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本文通过对复合推进剂中裂缝增长数据进行分析,来研究裂缝增长数据的统計规律。在给定的裂缝长度下,对裂缝增长率和应力强度因子的测量结果进行了统計分析,以确定测量值的统計规律。在两个不同裂缝长度下,对裂缝增长率和应力强度因子相互关系进行了分析。此外,在分析裂缝增长率和应力强度因子的相互关系是,建立了三种回归模型。对建立回归模型所用的假设及这些模型用于预示的情况进行了讨论。
In this paper, the crack growth data in composite propellants are analyzed to study the statistical rules of crack growth data. Under the given crack length, the statistical analysis of the measurement results of crack growth rate and stress intensity factor were carried out to determine the statistical rule of the measured values. At two different crack lengths, the relationship between crack growth rate and stress intensity factor was analyzed. In addition, in analyzing the relationship between crack growth rate and stress intensity factor, three regression models are established. The assumptions used to establish the regression model and the scenarios in which these models are used to predict are discussed.