Method for building energetic material mesoscopic hot spot physical model

A technology of physical model and modeling method, applied in the direction of material thermal development, material thermal analysis, analytical material, etc., can solve problems such as reports on the construction method of mesoscopic thermal physical model of energetic materials that have not been found, and achieve easy implementation and comprehensive functions. Effect

Active Publication Date: 2016-05-04
PLA SECOND ARTILLERY ENGINEERING UNIVERSITY
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Problems solved by technology

[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...

Method used

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  • Method for building energetic material mesoscopic hot spot physical model
  • Method for building energetic material mesoscopic hot spot physical model
  • Method for building energetic material mesoscopic hot spot physical model

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Embodiment Construction

[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 Obtaining the heat capacity of energetic particles and binder matrix by differential scanning calorimetry (DSC)

[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 the sample a...

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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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Application Information

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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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