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http://dx.doi.org/10.9766/KIMST.2020.23.4.319

A Study on the Application Method of Steinberg Fatigue Limit Equation for Electronic Part Life Assessment of Fighter Aircraft Radar  

Kim, Deokjoo (The 3rd Research and Development Institute, Agency for Defense Development)
Hah, Seung Ryong (The 3rd Research and Development Institute, Agency for Defense Development)
Kang, Minsung (Mechanical Design Team, Hanwha Systems)
Heo, Jaehun (Mechanical Design Team, Hanwha Systems)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.23, no.4, 2020 , pp. 319-327 More about this Journal
Abstract
In this study a methodology to evaluate fatigue life of the electronic parts for the fighter radar unit under random vibration loading is presented. To do this, one parameter for the 3-σ RMS quation of Steinberg fatigue model is modified to come up with a printed circuit board(PCB) with multiple electronic parts, while fundamental frequency and dynamic deflection of the PCB are calculated from a MATLAB based finite element computer code. For the RIFA structure selected in this study, the 3-σ RMS fatigue limit displacement is reduced to 0.741 times as much as the Steinberg model. This investigation allows to assess the life of multiple electronic parts mounted on the PCB with reinforced metal cover/body showing non-sinusoidal deflection patterns.
Keywords
Steinberg Fatigue Model; PCB Vibration; Random Vibration Environment; Finite Element Method; Fighter Radar;
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