期刊
JOURNAL OF COMPOSITE MATERIALS
卷 53, 期 5, 页码 641-652出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0021998318788918
关键词
Process simulation; thermal optimization; autoclave; mold
资金
- National Natural Science Foundation of China [51375442, 51521064, 51675479]
- Ministry of Industry and Information Technology [MJZ-2015-G0-081]
- Fundamental Research Funds for the Central Universities [2017FZA4002]
In composite manufacturing, large composite parts usually exhibit high heating gradients during the autoclave process, which may intensify the process-induced residual stresses and deformations. As the thermal behavior of molds is of crucial importance to the curing performance of composites, a heat-balance method is presented to reduce the heating rate on overheated areas of molds, thus providing a more homogeneous curing process. The method is based on a local-isolation structure installed under the mold plate, which is used to change the local heat transfer coefficient of the mold. In the local-isolation structure application, an optimization process combining numerical simulations with a greedy genetic algorithm is developed to find the optimal layout and geometry of local-isolation structure in molds. The optimization results suggest that more uniform heating condition and more synchronous curing process can be achieved with the optimal design of local-isolation structure. In the case of a typical mold for C spar component, the maximum temperature difference in the composite part is reduce by 45.69%, while the maximum difference in degree of cure is decreased at a rate of 40.16%.
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