Campus Units

Electrical and Computer Engineering, Mechanical Engineering, Center for Nondestructive Evaluation (CNDE)

Document Type

Conference Proceeding

Conference

45th Annual Review of Progress in Quantitative Nondestructive Evaluation

Publication Version

Published Version

Publication Date

5-8-2019

Journal or Book Title

AIP Conferences Proceedings

Volume

2102

Issue

1

First Page

070002

DOI

10.1063/1.5099802

Conference Title

45th Annual Review of Progress in Quantitative Nondestructive Evaluation

Conference Date

July 15-19, 2018

City

Burlington, VT

Abstract

In-line monitoring of 3D printed parts is vital if quality is to be maintained with this new manufacturing modality. Specifically, the reliable detection of pores in printed parts is vital if the finished products are to have the desired strength characteristics. In this work, we utilize COMSOL(Burlington, MA) to numerically compare a new detection method where the interferometer and laser-generated ultrasound are focused at the same spatial location. The changes in the surface response to defects in the near-field of the induced ultrasound wave are then assessed as a function of defect size and depth. Our numerical results demonstrated that the impact of defects was easier to visualize when quantifying the surface velocity as opposed to surface displacement. The amplitude of the difference is comparable to that observed when utilizing scattering of the Rayleigh wave in the detection. However, the new approach does not require a 1 mm separation between the laser-generating ultrasound spot and the interferometer improving the spatial resolution of the detection.

Comments

This proceeding may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This proceeding appeared in Bigelow, Timothy A., Benjamin Schneider, and Hossein Taheri. "Detection of pores in additive manufactured parts by near field response of laser-induced ultrasound." AIP Conference Proceedings 2102, no. 1 (2019): 070002, and may be found at DOI: 10.1063/1.5099802. Posted with permission.

Copyright Owner

The Authors

Language

en

File Format

application/pdf

Available for download on Friday, May 08, 2020

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