固体火箭技术2017，Vol.40Issue(4)：466-470,5.DOI:10.7673/j.issn.1006-2793.2017.04.012
环境压强对NEPE推进剂单向拉伸力学行为的影响
Effect of environment pressure on the uniaxial tensile mechanical properties of NEPE solid propellants
王小英 1何铁山 1张林 1唐泉 1胡翔1
作者信息
- 1. 湖北航天化学技术研究所,襄阳 441003
- 折叠
摘要
Abstract
The mechanical properties of NEPE solid propellant were studied under the different temperature,tensile rates and environment pressure by uniaxial tensile tests.The result shows that there is a threshold value in the influence of environmental pressure on the mechanical behavior of NEPE propellant.When the value exceeds this threshold, the influence of environmental pressure on the maximum intensity is ignorable and there is no significant influence on the maximum elongation.At the same time,twin-shear strength theory was used to establish the correlation between the maximum shear stress intensity of NEPE propellant and environmental pressure.The result shows that there is a great linear relationship between them.According to the relational expression, it is obtained that the maximum shear stress intensity of the propellant is more sensitive to environmental pressure under lower temperature.Other possible applications of this relationship with a mathematical expression were also analyzed briefly.The SEM method was adopted to observe the fracture cross-sections,and it has been shown that the environmental pressure plays a greater role in the suppression of particle dewetting and hole reduction.关键词
NEPE推进F剂/力学性能/双剪强度理论/环境压强Key words
NEPE propellant/mechanical properties/twin-shear strength theory/environment pressure分类
航空航天引用本文复制引用
王小英,何铁山,张林,唐泉,胡翔..环境压强对NEPE推进剂单向拉伸力学行为的影响[J].固体火箭技术,2017,40(4):466-470,5.
