Title Page
Contents
Chapter 1. Introduction 8
Chapter 2. Effects of Mechanical Properties on the Impact Behavior of Nanoclay/Epoxy Composites 13
2.1. Theoretical background 13
2.2. Results and discussion 15
2.3. Conclusions 40
Chapter 3. Effect of Film Thickness on the Impact Behavior of Coating Glass Plate 41
3.1. Finite element model 41
3.2. Mathematical models 44
3.2.1. Wave propagation model 44
3.2.2. Energy balance model 45
3.3. Results and discussion 45
3.4. Conclusions 72
Chapter 4. Conclusions 73
References 75
ABSTRACT 77
List of Tables
Table 2.1. Mechanical Properties of Nanocomposites at Stacking Sequence [0/45/0/-45/0] ₂S...(이미지참조) 14
Table 2.2. Comparisons of Present Simulation and Wave Propagation Method of... 26
Table 3.1. Material Properties of Target and Impactor for Impact Analysis 43
Table 3.2. Comparison of Present Results (Max. Contact Force and Contact Duration)... 46
Fig. 1.1. Concept of a Transverse Normal According to the Classical (CLPT),... 9
Fig. 1.2. Schematic Diagram of (a) Monolithic Glass Plate (MG) and (b) Coating... 11
Fig. 2.1. Histories of (a) Contact Force-Deflection (b) Ball Displacement and (c)... 17
Fig. 2.2. Relationship of (a) Contact Force-Indentation (b) Plate Deflection-Indentation... 18
Fig. 2.3. Relationship of Contact Force and Plate Deflection of Nanocomposites at... 19
Fig. 2.4. (a) 3D Shapes (b) Contours of Plate Deflection of Nanocomposites at... 25
Fig. 2.5. Comparison of Max. Contact Force and Contact Duration between Present and... 27
Fig. 2.6. Histories of (a) Velocity and (b) Energy of Nanocomposites at Stacking Sequence... 29
Fig. 2.7. Variation of COR according to Wt.% Nanoclay of Nanocomposites at... 29
Fig. 2.8. Histories of Stresses (a) σx, (b) σy and (c) σxy of Nanocomposites at...(이미지참조) 31
Fig. 2.9. (a) 3D Shapes (b) Contours of Principal Stress σ₁ of Nanocomposites at... 37
Fig. 2.10. Variations of Stresses σ₁ through the Thickness of Nanocomposites at... 39
Fig. 3.1. Histories of Contact Force and Deflection of MG and CG by FSDT 48
Fig. 3.2. Histories of Contact Force and Deflection of MG and CG 52
Fig. 3.3. Relation of (a) Contact Force-Indentation and (b) Deflection-Indentation of MG and... 55
Fig. 3.4. Relationship of Contact Force and Beam Deflection of MG and CG 58
Fig. 3.5. (a) Energy and (b) Velocity Histories of MG and CG 60
Fig. 3.6. Variations of Stress through the Layer of MG and CG by (a) FSDT and (b) HSDT... 64
Fig. 3.7. Relationship of Maximum Stress in x-Direction and Thickness of Coated Film... 70