Testing And Modeling Of Thermomechanical Buckling Fatigue In Combined Extreme Environments

Abstract

In light of the combined extreme environment (CEE) to which hypersonic fuselage components will be subjected, the prediction of failure and lifespan are of the utmost importance. Typical ascent-cruise-descent missions will expose panels to thermal cycling, while aerodynamic pressure facilitated by Mach 5.2 cruise speeds will superimpose mechanical vibration at acoustic frequencies. Additionally, the geometric constraint to be placed on these relatively thin structures will cause conventional mechanical fatigue with compressive mean stress. A universal column buckling test frame has been configured to allow for closed-loop feedback control of cyclic mechanical and thermal loading. The graphical user interface (GUI) associated with this test device allows users to design cyclic load profiles that idealize the thermomechanical (TMF) loading of critical panels. Data collected with this device was then used to create a model of TMF in conditions analogous to hypersonic flight.

Publication Date

1-1-2018

Publication Title

AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2018

Issue

210049

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.2514/6.2018-0097

Socpus ID

85044590542 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85044590542

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