3D-printed lens for structure-borne wave focusing and energy harvesting

S. Tol; F. L. Degertekin; A. Erturk

doi:10.1117/12.2260348

11 April 2017 3D-printed lens for structure-borne wave focusing and energy harvesting

S. Tol, F. L. Degertekin, A. Erturk

Proceedings Volume 10164, Active and Passive Smart Structures and Integrated Systems 2017; 101641M (2017) https://doi.org/10.1117/12.2260348
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2017, Portland, Oregon, United States

Abstract

In this paper, we explore 3D-printed Gradient-Index Phononic Crystal Lens (GRIN-PCL) for structure-borne focusing both numerically and experimentally. The proposed lens consists of an array of nylon stubs with different heights which is fabricated by 3D printing the PA2200 nylon. The orientation and height of the stubs are determined according to the hyperbolic secant gradient distribution of refractive index which is guided by finite-element simulations of the lowest asymmetric mode Lamb wave band diagrams. The fabricated lens is then bonded to an aluminum plate to focus the wave energy in the structure. The wave focusing performance is simulated in COMSOL Multiphysics® under plane wave excitation from a line source indicating that the focal points are consistent with the analytical beam trajectory results. Experiments are conducted with a scanning laser vibrometer and experimentally measured wave field successfully validates the numerical simulation of wave focusing within the 3D-printed GRIN-PCL domain. With a piezoelectric energy harvester disk located at the focal region of the GRIN-PCL larger power output is obtained as compared to the baseline case of energy harvesting without the GRIN-PCL on the uniform plate counterpart for the same incident plane wave excitation.

Citation Download Citation

S. Tol, F. L. Degertekin, and A. Erturk "3D-printed lens for structure-borne wave focusing and energy harvesting", Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 101641M (11 April 2017); https://doi.org/10.1117/12.2260348

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