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ASTM Selected Technical Papers
Foreign Object Impact Damage To Composites
By
LB Greszczuk
LB Greszczuk
1
McDonnell Douglas Astronautics Co.
,
Huntington Beach, Calif. symposium chairman
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ISBN-10:
0-8031-0357-3
ISBN:
978-0-8031-0357-3
No. of Pages:
252
Publisher:
ASTM International
Publication date:
1975

An analogy between damage inflicted by a single-point hard-particle impact and damage inflicted by inserting a flaw of known dimensions in a static tensile coupon is discussed. The results suggest that residual strength can be predicted as a function of kinetic energy of impact by executing two experiments, a static tension test on an unflawed specimen and a static tension test on a coupon previously subjected to a single-point impact. The model appears to be accurate for impact velocities which are less than the penetration velocity. For velocities above complete penetration, the residual strength is identical to the static strength of a coupon with a hole having the same diameter as the impacting particle. Comparison of various materials indicates that the impact strength of composite materials is strongly influenced by the strain energy to failure of the reinforcement.

1.
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,
J. C.
,
Jerina
,
K. L.
, and
Johnson
,
T. A.
,
Analysis of Test Methods for High Modulus Fibers and Composites, ASTM STP 521
,
American Society for Testing and Materials
,
1973
, pp. 5–64.
2.
Purcell
W.
, private communication, Engineering Office, Aeronautical Systems Division,
Wright-Patterson Air Force Base
, Ohio,
1973
.
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,
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,
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,
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and
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, and
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,
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,
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, pp. 446–454.
7.
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,
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and
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,
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 0021-9983, Vol.
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,
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, pp. 1–19.
8.
Novak
,
R. C.
and
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,
M. A.
,
Composite Materials: Testing and Design (Second Conference), ASTM STP 497
,
American Society for Testing and Materials
,
1973
, pp. 311–323.
9.
Chamis
,
C. C.
,
Hanson
,
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, and
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,
Composite Materials: Testing and Design (Second Conference), ASTM STP 497
,
American Society for Testing and Materials
,
1973
, pp.324–349.
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