Detection of corrosion damage in aircraft

[summer project pal]

ULTRASONIC TECHNIQUES FOR HIDDEN CORROSION DETECTION IN AIRCRAFT WING SKIN
Joby Devasia
8th Semester Mechanical Engineering

[attachment=8268]

CONTENTS
1.     INTRODUCTION

CONVENTIONAL METHODS

DEFECTS OF CONVENTIONAL METHODS

4. PRINCIPLE OF OPERATION

5. SELECTION OF WAVE MODES

6. CORROTION DETECTION

7. EQUIPMENT & INSTRUMENTATION

8. INSTRUMENT SPECIFICATIONS

9. INSPECTION RESULTS

10. ADVANTAGES & DISADVANTAGES

INTRODUCTION


CAUSE OF CORROSION – MOISTURE, WATER, CRACKS

AREAS AFFECTED – SURFACE, LAP JOINTS, FASTENERS

3. NEED OF NDT

NON DESTRUCTIVE TESTS (NDT)

VISUAL INSPECTION

MAGNETIC PARTICLE TEST

LIQUID (DYE) PENITRATION TEST

X – RAY PENETRATION INSPECTION

EDDY CURRENT INSPECTION

ULTRASONIC INSPECTION

DEFECTS OF CONVENTIONAL SYSTEMS


INSPECTION FROM TOP NORMAL TO SURFACE


2. TIME CONSUMING FOR POINT TO POINT INSPECTION


3. INABILITY TO DETECT (a) DISBONDS IN MULTILAYER

(b) FATIGUE CRACKS AT FASTNERS