Vibration Analysis of Laminated Composites Using Experimental and Genetic Algorithms Optimization Technique

Abstract

In this paper, damage detection for different types of defects (delamination, crackand hole) in the composite laminate plate and cylindrical shell be used to characterizethe vibration behavior experimentally which used two types of load (plus and sineload) to find the frequency response. To this end, some plates and cylindrical shellsare made using hand-lay-up process. Glass fiber is used as a reinforcement in theform of bidirectional fabric and general purpose polyester resin as matrix for thecomposite material of plates and cylindrical shells. From the results, the damagedetection by using the Genetic algorithms is investigated. Also, these experiments areused to validate the results of free vibration obtained from the finite elementsprogram.

Keywords

• composite plate and shallow shell
• genetic algorithms
• damage detection
• dynamics tests
• natural frequency