Thermal spike test
Thermal spike test
(OP)
Hi,
Can anyone offer advice on the heating/cooling rate use in thermal spike testing of composites, for both civil and military applications??
Can anyone offer advice on the heating/cooling rate use in thermal spike testing of composites, for both civil and military applications??





RE: Thermal spike test
RE: Thermal spike test
I need to investigate if my composites are prone to matrix cracking or other failure mode when subject to thermal shock during flights.
RE: Thermal spike test
- cold ambient conditions at altitude,
- aero heating due to supersonic flight,
-??
What FAR/customer requirement is driving this need?
SW
RE: Thermal spike test
RE: Thermal spike test
The test should be somewhat more severe than the worst case expected exposure to be realistic. There are different thermo-cycles used in different industries. I'm not aware of any standard cycle in aerospace.
Just as important as the cycle is the lay-up of the laminate. Thick plies are far more likely to micro-crack than thinner ones. If I recall, a common lay-up is a 0-90 symmetric, with each ply made from three layers of prepreg, so you have six layers together in the center.
RE: Thermal spike test