论文部分内容阅读
对复合固体推进剂进行不同应力幅值条件下的往复拉伸试验,找出加载过程中往复拉伸曲线、特征应变以及耗散能的变化规律,以分析定应力幅值往复拉伸过程中推进剂的损伤特性。结果表明:往复拉伸过程中耗散能的变化反映了推进剂在不同拉伸应变下损伤形式不同,往复过程中的耗散能主要由基体的粘性耗散与破坏提供,应力幅值与往复拉伸寿命的对数之间线性相关性良好。
The composite solid propellant was subjected to reciprocating tensile test under different stress amplitudes to find out the change rule of the reciprocating tensile curve, the characteristic strain and the dissipative energy in the process of loading, Damage characteristics of the agent. The results show that the change of dissipative energy in the process of reciprocating drawing reflects the different damage forms of the propellant under different tensile strains. The dissipative energy during the reciprocating process is mainly provided by the viscous dissipation and failure of the matrix. The stress amplitude and reciprocation The linear correlation between the logarithms of tensile life is good.