Advancement of Optical Methods in Experimental Mechanics, Volume 3 (eBook)

Preface 6
Contents 7
1 A New Method for Improving Measurement Accuracy of Digital Image Correlation 9
1.1 Introduction 9
1.2 Algorithm 10
1.2.1 Quasi Odd Function Feature of DIC System Error 10
1.2.2 Strategy 10
1.3 Experiments 12
1.4 Conclusion 13
References 13
2 Fatigue Analysis of 7075 Aluminum Alloy by Optoacoustic Method 14
2.1 Introduction 14
2.2 Experimental Procedure 15
2.2.1 Fatigue Test 15
2.2.2 Acoustic Measurement 15
2.2.3 Dynamic Observation of Deformation Behavior of Pre-fatigued specimen 15
2.3 Result and Discussion 17
2.3.1 Effect of Fatigue Cycle on Acoustic Wave Velocity 17
2.3.2 Deformation Behavior in Tensile Test 18
2.4 Conclusion 21
References 21
3 Early Strain Localization in Strong Work Hardening Aluminum Alloy (2198 T3): 3D Laminography and DVC Measurement 22
3.1 Introduction 22
3.2 Kinematic Fields and Damage Micromechanisms 23
References 24
4 On the In-Plane Displacement Measurement by 3D Digital Image Correlation Method 25
4.1 Introduction 25
4.2 Experimental Setup 26
4.3 Results and Discussions 27
4.3.1 In-Plane Displacements at Different Depths 27
4.3.2 Out-of-Plane Displacement 29
4.3.3 Laser Triangulation Measurement 29
4.3.4 Correcting the In-Plane Displacement 30
4.4 Conclusions 31
References 32
5 Noise Reduction in Amplitude-Fluctuation Electronic Speckle-Pattern Interferometry 33
5.1 Introduction 33
5.2 Michelson Interferometer 34
5.2.1 One-Dimensional, Time Dependent Phase Analysis 34
5.2.2 Two-Dimensional Phase Analysis Based on Amplitude-Fluctuation Interferometry 35
5.2.3 Phase Fluctuation due to Environmental Disturbance 36
5.2.4 Introduction of Carrier Fringe System 37
5.3 Experimental Results and Discussions 37
5.3.1 Normal Incident Configuration 37
5.3.2 Carrier Fringe Configuration 39
5.4 Summary 42
References 42
6 Evaluating Path of Stress Triaxiality to Fracture of Thin Steel Sheet Using Stereovision 43
6.1 Introduction 43
6.2 Experimental Procedure 44
6.3 Results 45
6.4 Conclusion 47
References 47
7 Studying with a Full-Field Measurement Technique the Local Response of Asphalt Specimens Subjected to Freeze-Thaw Cycles 48
References 50
8 Mechanical Shape Correlation: A Novel Integrated Digital Image Correlation Approach 51
8.1 Introduction 51
8.2 Algorithm 52
8.3 Images 53
8.3.1 Projection of Finite Element Simulation 53
8.3.2 Masking 54
8.4 Virtual Experiments 55
8.4.1 Double Bending of Beams 55
8.4.2 Torsion of Beams 56
8.5 Conclusions 58
References 58
9 On the Boundary Conditions and Optimization Methods in Integrated Digital Image Correlation 59
9.1 Introduction 59
9.2 Virtual Test Case 60
9.3 Optimization Methods 60
9.3.1 Gauss-Newton 61
9.3.2 Trust-Region 62
9.3.3 Nelder-Mead 62
9.3.4 Comparison of the Methods 63
9.4 Conclusions 64
References 65
10 Extension of the Monogenic Phasor Method to Extract Displacements and Their Derivatives from 3-D Fringe Patterns 66
10.1 Introduction 66
10.2 Determination of the Displacement Field in 3D 66
10.3 Properties of the Fourier Transform 69
10.4 Derivation of the 4D Hyper-Sphere 72
10.5 Computation of the Derivatives of the Displacements 73
10.6 Determination of Displacements and Strains of the Heart 73
10.7 Processing of the Data Contained in MRI Tagged Images 75
10.8 Computation of the Strains 75
10.9 Discussion and Conclusions 77
References 77
11 Deformation Measurement within a Volume of Translucent Yield Stress Material Using Digital Image Correlation 79
11.1 Introduction 79
11.2 Experimental Method 79
11.3 Results 80
11.4 Discussion 80
11.5 Conclusion 82
References 82
12 Surface Deformation with Simultaneous Contact Area Measurement for Soft Transparent Media due to Spherical Contact 83
12.1 Introduction 83
12.2 Experimental Method 83
12.3 Results 84
12.4 Discussion 85
12.5 Conclusion 85
13 Towards Measuring Intergranular Force Transmission Using Confocal Microscopy and Digital Volume Correlation 86
13.1 Introduction 86
13.2 Materials and Methods 86
13.2.1 Specimens 86
13.2.2 Experimental Design 87
13.3 Preliminary Results 87
13.4 Conclusions 89
References 89
14 Using Anti-aliasing Camera Filters for DIC: Does It Make a Difference? 90
14.1 Introduction 90
14.2 Experimental Setup 90
14.3 Results 92
14.4 Conclusions 93
References 93
15 Investigation of Electronic Speckle Pattern Interferometry with Line Laser Scanning for Large Area Deformation Measurement 94
15.1 Introduction 94
15.2 Electronic Speckle Pattern Interferometry with Line Laser Scanning 94
15.3 Experiment 95
15.4 Results and Discussion 95
15.5 Conclusion 95
Reference 96
16 Internal Heat Generation in Tension Tests of AISI 316 Using Full-Field Temperature and Strain Measurements 97
16.1 Introduction 97
16.2 Experimental Procedures and Techniques 98
16.2.1 Specimen Geometry and Material 98
16.2.2 Full-Field Thermal Imaging and Calibration 99
16.3 Experimental Results 100
16.4 Summary and Conclusions 103
References 103
17 A Short Survey on Residual Stress Measurements by HDM and ESPI 104
17.1 Introduction 104
17.2 Origin of ESPI-HDM 105
17.3 Development of the Technique 105
17.4 Recent Progresses 106
17.5 Final Considerations 107
References 107
18 Feasibility of Using Fringe Projection System for Corrosion Monitoring in Metals of Interest in Cultural Heritage 110
18.1 Introduction 110
18.2 Materials and Methods 111
18.3 Results and Discussion 112
18.4 Conclusions 115
References 116