학위논문 (박사)-- 서울대학교 대학원 : 공과대학 기계항공공학부, 2018. 8. 여재익.The thermal behavior of energetic materials has various aspects such as slow decomposition reactions, fast explosion phenomenon, and very rapid detonation phenomenon. All these thermal behaviors of energetic material are basically based on thermal chemical reactions. Therefore, in order to numerically analyze the thermal behavior of high-energy materials, it is essential to construct an accurate chemical reaction rate equation experimentally. In this study, we have developed a chemical kinetic equation for unknown energetic materials by using the calorimetric method Differential Scanning Calorimetry (DSC). In addition, the research for explosion, detonation, and aging effects of energetic materials are numerically investigated using the established chemical reaction rate equation.
Firstly, the kinetic analysis of a heavily aluminized cyclotrimethylene-trinitramine (RDX) using Differential Scanning Calorimetry (DSC) is conducted. The Friedman isoconversional method is applied to DSC experimental data and AKTS software is used for the analysis. The pre-exponential factor and activation energy are extracted as a function of product mass fraction. The extracted kinetic scheme does not assume multiple chemical steps to describe the complex response of energetic materials
CHAPTER 1: INTRODUCTION. 1
CHAPTER 2: A Development of Thermal-Based Reactive Flow Model for Energetic Materials and Validation 6
2.1 Background and objective......... 6
2.2 DSC experiment for kinetics extraction.. 8
2.3 Reactive flow model validation 17
CHAPTER 3: Aging Effect Prediction of Energetic Materials.. 38
3.1 Background and objective......... 38
3.2 Experimental study for isoconversional kinetics calculation 41
3.3 Isoconversional kinetics calculation.. 43
3.4 Results and discussion for kinetics calculation 45
3.5 Aging-effect prediction... 56
CHAPTER 4: A Study on Multi-Scale Hot Spot Initiation of Detonation using Experiments and Simulation... 65
4.1 Background and objective. 65
4.2 Kinetics analysis of HMX-based explosive . 69
4.3 Micro-scale hot-spot simulation via Smoothed Particle Hydrodynamics. 78
4.4 Shock-to-Detonation Transition experiment and hydrocode simulation . 92
CHAPTER 5: CONCLUSION. 107
REFERENCES.. 110Docto
