Extraction of Coupling Stiffness of Specimens Printed with Selective Laser Melting using Modal Analysis

Abstract

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.

Meeting Name

36th IMAC, A Conference and Exposition on Structural Dynamics (2018, Feb. 12-15, Orlando, FL)

Department(s)

Mechanical and Aerospace Engineering

Research Center/Lab(s)

Intelligent Systems Center

Comments

This work was funded by Honeywell Federal Manufacturing & Technologies under Contract No. DE-NA0002839 with the U.S. Department of Energy.

Keywords and Phrases

Additive Manufacturing; Coupling; Laser Doppler Vibrometery; Modal Analysis; Selective Laser Melting

International Standard Book Number (ISBN)

978-331974792-7

International Standard Serial Number (ISSN)

2191-5644

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2019 The Society for Experimental Mechanics, Inc. All rights reserved.

Publication Date

01 Feb 2019

Link to Full Text

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