Affiliation:
1. Oakland University, Department of Mechanical Engineering
2. Oakland University
Abstract
<div class="section abstract"><div class="htmlview paragraph">Adhesively bonded joints have been applied in the automotive industry for the
past few decades due to their advantages such as higher fatigue resistance,
light weight, capability of joining dissimilar materials, good energy
absorption, and high torsional stiffness for overall body structure. They also
provide an effective seal against noise and vibration at a low cost. There
exists the challenge of defining the fatigue characteristics of adhesive joints
under cyclic loading conditions, and conventional methods have limitations in
detecting the crack initiation of a bonded joint. This study introduces a method
of detecting crack initiation by using the frequency method. It is found that
stiffness change in the system is highly correlated to change in natural
frequencies. By monitoring the change in natural frequencies, the crack
initiation can be detected.</div></div>