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Numerical investigation of the effect of thermal gradients on curing performance of autoclaved laminates
Journal of Composite Materials ( IF 2.9 ) Pub Date : 2019-07-02 , DOI: 10.1177/0021998319859061
Qing Wang 1, 2 , Lingyun Wang 1, 2 , Weidong Zhu 1, 2 , Qiang Xu 1, 2 , Yinglin Ke 1, 2
Affiliation  

Autoclave curing process is one of the most frequently used manufacturing techniques of thermosetting composite materials. An efficient curing process requires good understanding of the thermal behavior of molds and composites during autoclave processing. In this paper, the effect of thermal gradients on curing performance of laminates is investigated through numerical approaches. In the first section, a computational fluid dynamics–finite element method numerical model is established to simulate the temperature field and the process-induced deformation of laminates. Then, a curved composite part with two different structures of mold is introduced to exhibit different temperature and degree of cure gradients during the autoclave process. Furthermore, by analyzing the position errors of measurement points, the deformation of the composite parts in different molds is evaluated. The results suggested that more synchronous curing process and less deformation of the composite part can be achieved by reducing the thermal gradients. In this specific case of a curved part, the range of position errors in X direction (the length direction) is reduced by 86.9% with the redesigned mold.

中文翻译:

热梯度对蒸压层压板固化性能影响的数值研究

高压釜固化工艺是热固性复合材料最常用的制造技术之一。有效的固化过程需要对高压釜加工过程中模具和复合材料的热行为有很好的了解。本文通过数值方法研究了热梯度对层压板固化性能的影响。在第一节中,建立了计算流体动力学-有限元法数值模型来模拟温度场和层压板的过程引起的变形。然后,引入具有两种不同模具结构的弯曲复合部件,以在高压釜过程中表现出不同的温度和固化梯度。此外,通过分析测量点的位置误差,评估复合材料零件在不同模具中的变形。结果表明,通过降低热梯度可以实现更同步的固化过程和更少的复合材料部件变形。在弯曲零件的这种特殊情况下,使用重新设计的模具,X 方向(长度方向)的位置误差范围减少了 86.9%。
更新日期:2019-07-02
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