A Modeling Method for Mesoscopic Hotspot Physical Model of Energetic Materials
A physical model and modeling method technology, applied in the thermal analysis of materials, thermal development of materials, and analysis of materials, etc., can solve problems such as the construction method report of mesoscopic thermophysical models of energetic materials that have not been discovered, and achieve easy implementation and comprehensive functions Effect
Active Publication Date: 2018-11-27
PLA SECOND ARTILLERY ENGINEERING UNIVERSITY
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[0006] In the prior art prior to the present invention, the documents retrieved include: [1] Liu Libin et al. Numerical calculation of the influence of temperature on the safety and energy of propellant [D]. Acta Ballistica Sinica. 2004: 2; [2] Tao Wenfile. Numerical heat transfer [M]. Xi'an Jiaotong University Press, 2001; [3] Du Zhiming. Hot ignition of chemical exothermic systems in a limited space [D]. Beijing: Beijing Institute of Technology, 1993; [4] Jing Songji. Research on the cook-off mechanism of condensed explosives and two-dimensional numerical simulation [D]. Changsha: National University of Defense Technology, 2004; the above-mentioned documents are related to the technical subject of the present invention. Report on the Construction Method of Mesoscopic Thermophysical Model of Energy Materials
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[0038] The following will take the hydroxybutylated propellant (the energetic particles are AP particles, and the binder matrix is butylhydroxybutylated HTPB) as an example to illustrate the modeling method of the mesoscopic thermophysical model through the construction of its mesoscopic hotspot physical model.
[0039] Step 1: Determine the heat capacity and thermal conductivity of the component materials by DSC method and laser thermal conductivity method.
[0040] Step 1.1 uses differential scanning calorimetry (DSC) method to obtain the heat capacity of energetic particles and binder matrix.
[0041] High-purity nitrogen atmosphere, the flow rate is 40ml / min; the adhesive matrix sample is pre-processed into a flat disc-shaped specimen with a thickness of 1mm and a diameter of 6mm; the energetic particle powder sample is directly loaded into the sample tray, and the sample Shake the sample plate lightly when cleaning, so that the contact between the samples and between th...
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Abstract
The invention belongs to the technical field of energetic material thermo-safety and relates to a method for building an energetic material mesoscopic hot spot physical model. The method comprises thermal decomposition mechanism function and parameter determination, energetic material microstructure surface morphology evolution rule research, energetic material microstructure inner morphology evolution rule research and energetic material ingredient thermal physical constant determination. The method fully considers characteristics of energetic material self-damage, provides convenience and versatility for selection of interface model parameters of energetic material microscopic damage numerical simulation, builds a physical simulation rule system and a mesoscopic hot physical model satisfying the rule through complete simulation and prediction of practical characteristics and processes, has complete functions and can be implemented easily.
Description
technical field [0001] The invention belongs to the technical field of thermal safety of energetic materials, and relates to a modeling method of a mesoscopic thermophysical model of energetic materials. Background technique [0002] Thermal decomposition of energetic materials is usually accompanied by heat release. If the heat released by thermal decomposition cannot be diffused to the surrounding environment, it may cause spontaneous combustion or even an explosion accident. [0003] At present, the physical model of thermal safety is mainly a chemical reaction-heat transfer model based on the assumption of macroscopic homogeneity. The deep-seated mechanism of thermal safety of materials does not play a predictable role in the formulation design and danger of thermal safety of energetic materials. [0004] The mesoscopic scale of energetic materials determines their thermal safety and thermal explosion mechanism. On the mesoscopic scale, energetic materials are heteroge...
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IPC IPC(8): G01N25/00G01N25/20
CPCG01N25/00G01N25/005G01N25/20
Inventor 赵玖玲强洪夫赵久奋张文海
Owner PLA SECOND ARTILLERY ENGINEERING UNIVERSITY
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