采用真空导入模塑工艺(VIMP)制备了85 mm厚玻璃纤维增强环氧树脂层合板,单面刚性模具加热固化,沿铺层厚度方向设置热电偶,进行了实时固化温度监测,发现固化时厚度方向存在明显的温度差异.通过DSC方法得到等温环氧树脂固化度-时问实验数据,建立了基于自催化反应模型的等温固化反应动力学方程,模型计算值和实验值符合良好;提出了时间离散分步计算法,对非等温同化条件下,厚度方向的同化度分布进行了计算.结果表明:固化过程中厚度方向固化度存在差异,短时间的后同化可以消除此差异.该方法可以模拟出由温度差异导致的固化度的不均匀分布,用于指导优化同化工艺.
参考文献
| [1] | Kim H J,Hang C S.Buckling and post buckling behavior of composite laminates with a delamination[J].Composites Science and Technology,i997,57:555-564. |
| [2] | Oh J H,Lee D G.Cure cycle for thick glass/epoxy composite laminates[J].Journal of Composite Materials,2002,36(1):19-45. |
| [3] | Bogetti T A,Gillespie J W.Two-dimensional cure simulation of thick thermosetting composite[J].Journal of Composite Material,1991,25:239-273. |
| [4] | Yang Z L,Lee S.Optimized curing of thick section composite laminates[J].Materials and Manufacturing Processes,2001,16(4):541-560. |
| [5] | Li M,Zhu Q,Geubelle P H,et al.Optimal curing for thermoset matrix composites:Thermochemical consideration[J].Polymer Composites,2001,22(1):118-131. |
| [6] | Antonucci V,Giordano M,Hsiao K T,et al.A methodology to reduce thermal gradients due to the exothermic reactions in composites processing[J].International Journal of Heat and Mass Transfer,2002,45:1675-1684. |
| [7] | Mijovm J,Kim J,Slaby J.Cure kinetics of epoxy formulations of the type used in advanced composites[J].Journal of Applied Polymer Science,1984,29(4):1449-1462. |
| [8] | Jenninger W,Schawe J E K,Alig I.Calorimetric studies of isothermal curing of phase separating epoxy networks[J].Polymer,2000,41:1577-1588. |
| [9] | Bejoy F,Geert V P,Fabrice P,Gabriel G V,Rao L,Ramaswamy R,Thomas S.Cure kinetics and morphology of blends of epoxy resin with poly(ether ether ketone)containing pendant tertiary butyl groups[J].Polymer,2003,44:3687-3699. |
| [10] | Karkanas P I,Partridge I K.Cure modeling and monitoring of epoxy/amine resin systems-cure kinetics modeling[J].Journal of Applied Polymer Science,2000,77:1419-1431. |
| [11] | 郭武胜,杜善义,张博明,武湛君.厚截面树脂基复材料的温度场研究工.模拟[J].复合材料学报,2004,21(5):122-127.Guo Zhansheng,Du Shanyi,Zhang Boming,Wu Zhanjun.Study of temperature distribution of thick polymeric matrix composites(I):Simulation[J].Acta Materiae Compositae Sinica,2004,21(5):122-127. |
| [12] | 代晓青,肖加余,曾竟成,刘钧,君昌平,刘卓峰.RFI用环氧树脂固化动力学[J].复合材料学报,2008,25(4):18-23.Dai Xiaoqing,Xiao Jiayu,Zeng Jingcheng,Liu Jun,Yin Changping,Liu Zhuofeng.Curing kinetics of epoxy resin of RFI process using isothermal DSC[J].Acta Materiae Compositae Sinica,2008,25(4):18-23. |
| [13] | 徐萃薇.计算方法引论[M].北京:高等教育出版社,1985:207-220. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%