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Zou W.-W.,Nanjing University of Science and Technology | Zhou W.-L.,Nanjing University of Science and Technology | Xiao L.-Q.,Nanjing University of Science and Technology | Jian X.-X.,Nanjing University of Science and Technology | Tian S.-C.,Xian North Huian Chemical Co.
Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | Year: 2012

For the mechanical deformation of semi-combustible cartridge under upright storage, a mechanics model was established. The contact deformation of semi-combustible cartridge was calculated by 3-dimensional nonlinear finite element method theory. The distribution of stress and strain and numerical prediction of structural strength of semi-combustible cartridge were obtained. The results showed that the stress concentration occurred at the alterative area of diameter of case, when semi-combustible cartridge was upright and unloaded. The stress of intersection between the case and metal pedestal reached maximum value. The case deformation of semi-combustible cartridge was larger, but the deformation everywhere of metal pedestal closed to zero. The maximum stresses of the case and metal pedestal were far less than allowable stress of material, so the whole semi-combustible cartridge remained secure.


Yu H.-J.,Xian Modern Chemistry Research Institute | Li D.,Xian Modern Chemistry Research Institute | Zhu X.-H.,Xian North Huian Chemical Co. | Li J.-Z.,Xian Modern Chemistry Research Institute | And 5 more authors.
Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | Year: 2013

Influences of double-metal organic salts, such as PbCuDS, β-PbCu, PbCuMu, PbCuNI, BiPbGA, BiCuGA, and the mixtures of double-metal organic salts and carbon black on the combustion characteristics of GAP (S-GAP) based propellant at 2-20 MPa were experimentally studied. Results show that the burning rates of S-GAP propellant can be improved obviously by the addition of double-metal organic salts or the mixtures of double-metal organic salts and CB, and the burning pressure exponents of S-GAP propellant in the pressure range of 2-10 MPa can be reduced to lower than 0.30 by the addition of the mixtures of PbCuNI, or BiCuGA and carbon black.


Yu H.-J.,Xian Modern Chemistry Research Institute | Li J.-Z.,Xian Modern Chemistry Research Institute | Shu A.-M.,Xian North Huian Chemical Co. | Fan X.-Z.,Xian Modern Chemistry Research Institute | And 2 more authors.
Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | Year: 2013

Influences of the granularity of RDX, HMX and AP and their mixtures on the burning rate, pressure exponent and flame structure of the Stellate GAP (S-GAP) based propellant were experimentally studied by the determination of burning rate and analysis of flame structure. Results show that the combustion of S-GAP based propellant with AP is obviously more intense than the propellants with RDX or HMX. Thus, the burning rates of S-GAP based propellant with AP, especially AP with small granularity, are obviously higher than those of the propellants with RDX or HMX. The pressure exponent of S-GAP based propellant at 2-20 MPa can be decreased by the mixtures of RDX or HMX with AP in a certain extent.


Xiao L.-Q.,Nanjing University of Science and Technology | Li Y.,Nanjing University of Science and Technology | Zuo H.-L.,Nanjing University of Science and Technology | Zou W.-W.,Nanjing University of Science and Technology | And 3 more authors.
Binggong Xuebao/Acta Armamentarii | Year: 2011

A fractal pore structure model of combustible cartridge case was established by virtue of the fractal geometry. Pore structure information, such as backbone fractal dimension and percolation fractal dimension, of four kinds of combustible cartridge were obtained by mercury intrusion porosimetry (MIP) test. The formation mechanism of fractal pore structure of combustible cartridge was studied with mechanical properties. The results show that the backbone fractal dimension is formed of the space of component and influenced by the number and size of components; the percolation fractal dimension reflects the pore structure of components themselves; and the fractal dimension of pore structure is positively related to the tensile strength of combustible cartridge.


Liao L.,Northwestern Polytechnical University | Liao L.,Xian Modern Chemistry Research Institute | Pang W.,Xian Modern Chemistry Research Institute | Xu H.,Xian Modern Chemistry Research Institute | And 3 more authors.
Advanced Materials Research | Year: 2013

The physic-chemical characteristics of spherical and coarse magnesium particles were determined. The rheological properties of Mg/HTPB mixtures were investigated. The burning rate performance and mechanical properties of fuel rich propellant were evaluated. The results show that the spherical magnesium particles could be dispersed in the HTPB binder with lower viscosity and yield stress than those of the coarse ones. The burning rate and pressure exponent of propellant with spherical particles increased compared with the coarse ones, and the percent elongation is much higher than that of coarse one, whereas, the tensile strength shows reverse. © (2013) Trans Tech Publications, Switzerland.

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