Comparative Analyses of Creep Models of a Solid Propellant

International Conference on Computer Information and Automation Engineering

计算机科学;运输工程

Zhang, J.B.^1,2 ; Lu, B.J.^1,2 ; Gong, S.F.^1,2 ; Zhao, S.P.^1,2

713 Research Institute of China, Shipbuilding Industry Corporation, Zhengzhou

450015, China^1

Henan Key Laboratory of Underwater Intelligent Equipment, Zhengzhou

50015, China^2

关键词: Comparative analysis;    Creep experiments;    Creep properties;    Exponential models;    Least squares fitting;    Nonlinear fitting;    Three parameters;    Viscoelastic modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/359/1/012050/pdf
DOI  :  10.1088/1757-899X/359/1/012050

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The creep experiments of a solid propellant samples under five different stresses are carried out at 293.15 K and 323.15 K. In order to express the creep properties of this solid propellant, the viscoelastic model i.e. three Parameters solid, three Parameters fluid, four Parameters solid, four Parameters fluid and exponential model are involved. On the basis of the principle of least squares fitting, and different stress of all the parameters for the models, the nonlinear fitting procedure can be used to analyze the creep properties. The study shows that the four Parameters solid model can best express the behavior of creep properties of the propellant samples. However, the three Parameters solid and exponential model cannot very well reflect the initial value of the creep process, while the modified four Parameters models are found to agree well with the acceleration characteristics of the creep process.