Page 8 - 裂尖闭合现象的全场域模型

2.4.2 Digital Image Correlation (DIC) / 28
2.4.2.1 Introduction / 27
2.4.2.2 Principles / 27
2.4.2.3 Review / 32

Chapter 3
Literature Review / 37

3.1 Introduction / 37
3.2 Analytical Evaluation of Crack Closure / 37
3.3 Methods for Experimental Evaluation of Crack Closure / 39
3.4 Concluding Remarks / 48

Chapter 4
Mathematical Model, Apparatus and Methods / 49

4.1 Introduction / 49
4.2 New Four-parameter Mathematical Model / 50
4.2.1 Introduction / 50
4.2.2 Four-parameter Model for Stress (Photoelasticity) / 53
4.2.3 Four-parameter Model for Displacement (DIC) / 61
4.3 Apparatus and Methods / 62
4.3.1 Introduction / 62
4.3.2 Specimens Employed / 62
4.3.3 Photoelasticity Experiments / 66
4.3.3.1 Material employed / 64
4.3.3.2 Equipment for fatigue testing / 64
4.3.3.3 Experimental set-up / 65
4.3.3.4 Sample annealing procedure: Preparation for fatigue testing / 66
4.3.3.5 Fatigue testing procedure / 67
4.3.3.6 Crack length measurement / 77
4.3.3.7 Calibration / 90
4.3.4 Digital Image Correlation / 96
4.3.4.1 Material / 91
4.3.4.2 Experimental setup / 92
4.3.4.3 Dantec Q-400 3D digital image correlation system / 92