A test method for high and low temperature compression response of strain rate in modified double base propellant
A double-base propellant and response testing technology, which is applied in the direction of applying stable tension/pressure to test material strength, measuring devices, and strength characteristics, can solve problems such as the inability to achieve propellant strain rate levels, and achieve mechanical test accuracy. , One-way time consumption is short, and the effect of ensuring safety and stability
Active Publication Date: 2020-10-02
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem that the existing technology cannot realize the high strain rate level in the propellant and the mechanical performance test under low temperature conditions, and provide a high and low temperature compression response test method for the strain rate in the modified double-base propellant
Method used
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Embodiment 2
[0062] According to the test process of the above-mentioned Example 1, the temperature is set to 20°C in steps 1, 4 and 5, and the rest of the steps are the same, and it can be obtained Figure 8 The test results shown.
Embodiment 3
[0064] According to the test process of the above-mentioned Example 1, the temperature is set to -10°C in steps 1, 4 and 5, and the rest of the steps are the same, you can get Figure 9 The test results shown.
Embodiment 4
[0066] According to the test process of the above-mentioned Example 1, the temperature is set to -25°C in steps 1, 4 and 5, and the rest of the steps are the same, you can get Figure 10 The test results shown.
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The invention relates to a high and low temperature compression response test method for the medium strain rate of a modified double base propellant, and concretely relates to a high-precision test method for the compression stress strain response of the medium strain rate level of a modified double base propellant under high and low temperature conditions. The method is based on a high-speed hydraulic servo test system, an in-situ heat insulation device meeting medium-strain strain test demands is designed, and a programmable constant temperature test machine is combined to realize compression mechanical test of the medium strain rate level of the modified double base propellant under different temperature conditions in order to obtain a stress-strain curve of the modified double base propellant. The obtained stress-strain curve can be applied to the establishment of a rate dependent constitutive model, considering the temperature condition, of the modified double base propellant, andthe model can be applied to the finite element simulation to realize charge mechanical response prediction and solve the engineering problems in the field of the relevant applications of the modifieddouble base propellant.
Description
technical field [0001] The invention relates to a method for testing the strain rate high-low temperature compression response in a modified double-base propellant, in particular to a high-precision test method for the strain rate level compressive stress-strain response in a modified double-base propellant under high and low temperature conditions. Background technique [0002] Modified double-base propellant charges are widely used in gun-launched missile engines, and the deformation of propellant charges reaches the level of medium strain rate (1-100 / s) under the condition of high axial launch overload. At the same time, artillery-launched missiles may withstand harsh temperature conditions of -40 to 50°C during transportation and use, and the mechanical properties of the propellant will change under different temperature environments, seriously affecting its anti-overload capability. In the anti-overload design of the charge, it is necessary to establish a constitutive m...
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IPC IPC(8): G01N3/18
CPCG01N3/18G01N2203/0075
Inventor 白龙谢侃隋欣周海霞李月洁王宁飞
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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