连续纤维增强热塑性复合材料热压成型工艺研究进展

A Review on Thermo-Forming Process and Simulation Progresses of Continuous Fibre Reinforced Thermoplastic Plastics

连续纤维增强热塑性复合材料(CoFRTP)具有损伤容限高、成型周期短及可回收利用等优点,在航空航天及新能源汽车等领域能够规模化应用。热压成型工艺因其高效率、低成本的优势得到广泛的关注,但由于该工艺涉及成型参数多,以及成型过程中材料大变形、非线性、多相变等多场耦合的特点,所制构件易产生褶皱、纤维开裂及外形尺寸变形过大等质量缺陷,对构件力学性能的稳定及后期装配带来极大挑战。为克服传统试错法低效率、高成本的缺点,提高热压成型设计效率,本文重点对热压成型工艺及其相应有限元数值仿真方法进行综述。本文从CoFRTP应用现状及制造关键、热压成型工艺过程分析及研究现状和热压成型工艺仿真方法3个方面展开,最后对后续的研究工作进行展望。本文将为CoFRTP高效率和高质量成型提供理论指导,对相应的结构设计和工程应用起到推动作用。

Continuous fibre reinforced thermoplastic plastics(CoFRTP)exhibit the advantages of fast manufacturing,high fracture toughness and high recyclability,which are promising materials for aerospace and automotive industries.Thermoforming process is one of the most promising way for CoFRTP forming since the advantages of high efficiency and low cost.However,due to the amount of forming parameters involved in this process and the complex coupling of factors such as large nonlinearity deformation and multi phase transformation of materials,defects like wrinkles,fiber cracking and excessive dimensional deformation are prone to be induced,which generate great challenges to the mechanical properties of components and the assembly property.In order to overcome the disadvantages of low efficiency and high cost of traditional trial and error methods and improve the efficiency of thermoforming process design,this paper focuses on the review of thermoforming process and numerical methods.This paper includes four parts:the application and manufacturing of CoFRTP,the analysis and research status of thermoforming process,the simulation method of thermoforming process as well as the conclusion and the outlook of thermoforming technology.This study will provide theoretical guidance for highly efficient and high quality forming of CoFRTP,and promote the corresponding structural design and engineering application as well.