This paper demonstrates results of an experimental study on Kevlar/fiberglass composite laminates subjected to impact loading at variable temperatures. The effect of temperature on maximum energy, maximum impact force, and compression after impact was studied at several low velocity impact energy levels (8J, 15J, 25J). The temperatures considered were in the range of −50C to 120C. Results indicated that impact performance of these composites was affected over the range of temperature considered. Testing at ambient temperature is not fully sufficient and therefore additional testing must be performed for full understanding of composite laminate properties.

1.
Wagner
H. D.
,
Tuler
F. R.
,
Marom
G.
,
Time and temperature dependence of fracture in a unidirectional glass-reinforced epoxy
,
Polymer
20
(
1979
)
653
653
.
2.
Han
K. S.
,
Koutsky
J.
,
The interlaminar fracture energy of glass fiber reinforced polyester composites
,
Journal of Composite Mater.
15
(
1981
)
371
371
.
3.
Herakovich
C. T.
,
Predicting crack growth direction in unidirectional composites
,
J. Composites Mater.
15
(
1981
)
336
336
.
4.
B.Z. Jang, Y.K. Lieu, Y.S. Chang, Int. Conf. Post-Failure Analysis Techniques for Fiber Reinforced Composites (Air Force Wright aeronautical Laboratories, Dayton, OH, 1985) p. 22.
5.
R.Grove, T. Munns, B.W. Smith, Determination of crack propagation directions in graphite/epoxy structures, ASTM Special Tecjnical Publication (1987,157–73)
6.
A. j. Russell, K.N. Street, Thermal damage effects on delamination toughness of a graphit/epoxy composite, Composites Science and Technology (1988).
7.
Rojstaczer
S.
,
Cohen
D.
,
Marom
G.
,
Thermal expansion of Kevlar fibers and composites
,
J. Mater. Sci. Lett.
4
(
1985
)
1233
1233
.
8.
J.A. Narin, Wedgewood, Toughness properties and service performance of high temerture thermoplastics and their composites, SAMPE Journal (1988).
9.
Jang
B. Z.
,
Lieu
Y. K.
,
Chang
Y. S.
,
Hwang
L. R.
,
Cryogenic failure mechanisms of fiber-epoxy composites for energy applications
,
Polym. Composites
8
(
1987
)
188
188
.
10.
Herakovich
C. T.
,
Predicting crack growth direction in unidirectional composites
,
J. Composites Mater.
15
(
1981
)
336
336
.
11.
Levin, K., Effect of low velocity impact on compression strength of quasi-isotropic laminate. In proceedings of American Society for Composites: 1st Technical conference. Technomic, Lancaster, PA, 1986, pp. 313–325.
12.
Zimmerman, R. S. and Adams, D. F., Impact performance of various fibre reinforced composites as a function of temperature. In Proceeding of 32nd Int. SAMPE Symposium, Anaheim, CA, 1987, pp. 1461–1471.
13.
NASA Reference Publication 1092, “Standard Tests for Toughened Resin Composites,” NASA-Langley Research Center, Hampton, Virginia, Revised Edition, July 1983.
This content is only available via PDF.
You do not currently have access to this content.