See-Meng Ng

Document Type

Thesis - University Access Only

Award Date

2000

Degree Name

Master of Science (MS)

Department / School

Mechanical Engineering

Abstract

The only viable method to join some components is by using adhesive. These components are often subjected to dynamic loading, which may cause initiation and propagation of failure in the joint. In order to insure the reliability of these structures, their dynamic response and factors affecting their response must be understood. Dynamic response of a single lap joint subjected to an out of plane harmonic force is evaluated. The bonded joint is modeled as Euler Bernoulli beams joined with an adhesive and constrained at one end and subjected to a harmonic force at the free end. The results show that the system response is not sensitive to the damping characteristic of the adhesive. In contrast, the elastic properties, and geometry of adhesive and adherents dominate the response. Significant peel and shear stresses develop in the overlap. These stresses are confined to the edge of the overlap and their magnitude increases as the frequency approaches the natural frequency of the system. The results show that the direction of the shear stress changes as the frequency of applied load sweeps over the first natural frequency. In contrast, the peeling stress direction does not change as a result of sweeping the frequency over the first natural frequency. The introduced of void within the overlap will be another consideration for this research paper. The frequency response function of the system will be discussed with several void sizes.

Library of Congress Subject Headings

Adhesive joints
Dynamic testing

Format

application/pdf

Number of Pages

143

Publisher

South Dakota State University

Download

Share

COinS