| 摘要 | 第1-5页 |
| Abstract | 第5-8页 |
| 1 Introduction | 第8-17页 |
| ·Background | 第8-9页 |
| ·Study contents and research strategy | 第9-11页 |
| ·Literature review | 第11-14页 |
| ·Construction and organization of the thesis | 第14-16页 |
| Reference | 第16-17页 |
| 2 Stress Field Near a Crack Tip | 第17-27页 |
| ·Elementary equations of elastic mechanics theory | 第17-18页 |
| ·Complex stress functions | 第18-20页 |
| ·Solutions to mode Ⅰ crack problems | 第20-22页 |
| ·Solutions to mode Ⅱ and Ⅲ crack problems | 第22-23页 |
| ·The crack tip plastic zone | 第23-25页 |
| ·High order terms of stress near around the crack tip | 第25-26页 |
| Reference | 第26-27页 |
| 3 Material Properties of PVDF Film | 第27-36页 |
| ·Introduction | 第27页 |
| ·PVDF film and its material properties | 第27页 |
| ·Piezoelectric constitutive law | 第27-30页 |
| ·Relationship between stresses and electric potentials | 第30-35页 |
| Reference | 第35-36页 |
| 4 Stress Distribution Measurement Near a Crack Tip With PVDF Films | 第36-56页 |
| ·Experimentally estimating the relationship | 第36-40页 |
| ·Electric circuit and main equipments | 第36-37页 |
| ·Experiment results | 第37-40页 |
| ·Electric potential of laminated PVDF films | 第40-43页 |
| ·No. Number of layers of PVDF films Angle to loading Output voltage | 第43-54页 |
| ·Electric circuit design for experiment and main equipments | 第44-45页 |
| ·Experiment results and data process | 第45-47页 |
| ·Numerical calculation and results comparison | 第47-54页 |
| ·Conclusions | 第54-55页 |
| Reference | 第55-56页 |
| 5 Stress Intensity Factor (SIF) Measurement With Piezoelectric Element | 第56-71页 |
| ·Stress near the crack tip | 第56-57页 |
| ·SIF measurement using piezoelectric elements and electrostatic voltmeter | 第57-60页 |
| ·Isotropic piezoelectric element made of PVDF films | 第60-61页 |
| ·Estimation of parameter a for PVDF film | 第61-62页 |
| ·SIF measurement of two-dimensional cracks | 第62-66页 |
| ·Experiment design and main equipments | 第62-63页 |
| ·Experiment results | 第63-66页 |
| ·Numerical calculation | 第66-69页 |
| ·Comparisons of results from experiment and calculation | 第69-70页 |
| ·Conclusions | 第70页 |
| Reference | 第70-71页 |
| Conclusions | 第71-73页 |
| 攻读硕士学位期间发表学术论文情况 | 第73-74页 |
| Acknowledgement | 第74-75页 |
| 大连理工大学学位论文版权使用授权书 | 第75页 |
