Porosity estimation using wave propagation based methodology for structural health monitoring of a composite beam

V. Ajith; S. Gopalakrishnan

doi:10.1117/12.879873

18 April 2011 Porosity estimation using wave propagation based methodology for structural health monitoring of a composite beam

V. Ajith, S. Gopalakrishnan

Author Affiliations +

Proceedings Volume 7984, Health Monitoring of Structural and Biological Systems 2011; 79842S (2011) https://doi.org/10.1117/12.879873
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

Abstract

In this paper, a new method is developed to quantify the defect due to porosity in a composite structure using the principle of wave propagation in structures. A model developed, based on a modified rule of mixture is used to include the influence of porosity on the stiffness and density of the composites. The values thus obtained from the modified rule of mixture model are used in a conventional spectral finite element model to develop a new model for solving wave propagation problems for porous laminated composites. The influence of the porosity content on the spectrum relations, dispersion relations and the velocity responses is studied first, in the forward problem. These numerically obtained responses are further used for the estimation of porosity in a measured response, by solving a nonlinear optimization problem.

Citation Download Citation

V. Ajith and S. Gopalakrishnan "Porosity estimation using wave propagation based methodology for structural health monitoring of a composite beam", Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 79842S (18 April 2011); https://doi.org/10.1117/12.879873

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