摘要
为揭示机械载荷作用下HTPB推进剂的力学性能变化规律和破坏机理,利用单向拉伸法研究了应变率和加载方式对HTPB推进剂力学性能的影响,并基于耗散能方法分析了其在机械载荷作用下的耗散特性。结果表明,推进剂力学性能有明显的应变率相关性,抗拉强度、伸长率等与应变率的对数成线性增加关系;不同的应变控制也影响推进剂的力学性能;应变率和应变控制对推进剂试件的耗散能有较大的影响,耗散能与应变率的对数也成线性关系。
In order to understand the change of mechanical properties and damage mechanism of HTPB propellant,the influence of strain rate and loading on tensile properties of HTPB propellant was studied by means of uniaxial tension.The dissipated characteristics under mechanical loading was analyzed based on dissipated energy model.Results show that the mechanical properties and the dissipated energy of HTPB propellant were distinctly influenced by strain rate and by different control of strain.Tensile strength,elongation and dissipated energy increased linearly with the logarithm of strain rate.The results can be used as reference to research on properties of HTPB propellant in storage and use.
出处
《含能材料》
EI
CAS
CSCD
北大核心
2010年第4期377-382,共6页
Chinese Journal of Energetic Materials
关键词
固体力学
HTPB推进剂
力学性能
应力-应变
耗散能
solid mechanics
HTPB propellant
mechanical property
stress-strain
dissipated energy
