Advancements in Optical Methods & Digital Image Correlation in Experimental Mechanics, Volume 3 (eBook)

Preface 6
Contents 7
1 Digital Projection Speckle Technique for Fringe Generation 9
Introduction 9
Experimental Procedures 9
Principle of the Method 11
Results 11
Conclusion and Discussion 12
References 15
2 Quantifying Wrinkling During Tow Placement on Curvilinear Paths 16
Introduction 16
Experiments 16
Experimental Results and Discussion 17
References 19
3 Experimental Mechanics, Tool to Verify Continuum Mechanics Predictions 20
Introduction 20
Determination of the Local Kinematic Variables 21
Transformation of Recorded Gray Levels into Vectorial Fields 22
Analysis of the Displacement Functions in the Complex Plane 24
Derivatives of the Displacements 25
Displacement Vector and Metric Properties 26
Rigid Body Rotation of an Element of Area 27
Properties of the Symmetric Part of the Tensor 27
Additional Information From the Kinematics of the Continuum 29
Connecting Kinematical Variables and Dynamic Variables 29
Constitutive Functions 31
Applications of the Derived Relationships of Continuum Kinematics to Experimental Data of Derivatives 32
Experimental Observations Related to the Concept of RVE 33
Experimental Verification of Constitutive Equations Relationships 34
Discussion and Conclusions 39
References 39
4 Study the Deformation of Solid Cylindrical Specimens Under Torsion Using 360 DIC 40
Introduction 40
Specimen and Experiment 40
Analysis 41
Conclusions 42
5 Multiscale XCT Scans to Study Damage Mechanism in Syntactic Foam 43
Introduction 43
Experiment and Results 44
6 An Investigation of Digital Image Correlation for Earth Materials 46
Introduction 46
Sample Preparation 47
Experimentation 47
Conclusion 50
References 50
7 Dynamics of Deformation-to-Fracture Transition Based on Wave Theory 51
Introduction 51
Theory 52
Numerical Analysis 53
Finite Element Model (FEM) 53
General Argument Regarding Transition to Fracture 53
Numerical Tests 55
Concluding Remarks 58
References 59
8 Fatigue Monitoring of a Dented Pipeline Specimen Using Infrared Thermography, DIC and Fiber Optic Strain Gages 60
Introduction 60
Material and Experimental Procedure 61
Finite Element Model (FEM) 63
Results and Discussion 64
Conclusions 68
References 68
9 Development of Optical Technique For Measuring Kinematic Fields in Presence of Cracks,FIB-SEM-DIC 70
Introduction 70
Experimental Procedures 71
Making Speckles by FIB 71
Good Practice of SEM Imaging for Metrology 72
Displacement Error Evaluations 72
Separation of Cracks and Strains Using a Heaviside-Digital Image Correlation Method 73
Application and Analysis on a Composite Metallic Material Al/-Al-Cu-Fe 74
Material Global Characteristics 74
Marking Process and Specimen Dimension 74
First Results 75
Conclusions 76
References 76
10 DIC Determination of SIF in Orthotropic Composite 78
Introduction 78
Analytical Background 78
Analytical-Experimental Hybridization 80
Summary and Conclusions 81
References 81
11 Determining In-Plane Displacement by Combining DIC Method and Plenoptic Camera Built-In Focal-Distance Change Function 82
Introduction 82
Experimental Setup 83
Results and Discussions 83
Image Dimension-Change Introduced by Adjusting Focal Length Numerically 84
Determining In-Plan Displacement by Combining Images of Different Focal Lengths 85
Conclusions 88
12 Identification of Interparticle Contacts in Granular Media Using Mechanoluminescent Material 90
Introduction 90
Material Elaboration and Experimental Setup 91
Preliminary Uniaxial Tensile Tests 92
Application to Granular Configurations 92
References 94
13 Colour Transfer in Twelve Fringe Photoelasticity (TFP) 96
Introduction 96
Algorithm for Colour Transfer Using Principal Component Analysis (PCA) 97
Performance of the Proposed Algorithm 98
Conclusion 99
References 99
14 Infrared Deflectometry 100
Introduction 100
Experimental Set-Up 101
Results 101
Conclusion and Future Work 102
References 102
15 Real-Time Shadow Moiré Measurement by Two Light Sources 104
Introduction 104
Principles 104
Test Results and Conclusion 106
References 106
16 Study of MRI Compatible Piezoelectric Motors by Finite Element Modeling and High-Speed Digital Holography 107
Introduction 107
Simulation 108
Methodology 109
Results 110
Conclusion and Future Work 113
References 113
17 Digital Volume Correlation: Progress and Challenges 115
Introduction 115
Background 115
Achievements 115
Challenges 116
References 116
18 Development of 3D Shape Measurement Device Using Feature Quantity Type Whole-Space Tabulation Method 118
Introduction 118
Principle of F-WSTM 118
Prototype and Experiment 119
Conclusion 120
References 121
19 Temporal Phase Unwrapping for High-Speed Holographic Shape Measurements of Geometrically Discontinuous Objects 122
Introduction 122
Methods 123
Results 123
Conclusion and Future Work 123
References 125
20 Projection-Based Measurement and Identification 126
Introduction 126
Background 127
Analysis 128
Conclusion 128
References 130