Extraction of Coupling Stiffness of Specimens Printed with Selective Laser Melting using Modal Analysis
Modal analysis is an affordable form of nondestructive evaluation (NDE) for many forms of manufacturing. Developments in Additive Manufacturing (AM) have enabled the printing of sophisticated metal parts in processes like Selective Laser Melting (SLM). In most metallic AM processes fabrication is conducted on a build plate, which allows for convenient fixturing for model analysis. However, many build plate contain multiple parts that introduces the challenge of dynamic coupling where the dynamic characteristics of other specimens appear in the frequency analysis of the specimen that is being analyzed. The dynamic coupling can obscure the analysis, especially for prints with multiple identical parts. This work sets a foundation for a method to improve the modal analysis of multiple AM parts fabricated on a single build plate by estimating the coupling stiffness between two specimens with similar modal characteristics.
B. West et al., "Extraction of Coupling Stiffness of Specimens Printed with Selective Laser Melting using Modal Analysis," Conference Proceedings of the Society for Experimental Mechanics Series, vol. 3, pp. 275-282, Springer New York LLC, Feb 2019.
The definitive version is available at https://doi.org/10.1007/978-3-319-74793-4_32
36th IMAC, A Conference and Exposition on Structural Dynamics (2018, Feb. 12-15, Orlando, FL)
Mechanical and Aerospace Engineering
Intelligent Systems Center
Keywords and Phrases
Additive Manufacturing; Coupling; Laser Doppler Vibrometery; Modal Analysis; Selective Laser Melting
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Article - Conference proceedings
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