Establishment of the Approach to, and Development of, Interim Design Criteria for Sonic Fatigue
Report Number: ASD TDR 62-26
Author(s): Fitch, G. E., Dutko, T. R., Brennan, L. M., Tipton, A. G., Belcher, P. M., Wang, P., Clawson, P. A.
Corporate Author(s): North American Aviation, Inc.
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1962-06
Pages: 154
Contract: AF 33(616)-7694
DoD Project: 1370
DoD Task: 137001
Identifier: AD0284597
AD Number: AD-284 609
Abstract:
A literature survey provided the background from which an approach was selected for development of design criteria for sonic fatigue. The approach selected was accelerated, discrete frequency life-testing, the results of which are interpreted using a sine-random equivalence analysis. This approach offers the best compromise between economy, accuracy, and lead time to cover structural design problems for advanced design, design development, and prooftesting of completed vehicle structure. Methods were extracted from the literature with which to predict the acoustic environment and determine the duration of various environments from mission analysis. Fatigue data and an examination of cumulative damage are presented in support of the sine-radom equivalence technique. This method takes advantage of the extensive fatigue S-N data available in the industry. Examples of the application of the anaytical-empirical techniques are presented.
Provenance: Bombardier/Aero
Author(s): Fitch, G. E., Dutko, T. R., Brennan, L. M., Tipton, A. G., Belcher, P. M., Wang, P., Clawson, P. A.
Corporate Author(s): North American Aviation, Inc.
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1962-06
Pages: 154
Contract: AF 33(616)-7694
DoD Project: 1370
DoD Task: 137001
Identifier: AD0284597
AD Number: AD-284 609
Abstract:
A literature survey provided the background from which an approach was selected for development of design criteria for sonic fatigue. The approach selected was accelerated, discrete frequency life-testing, the results of which are interpreted using a sine-random equivalence analysis. This approach offers the best compromise between economy, accuracy, and lead time to cover structural design problems for advanced design, design development, and prooftesting of completed vehicle structure. Methods were extracted from the literature with which to predict the acoustic environment and determine the duration of various environments from mission analysis. Fatigue data and an examination of cumulative damage are presented in support of the sine-radom equivalence technique. This method takes advantage of the extensive fatigue S-N data available in the industry. Examples of the application of the anaytical-empirical techniques are presented.
Provenance: Bombardier/Aero