WU Huayong,LIU Wenping. Effect of residual stress on dynamic properties of the micro-membrane[J]. Journal of Mechanical Strength,2026,48(1):88-92. DOI: 10.16579/j.issn.1001.9669.2026.01.011.
EFFECT OF RESIDUAL STRESS ON DYNAMIC PROPERTIES OF THE MICRO-MEMBRANE
Aiming at the residual stress problem in micro-electro-mechanical system (MEMS) films
research on the dynamic performance of micro-membrane with residual stress was conducted.
Methods
2
Firstly
a mathematical model of thin micro-plates with residual stress was established. The influence law of residual stress on the natural frequency and vibration mode of micro-membrane was studied
and the influence of residual stress on the transition of behavioral characteristics between plates and films was discussed. Then
the stability of micro-membrane with residual stress was studied based on the minimum potential energy principle. Measures for preventing the buckling of micro-membrane were proposed
and the vibration response of micro-membrane under harmonic excitation was analyzed.
Results
2
The results show that residual stress could induce the transition of behavior between plates and films; it has a significant impact on natural frequency but a slight effect on vibration mode. The instability of micro-membrane could be effectively prevented by adjusting the structural parameters and preparation process of the films. Moreover
the influences of residual stress on the natural frequency and vibration displacement of micro-membrane presented opposite variation trends. The research results have important reference significance and application value for the development of MEMS based on micro-membrane structures.
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