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Strain gauge assembly and test method for testing thermoset cast pbx cure stress

A technology for curing stress and strain gauges, applied in the measurement of elastic deformation force by measuring gauges, and the measurement of permanent deformation force by measuring gauges, etc., can solve the problem of inability to obtain the curing stress of explosives, and achieve stability and reliability. stability problem, constant gage factor, good compatibility

Inactive Publication Date: 2016-08-17
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This curing stress can only represent the total stress of the material inside the bomb, and it is impossible to obtain the curing stress of explosives at different positions in the bomb

Method used

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  • Strain gauge assembly and test method for testing thermoset cast pbx cure stress
  • Strain gauge assembly and test method for testing thermoset cast pbx cure stress
  • Strain gauge assembly and test method for testing thermoset cast pbx cure stress

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Embodiment

[0061] In this embodiment, YE3818 dynamic strain gauge (universal dynamic strain amplifier) ​​and 120Ω BB120-44A (11) 250 high temperature strain gauge are used to test the curing stress at two different positions in the body of the 1000ml thermosetting PBX curing process, wherein The curing temperature was 80°C. The test data is collected by GEN5i of HBM Company, the collection frequency is 10 / s, and the collection period is 18h.

[0062] The composition of thermosetting cast PBX is: hydroxyl-terminated polybutadiene, aluminum powder, dioctyl adipate, 2,4-toluene diisocyanate, triphenylbismuth, RDX and OCTOGEN, with a density of 1.62g / cm3~1.70g / cm3.

[0063] The basic performance parameters of the substrate are: density 1.64g / cm3; tensile modulus 15.6Mpa; thickness 2mm, length 12mm, width 6mm; strain gauge length 8mm, width 4mm.

[0064] Test steps:

[0065] (1) Make 10 substrates of 2.0×6.0×12.0mm, and calibrate the gauge factor between the substrate and the strain gauge...

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Abstract

The invention relates to a strain gauge assembly for testing the curing stress of a thermosetting pouring PBX and a testing method thereof. The strain gauge assembly for testing the curing stress of the thermosetting pouring PBX comprises a base material and a strain gauge which is wrapped in the base material, the strain gauge is in a tiling shape in the base material, and the base material is composed of hydroxyl-terminated polybutadiene, dioctyl adipate, aluminite powder, 2 / 4- toluene diisocynate and triphenylbismuthine. The testing method of the curing stress of the thermosetting pouring PBX comprises the steps of calibrating the strain gauge assembly, arranging the strain gauge assembly, pouring an elastic body, and testing the stress in the curing process. The strain gauge assembly can be randomly placed at different positions in the pouring PBX, in the testing process, the compatibility of the base material and chemical slurry is good, the strain gage can not be curled or corroded by liquid chemical slurry due to the protection of the base material, and the testing effect on the curing stress of the pouring PBX is obvious.

Description

technical field [0001] The invention belongs to the technical field of propellant and explosive performance detection, and in particular relates to a strain gauge assembly and a test method for testing the curing stress of thermosetting cast PBX. Background technique [0002] The curing stress of thermosetting cast PBX directly affects the mesoscopic physical structure of explosives, the uniformity of mechanical properties and the distribution of defects such as bubbles, cavities, irregular shapes, hard impurities and density discontinuities inside explosives. The above-mentioned phenomena directly affect the safety of casting PBX launching process. Therefore, testing the size and distribution of curing stress under a certain curing process, and finding the factors that affect the size of curing stress are very important for the control of casting PBX defects. The focus of this research is how to accurately obtain the curing stress at different positions inside the casting P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/04G01L1/06
Inventor 高立龙陈春燕王晓峰南海李昆孙培培李巍席鹏李媛媛郭昕倪冰牛余雷郑亚峰王永顺
Owner XIAN MODERN CHEM RES INST
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