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ASTM Selected Technical Papers
Instrumented Impact Testing
By
TS DeSisto
TS DeSisto
1
Army Materials and Research Center
,
Watertown, Mass. 02172
;
symposium chairman
.
Search for other works by this author on:
ISBN-10:
0-8031-0738-2
ISBN:
978-0-8031-0738-0
No. of Pages:
220
Publisher:
ASTM International
Publication date:
1974

The Charpy impact test is rapidly being upgraded to include instrumentation for revealing the load history of the specimen while it is being fractured in three-point bending. Unfortunately, similar interest in upgrading the Izod test (cantilever bending) has been notably lacking. The first part of this paper discusses the results of a recent study of techniques for instrumenting the Izod test. Results from both standard and nonstandard Izod specimen tests are compared with similar results from instrumented Charpy tests. Also included are the results of instrumented Izod tests of tubular specimens of aluminum, steel, and composite materials.

Instrumented low-blow testing and three-point bend testing of ring-shaped specimens are typical variations of the instrumented Charpy impact test. These two test techniques are also discussed in this paper. There is hope that these and other variations in test techniques will lead to new inexpensive methods of evaluating material and small structure behavior under adverse loading conditions.

1.
Fearnehough
,
G. D.
and
Hoy
,
C. J.
,
Journal, Iron and Steel Institute
 0021-1567 Vol.
202
,
1964
, p. 912.
2.
E 23-72, “
ASTM Standard Method for Notched Bar Testing of Metallic Materials
,”
1972 Annual Book of ASTM Standards
,
American Society for Testing and Materials
,
1972
, pp. 276–292.
3.
D 256-70, “
ASTM Standard Methods of Test for Impact Resistance of Plastics and Electrical Insulating Materials
,”
1972 Annual Book of Standards
,
American Society for Testing and Materials
,
1972
, pp. 67–83.
4.
Izod
,
E. G.
Testing Brittleness of Steel
,”
Engineering
,
25
09
1903
.
5.
Green
,
A. P.
and
Hundy
,
B. B.
,
Journal of the Mechanics and Physics of Solids
 0022-5096, Vol.
4
,
1956
, pp. 128–144.
6.
Server
,
W. L.
and
Ireland
,
D. R.
, “
General Yielding of Notched Three-Point Bend Specimens
,” Dynatup Technical Report TR72-19,
10
1972
.
7.
Brown
,
W. F.
, Jr.
and
Srawley
,
J. E.
in
Plane Strain Crack Toughness Testing of High-Strength Metallic Materials, ASTM STP 410
,
American Society for Testing and Materials
,
1966
.
8.
Orner
,
G. M.
and
Hartbower
,
C. E.
,
The Welding Journal
 0372-7203, Vol.
40
,
10
1961
, p. 459-S.
9.
Tardif
,
H. P.
and
Marquis
,
H.
,
Canadian Metals Quarterly
, Vol.
2
,
1963
, p. 373.
10.
Tuler
,
F. R.
and
Server
,
W. L.
, to be published.
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