Influence rule and global sensitivity analysis of parameters during cure process of SRM composite case
- Paper number
IAC-19,C4,IP,24,x52877
- Author
Ms. Qun Liang, China, Northwestern Polytechnical University
- Coauthor
Mr. Feng Xiping, China, Northwestern Polytechnical University
- Coauthor
Mr. Li Jian, China, The 41st Institute of the Fourth Academy, China Aerospace Science and Technology Corporation (CASC)
- Coauthor
Mr. Hou Xiao, China, Northwestern Polytechnical University
- Coauthor
Ms. Du Ying, China, China Aerospace Science and Technology Corporation (CASC)
- Year
2019
- Abstract
The motor case for modern SRM is a complex compose structure with fiber reinforced resin matrix composite, EPDM insulation and metal connections, the case forming process is a multi physical-chemical process which involving heat transfer, chemical reaction and structure deformation. During the cure process, temperature determines whether the case cure completely and the uniformity of temperature field is an important factor in causing residual thermal stress and shrinkage stress, so temperature field is the key to the mutual coupling effect of each physical and chemical process, and the basis to analyze the cure process of the case. During the cure process of case, fluctuation of cure temperature, cure time or heat transfer of hot air in the furnace may occur, which make the actual forming process of case deviate from the ideal cure process. In order to investigate the sensitive degree of thermal cycle, convective heat transfer coefficient and thermal properties to cure uniformity during cure process of composite case, the influence rule of the three factors on uniformity of temperature and cure degree fields were analyzed by numerical simulation. A thermal-chemical model was built for a simplified composite SRM case firstly, and the model was verified. Then, the influence degree of the three factors on cure uniformity of composite case was analyzed and quantized by the Morris global sensitivity analysis method. The results show that the thermal cycle and the convection heat transfer coefficient have significant effect on the temperature field. lower heating rate and extend holding time can improve the uniformity of temperature field under the condition that amplifications of each sub- cycle are constant. While the heat transfer coefficient increase, the temperature of the case can be improved effectively under the same cure cycle.
- Abstract document
- Manuscript document
IAC-19,C4,IP,24,x52877.pdf (🔒 authorized access only).
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