Method for representing internal stress of TATB-based PBX under force-heat effect

A technology of thermal action and internal stress, applied in the direction of applying stable tension/pressure to test material strength, using wave/particle radiation for material analysis, measuring devices, etc., can solve the problems of complex response mechanism and weak effect of polycrystalline system

Active Publication Date: 2019-03-15
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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Problems solved by technology

[0005] (1) TATB has a planar molecular structure, and its crystal belongs to the triclinic system, which has a layered structure similar to graphite. There are strong hydrogen bonds between the TA

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  • Method for representing internal stress of TATB-based PBX under force-heat effect
  • Method for representing internal stress of TATB-based PBX under force-heat effect
  • Method for representing internal stress of TATB-based PBX under force-heat effect

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] as attached figure 1 As shown, the present invention provides a method for characterizing TATB-based PBX internal stress under a force-thermal effect, comprising the steps of:

[0047] Carry out in-situ mechanical stress / thermal stress loading on PBX, use neutron diffraction technology to obtain the lattice lattice parameters of TATB crystal, and obtain the relationship between mechanical stress, temperature and TATB lattice lattice parameters;

[0048] At the same time, use internal microstructure characterization technology to obtain the mesostructure of PBX;

[0049] The inflection point of PBX performance is obtained through the relationship between mechanical stress, temperature and TATB lattice parameters and the mesostructure, and finally the response behavior law of TATB crystal inside PBX under the action of thermal-mechanical co...

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Abstract

The invention discloses a method for representing internal stress of TATB-based PBX under a force-heat effect. The method for representing the internal stress of the TATB-based PBX under the force-heat effect comprises the following steps: loading mechanical stress/heat stress to the PBX in situ; using a neutron diffraction technology to obtain crystal lattice parameters of a TATB crystal so as toobtain relations between mechanical stress and a temperature and the crystal lattice parameters of the TATB; and meanwhile, using an internal microstructure representing technology to obtain a meso-structure of the PBX; obtaining a performance inflection point of the PBX by using the relations among the mechanical stress, the temperature and the crystal lattice parameters of the TATB and using the meso-structure; and finally, obtaining an internal TATB crystal response behavior rule of the PBX under the force-heat coupling effect. The method for representing the internal stress of the TATB-based PBX under the force-heat effect, disclosed by the invention, has the advantages that the neutron diffraction technology is introduced into the study field of energetic materials for the first time; lattice parameters, such as displacement, widening and asymmetry, of a TATB crystal diffraction peak in the PBX under the mechanical stress/heat stress is non-destructively observed in a non-invasive manner, so that basic parameters can be provided for macro-performance evaluation of the energetic materials.

Description

technical field [0001] The invention relates to a method for characterizing the internal stress of explosives, in particular to a method for characterizing the internal stress of TATB-based polymer bonded explosives under the action of force and heat. Background technique [0002] TATB (1,3,5-triamino-2,4,6-trinitrobenzene) is currently the only insensitive explosive approved by the US Department of Energy, because of its low mechanical and thermal sensitivity, it has good safety and stability. Polymer bonded explosive (PBX) based on TATB powder crystals (TATB powder crystals) has been widely used in the weapon industry at home and abroad, and researches on its structural safety performance, mechanical properties and detonation performance have been carried out at home and abroad. Always hot. [0003] TATB-based PBX is formed by granulating TATB explosive crystals and binders into TATB granules (TATB granules) with a certain particle size distribution by water suspension m...

Claims

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Application Information

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IPC IPC(8): G01N3/18G01N3/06G01N23/046G01N23/207G01N23/2251G01N23/202
CPCG01N3/06G01N3/18G01N23/046G01N23/202G01N23/2076G01N23/2251G01N2203/0075G01N2203/0228G01N2203/0641G01N2203/0676G01N2203/0682
Inventor 徐尧刘晨肖盼戴斌杨占锋李丽李海宁何荣芳
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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