Torsional waves in clad cores

Weiliang Kong; Li Zhou; Fuh-Gwo Yuan

doi:10.1117/12.817517

3 April 2009 Torsional waves in clad cores

Weiliang Kong, Li Zhou, Fuh-Gwo Yuan

Proceedings Volume 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009; 72920O (2009) https://doi.org/10.1117/12.817517
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

Abstract

Propagation of torsional elastic waves in the clad core is addressed in this paper. The shear velocity of the core is slightly smaller than that in the cladding. Core with cladding of different finite thickness and infinite thickness is investigated. Two types of modes, guided and leaky modes are examined with the discussion of motion in waveguide. Phase, group, and energy velocities, cutoff frequencies are analyzed and the results of first three modes are presented. The change of dispersion curves due to variation of thickness of cladding is discussed and it is found that when the thickness increases the results of finite clad core will approach those of infinite clad core in guided mode, but not in leaky mode. Below cutoff frequencies the wavenumber becomes complex in infinite clad core, while it is pure imaginary in finite clad cores. The group and energy velocity are presented and in leaky mode the group velocity becomes abnormal, while the energy velocity is physically meaningful.

Citation Download Citation

Weiliang Kong, Li Zhou, and Fuh-Gwo Yuan "Torsional waves in clad cores", Proc. SPIE 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009, 72920O (3 April 2009); https://doi.org/10.1117/12.817517

ACCESS THE FULL ARTICLE

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