Phase Changes and Damping in Crystalline Materials

Wolfenden, A; Cook, L. S.; Wolla, JM

doi:10.1520/stp17958s

Cited by 1 publication

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“…During friction stir processing the grain size is dramatically reduced. This change in microstructure has been studied and its effects on damping [1][2][3][4][5][6][7][8][9]. The change in microstructure and higher elongation increases the energy absorption of the friction stir welded joint making it suitable for vibration and shock applications.…”

Section: Introductionmentioning

confidence: 99%

Friction Stir Processing of Aluminum for Enhanced Passive Damping: Modeling and Testing of Two Structures

Musil¹,

Evuri²,

Korde³

et al. 2012

53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

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Weight is always of high importance in any aerospace application. Increases in performance are necessary while maintaining or reducing weight. Sandwich construction is one way to use light weight materials in aerospace applications. Such structures may be fabricated using friction stir processing (FSP). Friction Stir Processing provides a way to address the issue of increasing the energy absorbing or damping capabilities of a material (damping factor) while maintaining a lightweight structure. The goal of this paper is to investigate analytical and experimental models that would provide insight into the structural dynamics of sandwich plates and other friction stir processed parts. An analytical formulation for treatment of sandwich structure dynamics was investigated in this work. Analytical models were developed for uniaxial bending with cantilever boundary conditions. Free vibrations were considered and validated experimentally. In addition, as part of this project, the impulse response functions of Friction Stir Processed bars were investigated with a view to understanding their damping performance. Results were obtained both from drop testing and flight testing of these bars. Friction Stir Processing proved to be an effective way to passively damp the system. Nomenclature

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Section: Introductionmentioning
confidence: 99%

Friction Stir Processing of Aluminum for Enhanced Passive Damping: Modeling and Testing of Two Structures
Musil¹,
Evuri²,
Korde³
et al. 2012
53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
0
0
0
0
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Phase Changes and Damping in Crystalline Materials

Cited by 1 publication

References 0 publications

Friction Stir Processing of Aluminum for Enhanced Passive Damping: Modeling and Testing of Two Structures

Friction Stir Processing of Aluminum for Enhanced Passive Damping: Modeling and Testing of Two Structures

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