Fatigue life prediction in frequency domain using thermal-acoustic loading test results of titanium specimen

High supersonic vehicles are exposed to high temperature generated by aerodynamic heating. Thermal protection system structures are used on the skin of the fuselage and wings to prevent the transfer of high temperatures into the interior of the vehicle. Thin skin panels can be exposed to acoustic lo...

Full description

Saved in:
Bibliographic Details
Published in:Journal of mechanical science and technology 2020, 34(10), , pp.4015-4024
Main Authors: Go, Eun-Su, Kim, Mun-Guk, Kim, In-Gul, Kim, Min-Sung
Format: Article
Language:English
Subjects:
Acoustic fatigue
Acoustic measurement
Acoustic noise
Acoustics
Aerodynamic heating
Airframes
Control
Dynamical Systems
Engine noise
Engineering
Fatigue failure
Fatigue life
Fatigue tests
Frequency domain analysis
Fuselages
High temperature
Hypersonic vehicles
Industrial and Production Engineering
Jet flow
Life prediction
Mechanical Engineering
Original Article
Sine series
Stress history
Thermal protection
Titanium
Vibration
기계공학
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:High supersonic vehicles are exposed to high temperature generated by aerodynamic heating. Thermal protection system structures are used on the skin of the fuselage and wings to prevent the transfer of high temperatures into the interior of the vehicle. Thin skin panels can be exposed to acoustic loads by high power engine noise and jet flow noise, which can cause sonic fatigue damage. Therefore, it is necessary to examine the behavior of supersonic/hypersonic vehicle skin structures under thermal-acoustic loads and to predict fatigue life. In this paper, thermal-acoustic testing of titanium specimens under thermal-acoustic load was performed. The response stress history of the specimen was obtained, and the fatigue life was predicted using the time and frequency domain fatigue life prediction method. The effect of the mean stress on the predicted results of the time and frequency domian fatigue life was analyzed. Stress history was generated using a sine series of random phases from stress PSD without phase information. The fatigue life in the generated stress history was predicted using the time and frequency domain fatigue life prediction methods. As the temperature increased, the mean stress of the response stress and the error in the frequency domain fatigue life prediction results increased. The error in the frequency domain fatigue life prediction results with the mean stress effect were greatly reduced by considering the completely reversed stress.
ISSN:1738-494X
1976-3824
DOI:10.1007/s12206-020-2212-y