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ASTM Selected Technical Papers
Computer Automation of Materials Testing
By
BC Wonsiewicz
BC Wonsiewicz
1
Bell Laboratories
,
Holmdel, N. J. 07733
;
symposium chairman and editor
.
Search for other works by this author on:
ISBN-10:
0-8031-0267-4
ISBN:
978-0-8031-0267-5
No. of Pages:
232
Publisher:
ASTM International
Publication date:
1980

A computerized test system used for the determination of the ductile fracture toughness value JIc is described. The system is comprised of a Westinghouse 2500 computer coupled to a servohydraulic test machine by a 12-bit data acquisition system. A considerable savings in time has been realized in the data reduction and plotting of the data using this system.

The possible bounds on the accuracy of the overall testing system is discussed along with the effects on the calculated JIc value due to these inaccuracies. Examples of test data on ASTM Quenched and Tempered Vacuum-Treated Carbon and Alloy Steel Forgings for Pressure Vessels (A 508-77) and HY-130 high-strength structural steel is shown along with graphic plots of the JIc results.

It is expected that a fully computer controlled test will result from this initial test program.

1.
Clarke
,
G. A.
and
Landes
,
J. D.
in
Toughness Characterization and Specifications for HSLA and Structural Steels
.
Manganon
,
P. L.
 Jr.
, Ed.,
The Metallurgical Society of the American Institute of Mining, Metallurgical, and Petroleum Engineers
, pp. 79-111.
2.
Clarke
,
G. A.
,
Andrews
,
W. A.
,
Paris
,
P. C.
, and
Schmidt
,
D. W.
in
Mechanics of Crack Growth
, ASTM STP 590,
American Society for Testing and Materials
,
1976
, pp. 27-42.
3.
Rice
,
J. R.
,
Paris
,
P. C.
, and
Merkle
,
J. G.
in
Progress in Flaw Growth and Fracture Toughness Testing
, ASTM STP 536,
American Society for Testing and Materials
,
1973
, pp. 231-245.
4.
Clarke
,
G. A.
and
Landes
,
J. D.
,
Journal of Testing and Evaluation
 0090-3973, Vol.
7
, No.
5
,
09
1979
, pp. 264-269.
5.
Clarke
,
G. A.
,
Andrews
,
W. R.
,
Begley
,
J. A.
,
Donald
,
J. K.
,
Embley
,
G. T.
,
Landes
,
J. D.
,
McCabe
,
D. E.
, and
Underwood
,
J. H.
,
Journal of Testing and Evaluation
 0090-3973, Vol.
7
, No.
1
,
01
1979
, pp. 49-56.
6.
Clarke
,
G. A.
,
Journal of Testing and Evaluation
 0090-3973, Vol.
8
, No.
3
,
09
1980
.
7.
Saxena
,
A.
and
Hudak
,
S. J.
,
International Journal of Fracture
, Vol.
14
,
1978
, pp. 453-468.
8.
Joyce
,
J. A.
and
Gudas
,
J. P.
in
Elastic Plastic Fracture
, ASTM STP 668,
American Society for Testing and Materials
,
1979
, pp. 451-468.
9.
McCabe
,
D. E.
,
Journal of Materials
 0022-2453, Vol.
7
, No.
4
,
12
1972
, pp. 449-454.
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