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ASTM Selected Technical Papers
Elastic-Plastic Fracture Test Methods: The User's Experience (Second Volume)
By
JA Joyce
JA Joyce
1Mechanical Engineering Department,
U. S. Naval Academy
,
Annapolis, MD 21402
;
symposium chairman and editor
.
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ISBN-10:
0-8031-1418-4
ISBN:
978-0-8031-1418-0
No. of Pages:
351
Publisher:
ASTM International
Publication date:
1991

The purpose of this work was to identify a fracture instability data qualification limit. Transition regime fracture data were sorted to disqualify those higher Jmax valued fracture instability data which had exhibited significant prior stable crack extension. Qualified data were identified as having Jmax values below the JIc scatterband. Disqualified data had more than double the average prior stable crack extension of qualified data and had Jmax values in or above the JIc scatterband. The higher Jmax values and significant crack extension of disqualified data appeared to have been associated with a loss of constraint. The data indicated that a specimen size requirement may be needed for elastic-plastic fracture instability data that is different from those for elastic fracture instability or elastic-plastic tearing onset data. However, the value of Jmax relative to the JIc scatterband seems more to the point of identifying data that undergo fracture instability prior to significant crack extension.

1.
Landes
,
J. D.
and
Begley
,
J. A.
in
Fracture Analysis
, ASTM STP 560,
American Society for Testing and Materials
,
Philadelphia
,
1974
, pp. 170–186.
2.
Srawley
,
J. E.
and
Brown
,
W. F.
, Jr.
in
Fracture Toughness Testing and Its Applications
, ASTM STP 381,
American Society for Testing and Materials
,
Philadelphia
,
1965
, pp. 133–195.
3.
Landes
,
J. D.
and
McCabe
D. E.
in
Fracture Mechanics: Fifteenth Symposium
, ASTM STP 833,
American Society for Testing and Materials
,
Philadelphia
,
1984
, pp. 378–392.
4.
Anderson
,
T. L.
and
Dodds
,
R. H.
, Jr.
, private communication and presentation at 2nd Users' Symposium on J-Integral Test Methods,
Orlando, Florida
, 8–9 Nov. 1989.
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