MSc. Thesis Defense: Utku Güçlü

MSc. Thesis Defense: Utku Güçlü

 

MONITORING AND IDENTIFICATION OF PROGRESSIVE DAMAGE IN FIBER REINFORCED COMPOSITE STRUCTURES USING NON-DESTRUCTIVE TESTING

 

 

 

Utku Güçlü

 

Materials Science and Engineering, MSc. Thesis, 2019

 

 

 

Thesis Jury

 

Assoc. Prof. Dr. Mehmet Yıldız (Thesis Advisor), Assoc. Prof. Dr. Burç Mısırlıoğlu,

 

Assoc. Dr.  Bertan Beylergil

 

 

 

 

 

Date & Time: January 3rd, 2019 – 1 PM

 

Place: KTMM 2. Kat Toplantı Odası

Keywords: structural health monitoring (SHM), non-destructive testing (NDT), acoustic emission (AE), infrared thermography (IRT), digital image correlation (DIC), damage progression

 

 

 

Abstract

 

 

 

This study focuses on the connection between damage progression and non-destructive testing techniques to evaluate the feasibility of these techniques for structural health monitoring. To this aim, three different techniques were selected deliberately due to their focus on detecting the three different manifestations of energy that originates from damage. Feasibility of these techniques were investigated under static loading conditions with two different stacking sequences of the same carbon reinforced composite structure. Static loading conditions were selected to have more consistent progression of damage. Dynamic testing endures acoustic and thermal noise that originate due to failed components that are under friction. Therefore in order to understand the acoustic emission and thermal behavior of any material, static loading conditions enable cleaner conditions. Motivation behind using multiple stacking sequences is to understand the behavior of non-destructive testing techniques under exact changes on the structure of the sample. Since experimental setup is always kept consistent, data gathered is the reaction of testing techniques towards controlled changes in the sample.