在复合材料固化过程中,固化度场的非均匀性是引起残余热应力和固化收缩应力的重要因素.为了探讨树脂基复合材料结构件固化成型过程中的工艺参数对固化均匀性的影响,首先针对Epon 862/W环氧树脂体系建立了复合材料固化仿真模型,并对模型进行了验证;然后,通过因次分析得出了树脂基复合材料结构件的热传递方程和固化动力学方程的无因次形式;最后,通过数值模拟定量分析了固化工艺温度、对流换热系数和结构件厚度对复合材料固化均匀性的影响规律.结果表明:在等温固化条件下,对流换热系数对复合材料固化均匀性的影响很小,无因次式特征时间tc/树脂固化反应特征时间tR与固化度差值间存在拟合函数关系,该函数可以方便地用于工程计算.
参考文献
| [1] | Tavakol, B.;Roozbehjavan, P.;Ahmed, A.;Das, R.;Joven, R.;Koushyar, H.;Rodriguez, A.;Minaie, B..Prediction of residual stresses and distortion in carbon fiber-epoxy composite parts due to curing process using finite element analysis[J].Journal of Applied Polymer Science,20132(2):941-950. |
| [2] | 张纪奎;关志东;郦正能.热固性复合材料固化过程中温度场的三维有限元分析[J].复合材料学报,2006(2):175-179. |
| [3] | 张纪奎;郦正能;关志东;程小全.固化度与固化收缩对非对称复合材料层合板固化变形的影响[J].复合材料学报,2007(2):120-124. |
| [4] | Gasser F. Abdelal;Antony Robotham;Wesley Cantwell.Autoclave cure simulation of composite structures applying implicit and explicit FE techniques[J].International journal of mechanics and materials in design,20131(1):55-63. |
| [5] | 王晓霞 .热固性树脂基复合材料的固化变形数值模拟[D].山东大学,2012. |
| [6] | 王晓霞;王成国;贾玉玺;罗玲.热固性树脂固化动力学模型简化的新方法[J].材料工程,2012(6):67-70. |
| [7] | N. Silikas;G. Eliades;D.C. Watts.Light intensity effects on resin-composite degree of conversion and shrinkage strain[J].Dental materials,20004(4):292-296. |
| [8] | Yan XQ.Finite element modeling of curing of epoxy matrix composites[J].Journal of Applied Polymer Science,20074(4):2310-2319. |
| [9] | J. Magnus Svanberg;J. Anders Holmberg.Prediction of shape distortions Part I. FE-implementation of a path dependent constitutive model[J].Composites, Part A. Applied science and manufacturing,20046(6):711-721. |
| [10] | A. Cheung;Y. Yu;K. Pochiraju.Three-dimensional finite element simulation of curing of polymer composites[J].Finite elements in analysis & design,20048(8):895-912. |
| [11] | Daniel J.O'Brien;Scott R.White.Cure kinetics,gelation,and glass transition of a bisphenol F epoxide[J].Polymer engineering and science,20034(4):863-874. |
| [12] | Dionysis E. Mouzakis;Helen Zoga;Costas Galiotis.Accelerated environmental ageing study of polyester/glass fiber reinforced composites (GFRPCs)[J].Composites, Part B. Engineering,20083(3):467-475. |
| [13] | Sabyasachi Ganguli;Ajit K.Roy;David P.Anderson.Improved thermal conductivity for chemically functionalized exfoliated graphite/epoxy composites[J].Carbon: An International Journal Sponsored by the American Carbon Society,20085(5):806-817. |
| [14] | 张纪奎;张江;马志阳;程小全.厚截面层合板非同步固化的三维有限元分析[J].北京航空航天大学学报,2013(11):1464-1469. |
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