为了消除热压成型过程中的气泡,初步研究了气泡从织物层中穿出的形态变化过程,从压力的角度分析了气泡穿出的驱动力,同时探讨了外加压力、树脂粘度、气泡大小、网格面积以及铺层层数等对气泡穿出行为的影响.研究结果表明,气泡主要随着树脂的流动而从织物中穿出的;对于同一大小的气泡,树脂粘度越低、铺层层数越少、网格面积越大,气泡穿出所需的外加临界压力越小;当树脂粘度和外加压力一定时,大气泡比小气泡更容易从织物中穿出.该研究结果为热压成型过程中气泡运动模型的建立提供了实验依据.
参考文献
| [1] | Berglund L A, Varna J, Joffe R. Effect of voids on failure mechanisms in RTM laminates [J]. Composites Science and Technology, 1995, 53(2): 241-249. |
| [2] | Boey F Y C, Lye S W. Void reduction in autoclave processing of thermo-set composites (1) : Void reduction in microwave curing process [J]. Composites, 1992, 23(4): 266-270. |
| [3] | Harber B D, Stab G H. Note on the effects of voids upon the hygral and mechanical properties of AS4/3502 graphite epoxy [J]. Journal o f Composites Material, 1987, 21(3): 280-288. |
| [4] | Kohn E J, Sands A C, Clark R C. Quantitative measurement of void content in class-filament-wound composites and corre lation of inter-laminar shear strength with void content [J].Ind Eng Chem Prod Res De , 1968, 7: 179-183. |
| [5] | Hu J L, Liu Y, Shao X M. Study on void formation in multilayer woven fabrics [J]. Composites Part A : Applied Science and Manufacturing, 2004, 35(5): 595-603. |
| [6] | Wood J R, Bader M G. Void control for polymer-matrix composites (1) : Theoretical and experimental methods for determining the growth and collapse of gas bubbles [J]. Composites Manufacturing, 1994, 5(3): 139-147. |
| [7] | Wood J R, Bader M G. Void control for polymer-matrix composites (1): Experimental evaluation of a diffusion model for the growth and collapse of gas bubbles [J]. Composites Manufacturing, 1994, 5(3): 149-158. |
| [8] | Kardos J L, Dav E R, Dudukovic M P. Voids in composites [A]. In: Proceedings of manufacturing International '88[C]. Atlanta: ASME, the Council on Engineering, 1988.41-48. |
| [9] | 郭荣良,郭清南,祝世兴.流体力学及应用[M].北京:机械工业出版社,1996. |
| [10] | 刘应中,缪国平.高等流体力学[M].上海:上海交通大学出版社,2000. |
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