Acoustic fatigue of carbon fibre structures
Abstract
Based on the acoustic fatigue endurance curve of CFRP-probes (Carbon Fibre Reinforced Plastic) obtained within the BRITE EURAM PROGRAMME - ACOUFAT further investigations have been carried out with respect to (1) nonlinearities in the measurements for the calibration of the different transducers; (2) effects of residual strength for the coupons; (3) effects of moisture and temperature in the material due to storage and testing in humid environment. For one chosen coupon type, the sum of these effects leads to a reduction of the allowable strain in the range of high cycles by a factor of approximately 4 compared to the value obtained originally for the coupon using the 2 percent failure criterion and tested at room temperature. The modifications are considered step by step and the resulting curve is given in this paper.
- Publication:
-
In AGARD
- Pub Date:
- September 1994
- Bibcode:
- 1994icla.agarQ....M
- Keywords:
-
- Acoustic Fatigue;
- Carbon Fiber Reinforced Plastics;
- Composite Structures;
- Fatigue Tests;
- Moisture;
- Residual Strength;
- Fatigue (Materials);
- Fatigue Life;
- S-N Diagrams;
- Temperature Effects;
- Acoustics