采用无接触式电涡流位移传感系统, 对真空辅助成型工艺中预成型体的厚度变化进行了实时监测。揭示了该成型工艺过程中预成型体的厚度变化规律, 并考察了树脂过流控制时间对制件厚度与纤维体积含量的影响。结果表明, 在整个工艺过程中预成型体的厚度变化可分为三个阶段： 在树脂浸入后, 预成型体厚度迅速增加; 在树脂过流控制阶段, 预成型体厚度变化较小且保持在较高水平; 在树脂管关闭后, 预成型体厚度迅速下降并逐渐趋于稳定。制件厚度与树脂过流控制时间的变化关系类似于正弦曲线, 在树脂过流控制时间约为10 min时, 纤维体积分数最低, 较无过流控制降低1.7%; 在树脂过流控制时间约为40 min时, 纤维体积分数最高, 较无过流控制提高1.6%。
The non-contact electric eddy current displacement sensor system was applied to real-time monitor the preform thickness change throughout the vacuum assisted resin infusion (VARI) process. The compaction behavior of the preform during the VARI process was discussed. And the effect of the post-filling time on the preform thickness and the fiber volume fraction was studied. The result indicates that the compaction behavior of the preform can be divided into three stages: the preform thickness increases rapidly when the resin is infused; the perform thickness is almost not changed during the post-filling; the preform thickness decreases rapidly and drives to a stable value after that the resin-inlet is clamped. The final part thickness varies with the post-filling time, and the variation tendency is similar to a sinusoid. The fiber volume fraction is the lowest and decreases 1.7% compared with that without post-filling, when the post-filling time is about 10 min. And the fiber volume fraction is the greatest and increases 1.6% compared with that without post-filling, when the post filling time is about 40 min.
参考文献
| [1] | 赵渠森,赵攀峰.真空辅助成型工艺(VARI)研究[J].纤维复合材料,2002(1):42-46. |
| [2] | Brouwer W D, Herpt van E C F C, Labordus M. Vacuum injection moulding for large structural applications[J]. Composites, Part A.- Applied Science and Manufacturing, 2003, 34(6): 551-558. |
| [3] | 陶积柏,王绍凯,李敏,顾轶卓,张佐光,李志远.三维夹芯层连织物复合材料真空辅助成型工艺影响因素[J].复合材料学报,2010,27(4):81-86. |
| [4] | 刘相,洪晓斌,谢凯.低温固化双酚F型环氧树脂体系的化学流变模型[J].复合材料学报,2009,26(2):85-89. |
| [5] | Bender D, Schuster J, Heider D. Flow rate control during vacuum-assisted resin transfer molding (VARTM) processing [J]. Composites Science and Technology, 2006, 66(13): 2265-2271. |
| [6] | 杨金水,肖加余,曾竞成,彭超义.真空导入模塑工艺树脂流动行为研究进展[J].宇航材料工艺,20lO(1):5-8. |
| [7] | Modi D, Correia N, Johnson M, Long A, Rudd C, Robitaille F. Active control of the vacuum infusion process[J].Composites, Part A: Applied Science and Manufacturing, 2007, 38(5): 1271-1287. |
| [8] | Yenilmez B, Murat Sozer E. Compaction of E- glass fabric preforms in the vacuum infusion process, A: Characterization experiments [J].Composites, Part A: Applied Science and Manufacturing, 2009, 40(4): 499-510. |
| [9] | Williams C D, Grove S M, Summerscales J. The compression response of fibre-reinforced plastic plates during manufacture by the resin infusion under flexible tooling method[J].Composites, Part A Applied Science and Manufacturing, 1998, 29(1/2): 111-114. |
| [10] | Hammami A, Gebart B R. Analysis of the vacuum infusion molding process [J].Polymer Composites, 2000, 21(1): 28-40. |
| [11] | Modi D, Johnson M, Long A, Rudd C. Analysis of pressure profile and flow progression in the vacuum infusion process [J]. Composites Science and Technology, 2009, 69(9) : 1458- 1464. |
| [12] | Yenilmez B, Senan M, Sozer E M. Variation of part thickness and compaction pressure in vacuum infusion process[J].Composites Science and Technology, 2009, 69(11/12): 1710-1719. |
| [13] | Grimsley B W, Pascal H, Song X L, Cano R J, Loos A C, Byron P R. Flow and compaction during the vacuum assisted resin transfer moulding process[J].International SAMPE Technology Conference, 2001, 33: 140-153. |
| [14] | Dave R, Kardos J L, Dudukovic M P. A model for resin flow during composite processing: Part 1- General mathematical development [J].Polymer Composites, 1987, 8(1): 29-38. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%