Experimental process pressure analysis for model-based manufacturing of composites by resin transfer moulding

13th International Conference on Textile Composites

Fauster, E.^1 ; Thirunavukkarasu, J.^1 ; Hergan, P.^1 ; Schledjewski, R.^1

Processing of Composites Group, Montanuniversitat Leoben, Otto Glöckel Str. 2/III, Leoben

8700, Austria^1

关键词: Compaction pressure;    Fibre-reinforced polymer composites;    Model-based processing;    Numerical predictions;    Process pressure;    Reinforcing materials;    Relaxation behaviors;    Transverse compactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/406/1/012060/pdf
DOI  :  10.1088/1757-899X/406/1/012060

来源: IOP

【 摘 要 】

An experimental study of the process pressure characteristics prevailing in an RTM mould during the preform impregnation stage is presented. The pressure data is analysed with respect to a superposition of preform compaction and hydraulic fluid pressure. A methodology is proposed to isolate the hydraulic fluid pressure from the preform compaction pressure involving knowledge about the compressibility behaviour of the reinforcing material. For this purpose, the preform compressibility and relaxation behavior was studied by means of transverse compaction tests on both, unsaturated as well as the saturated sample stacks. The resulting isolated hydraulic fluid pressure is finally compared with numerical predictions derived from flow simulations, revealing good overall agreement. The findings of this work will contribute to realize the concept of model-based processing of fibre-reinforced polymer composites by means of the RTM process.