Shearography non-destructive testing and defect characterisation of thick composite structures

Doctoral thesis (2023)

Authors

N. Tao Structural Integrity & Composites - Aerospace Engineering
Research Group
Structural Integrity & Composites (Aerospace Engineering) (TU Delft)
Copyright: © 2023 N. Tao
DOI
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https://doi.org/10.4233/uuid:4d4a1cfa-836f-415f-a255-84d49a4797a0
Composite laminates Digital shearography Speckle interferometry Strain characterisation Thick composite inspection Non-destructive testing and evaluation Defect detection and characterisation FEM-assisted inspection Spatially and temporally modulated heating
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Published Date

2023

Language

English

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Faculty

Aerospace Engineering

Department

Aerospace Structures & Materials

Research Group

Structural Integrity & Composites

Abstract

THICK composite materials, e.g., thickness of more than 50 mm, are increasingly being used across diverse industry sectors owing to their significant advantages of weightsavings, superiormaterial properties and load-carrying capability. These materials tend to be adopted in safety-critical applications such as large primary or secondary load-bearing structures, where mechanical failures would result in serious consequences. However, various defects and damage may occur in thick composites that endanger structural integrity and safety severely. Hence to improve the maintenance, safety and reliability of these structures, it is crucial to develop inspection methods capable of defect detection and characterisation for composite structures of significant thickness. To date, the nondestructive testing and evaluation (NDT&E) of thick composite structures still remain an urgent challenge due to their material and structural complexity, significant thicknesses, and the presence of various manufacturing and in-service defects....