He Jiayang, Zhan Lihua, Yang Youliang, Xu Yongqian
Light Alloys Research Institute, Central South University, Changsha 410083, China.
Department of Energy and Electrical Engineering, Hunan University of Humanities, Science and Technology, Loudi 417000, China.
Polymers (Basel). 2024 Mar 5;16(5):705. doi: 10.3390/polym16050705.
During the process of forming carbon fiber reinforced plastics (CFRP) in an autoclave, deeply understanding the global sensitivity of factors influencing mold surface temperature is of paramount importance for optimizing large frame-type mold thermally and enhancing curing quality. In this study, the convective heat transfer coefficient (CHTC), the thickness of composite laminates (TCL), the thickness of mold facesheet (TMF), the mold material type (MMT), and the thickness of the auxiliary materials layer (TAL) have been quantitatively assessed for the effects on the mold surface temperature. This assessment was conducted by building the thermal-chemical curing model of composite laminates and utilizing the Sobol global sensitivity analysis (GSA) method. Additionally, the interactions among these factors were investigated to gain a comprehensive understanding of their combined effects. The results show that the sensitivity order of these factors is as follows: CHTC > MMT > TMF > TCL > TAL. Moreover, CHTC, MMT, and TMF are the main factors influencing mold surface temperature, as the sum of their first-order sensitivity indices accounts for over 97.3%. The influence of a single factor is more significant than that of the interaction between factors since the sum of the first-order sensitivity indices of the factors is more than 78.1%. This study will support the development of science-based guidelines for the thermal design of molds and associated heating equipment design.
在高压釜中制造碳纤维增强塑料（CFRP）的过程中，深入了解影响模具表面温度的因素的全局敏感性对于优化大型框架式模具的热性能和提高固化质量至关重要。在本研究中，对流换热系数（CHTC）、复合层压板厚度（TCL）、模具面板厚度（TMF）、模具材料类型（MMT）和辅助材料层厚度（TAL）对模具表面温度的影响已得到定量评估。该评估通过建立复合层压板的热化学固化模型并利用Sobol全局敏感性分析（GSA）方法进行。此外，还研究了这些因素之间的相互作用，以全面了解它们的综合影响。结果表明，这些因素的敏感性顺序如下：CHTC＞MMT＞TMF＞TCL＞TAL。此外，CHTC、MMT和TMF是影响模具表面温度的主要因素，因为它们的一阶敏感性指数之和超过97.3%。由于各因素一阶敏感性指数之和超过78.1%，单个因素的影响比因素之间的相互作用更显著。本研究将为模具热设计及相关加热设备设计的科学指导方针的制定提供支持。
