Theses and Dissertations

Prateek Jolly

Issuing Body

Mississippi State University

Advisor

Jha, Ratneshwar

Committee Member

Lacy, Thomas E.

Committee Member

Sullivan, Rani W.

Date of Degree

5-7-2016

Document Type

Graduate Thesis - Open Access

Major

Aerospace Engineering

Degree Name

Master of Science

College

James Worth Bagley College of Engineering

Department

Department of Aerospace Engineering

Abstract

Bonding composite structures using adhesives offers several advantages over mechanical fastening such as better flow stress, weight saving, improved fatigue resistance and the ability to join dissimilar structures. The hesitation to adopt adhesively bonded composite joints stems from the lack of knowledge regarding damage initiation and propagation mechanisms within the joint. A means of overcoming this hesitation is to continuously monitor damage in the joint. This study proposes a methodology to conduct structural health monitoring (SHM) of an adhesively bonded composite lap joint using acoustic, guided Lamb waves by detecting, locating and predicting the size of damage. Finite element modeling of a joint in both 2D and 3D is used to test the feasibility of the proposed damage triangulation technique. Experimental validation of the methodology is conducted by detecting the presence, location and size of inflicted damage with the use of tuned guided Lamb waves.

URI

https://hdl.handle.net/11668/19197

Comments

PZT||Lap joint||Vibrometer||Composite materials||Lamb waves||Adhesive bonding

Download

Share

COinS