Report, GKSS 92/E/43,
GKSS—Furschungseentrum Geesthacht GmbH
, Geesthacht, Germany,
1992
.
18.
Heerens
,
J.
and
Petrovski
,
B.
, unpublished 20MnMoNi55 data,
1991
.
19.
Wallin
,
K.
, “
Statistical Modeling of Fracture in the Ductile to Brittle Transition Region
,”
Defect Assessment in Components—Fundamentals and Applications
, ESIS/EGF9,
Blauel
J. G.
and
Schwalbe
K. H.
, Eds.,
Mechanical Engineering Publications
,
London
,
1991
, pp. 1–31.
20.
Wallin
,
K.
, “
Fracture Toughness Transition Curve Shape for Ferritic Structural Steels
,”
Proceedings
, Joint FEFG/ICF International Conference on Fracture of Engineering Materials,
Singapore
, 6–8 August 1991, pp. 83–88.
21.
Sharobeam
,
M. H.
and
Landes
J. D.
, “
A Simplified Approach for J-Integral Evaluation for Semi-Elliptical Surface Flaws
,”
Fracture Mechanics: 25th Volume
, ASTM STP 1220,
Erdogan
F.
and
Hartranft
R. J.
, Eds.,
American Society for Testing and Materials
,
West Conshohocken, PA
,
1995
, pp. 397–414.
22.
Dodds
,
R. H.
, private communication,
1995
.
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