Mr. Junghoon Sohn Profile

Junghoon Sohn

at Univ of Texas at Austin

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 9 May 2024 Presentation + Paper

Notch characterization in pipes from the scattering of helical-guided ultrasonic waves

P. Shivashankar, J. Sohn, S. Livadiotis, S. Salamone

Proceedings Volume 12951, 1295129 (2024) https://doi.org/10.1117/12.3010891

KEYWORDS: Pipes, Scattering, Ultrasonics, Wave propagation

Read Abstract +

Notches (often used to stimulate crack-like defects) in pipes are characterized using Helical-Guided Ultrasonic Waves (HGUW). In thin-walled curved structures with a radius-to-thickness ratio of more than 10/1, Lamb-type guided waves, called the HGUW, propagate. HGUW are plane-strain guided waves propagating circumferentially in helical paths in large-diameter cylindrical structures, with the properties of Lamb waves. They travel in multiple trajectories between two points, and these paths are indexed as orders of the helical path. When the HGUW encounters a notch in its path, it scatters, and the information in the scattering is used to characterize the notch (i.e., determine the notch size). In this work, an approach called the stepped wavelength method is presented to determine the notch size. In this approach, the directivity plots, quantifying from the scattering of the HGUW in all directions around the notch, are evaluated for a set of frequencies (each corresponding to a specific wavelength) from the numerical model of the pristine and damaged pipes. As the wavelength-to-notch size ratio approaches one and increases beyond that, a change in the directivity plot’s profile is witnessed, suggesting a change in the nature of the interaction between the notch and the incident wave. A criterion based on the change in the nature of interaction is developed to estimate the notch size.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years