关键词: 复合材料, 热压罐, 框架式, 热分布, 变形

Abstract: In this paper, the thermal distribution and deformation simulation of typical frame tooling for composite autoclave molding are carried out. The analysis results show that: Due to the role of circulating gas in the autoclave, there are windward and leeward sides in the autoclave, and the temperature of windward side first rises. During the heating process, the temperature difference of the tooling increases continuously. When the temperature rise stage ends, the temperature difference of the tooling reaches to the maximum state. In order to reduce the temperature difference in the tooling, an insulation platform can be added. For the tooling with complex frame structure, there are differences between the actual heat distribution results and the empirical cognition, the leading and lagging regions are not distributed in the head and tail area of the tank. Taking the temperature results as boundary conditions, it can be obtained that: Due to the existence of temperature gradient in autoclave, the thermal expansion deformation of tooling occurs. The maximum deformation is basically located at four corners, and the maximum deformation is about 0.9 mm, which is mainly due to the small thermal expansion coefficient of Invar steel. In actual manufacturing, it is a good choice to choose Invar steel as the mould material, which can effectively reduce the curing deformation of the composite during the curing process.

Key words: composite material; autoclave; frame type; heat distribution; deformation