热边界条件对复合材料层合板固化过程的影响
|
摘要
为了降低热固性树脂基复合材料在热补仪加热固化过程中的峰值温度以及优化其温度场分布,提出了在复合材料层合板上表面分别采用定温、对流换热边界条件和在层合板上表面放置铝制模具三种基于热边界条件的优化方法。通过有限元方法计算了上述三种情况下层合板的温度场和固化度场,并和已有方法做了对比。计算结果表明:相较于已有方法,采用以上优化方法均可以降低层合板的峰值温度并改善其温度场分布;层合板上表面定温时,其峰值温度降低最多;上表面对流换热时,峰值温度降低最少;上表面放置铝制模具时,铝的增强导热性能可以使层合板在平行于模具平面内的温度梯度较为均匀。
In order to reduce peak temperature of the thermosetting resin matrix composites and optimize the temperature field distribution during the process of curing based on hot bonder,three optimization methods of thermal conditions are proposed,i.e.,isothermal boundary conditions,convective heat transfer boundary conditions and a aluminum mould are set respectively on the top surface of laminated plate. The degree of cure and temperature field distribution above three conditions are calculated by the finite element method,and compared with traditional method. The calculation results show that compared with existing methods,the optimization method can reduce the peak of temperature and optimize the temperature field distribution of laminated plates. The peak temperature drops the most on isothermal boundary conditions,while it drops the least on convective heat transfer boundary conditions.The temperature gradient of laminated plates in parallel to the mold surface is relatively uniform with good thermal conductivity of aluminum when aluminum mold are set on the top surface of laminated plate.
In order to reduce peak temperature of the thermosetting resin matrix composites and optimize the temperature field distribution during the process of curing based on hot bonder,three optimization methods of thermal conditions are proposed,i.e.,isothermal boundary conditions,convective heat transfer boundary conditions and a aluminum mould are set respectively on the top surface of laminated plate. The degree of cure and temperature field distribution above three conditions are calculated by the finite element method,and compared with traditional method. The calculation results show that compared with existing methods,the optimization method can reduce the peak of temperature and optimize the temperature field distribution of laminated plates. The peak temperature drops the most on isothermal boundary conditions,while it drops the least on convective heat transfer boundary conditions.The temperature gradient of laminated plates in parallel to the mold surface is relatively uniform with good thermal conductivity of aluminum when aluminum mold are set on the top surface of laminated plate.
引文
[1]Esposito L,Sorrentino L,Penta F,et al.Effect of curing overheating on interlaminar shear strength and its modelling in thick FRP laminates[J].International Journal of Advanced Manufacturing Technology,2016,5-8(5-8):1-8.
[2]Prathyush.Process optimization of composite flex beams using neural networks[D].London:Imperial College,2013.
[3]邢丽英,中航工业科技与信息化部.先进树脂基复合材料自动化制造技术[M].北京:航空工业出版社,2014.
[4]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:山东大学,2012.
[5]Sorrentino L,Polini W,Bellini C.To design the cure process of thick composite parts:experimental and numerical results[J].Advanced Composite Materials,2014,23(3):225-238.
[6]李君,姚学锋,刘应华,等.复合材料固化过程中温度及应变场分布的解析解[J].清华大学学报:自然科学版,2009(5):767-771.
[7]White S R,Hahn H T.Cure cycle optimization for the reduction of processing-induced residual stresses in composite materials[J].Journal of Composite Materials,1993,27(14):1352-1378.
[8]Qiao M,You B,Xu J,et al.Analysis of the influence of the mold on a thick thermoset composite flange during curing[J].International Journal of Advanced Manufacturing Technology,2015,78(1-4):603-612.
[9]Shevtsov S,Zhilyaev I,Soloviev A,et al.Optimization of the composite cure process based on the thermo-kinetic model[J].Advanced Materials Research,2012,569(6):185-192.
[10]Vafayan M,Ghoreishy M H R,Abedini H,et al.Development of an optimized thermal cure cycle for a complex-shape composite part using a coupled finite element/genetic algorithm technique[J].Iranian Polymer Journal,2015,24(6):459-469.
[11]彭亮,毛伟,赵美英.复合材料层合板结构固化过程数值分析方法研究[J].西北工业大学学报,2015(6):900-905.
[12]王俊敏,郑志镇,陈荣创,等.树脂基复合材料固化过程固化度场和温度场的均匀性优化[J].工程塑料应用,2015(4):55-61.
[13]李世林,陈淑仙,田秋实,等.升温速率对复合材料修补片固化过程热应力的影响[J].玻璃钢/复合材料,2018(2):58-65.
[14]罗立,唐庆如.玻璃纤维对环氧基体预浸料固化特征的影响研究[J].玻璃钢/复合材料,2014(4):13-17.
[15]元振毅,王永军,张跃,等.基于材料性能时变特性的复合材料固化过程多场耦合数值模拟[J].复合材料学报,2015,32(1):167-175.
[16]陈淑仙,田鹤,秦文峰,等.树脂基复合材料固化过程中的温度和热应力场三维瞬态分析[J].电子科技大学学报,2014,43(4):547-551.
[17]阎勇,庄茁,周正刚,等.树脂比热容对复合材料固化过程数值模拟的影响[J].航空材料学报,2006,26(2):37-40.
[18]杨世铭,陶文铨.传热学第三版[M].北京:高等教育出版社,1998.
[19]罗河胜.塑料材料手册[M].广州:广东科技出版社,2010.
[2]Prathyush.Process optimization of composite flex beams using neural networks[D].London:Imperial College,2013.
[3]邢丽英,中航工业科技与信息化部.先进树脂基复合材料自动化制造技术[M].北京:航空工业出版社,2014.
[4]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:山东大学,2012.
[5]Sorrentino L,Polini W,Bellini C.To design the cure process of thick composite parts:experimental and numerical results[J].Advanced Composite Materials,2014,23(3):225-238.
[6]李君,姚学锋,刘应华,等.复合材料固化过程中温度及应变场分布的解析解[J].清华大学学报:自然科学版,2009(5):767-771.
[7]White S R,Hahn H T.Cure cycle optimization for the reduction of processing-induced residual stresses in composite materials[J].Journal of Composite Materials,1993,27(14):1352-1378.
[8]Qiao M,You B,Xu J,et al.Analysis of the influence of the mold on a thick thermoset composite flange during curing[J].International Journal of Advanced Manufacturing Technology,2015,78(1-4):603-612.
[9]Shevtsov S,Zhilyaev I,Soloviev A,et al.Optimization of the composite cure process based on the thermo-kinetic model[J].Advanced Materials Research,2012,569(6):185-192.
[10]Vafayan M,Ghoreishy M H R,Abedini H,et al.Development of an optimized thermal cure cycle for a complex-shape composite part using a coupled finite element/genetic algorithm technique[J].Iranian Polymer Journal,2015,24(6):459-469.
[11]彭亮,毛伟,赵美英.复合材料层合板结构固化过程数值分析方法研究[J].西北工业大学学报,2015(6):900-905.
[12]王俊敏,郑志镇,陈荣创,等.树脂基复合材料固化过程固化度场和温度场的均匀性优化[J].工程塑料应用,2015(4):55-61.
[13]李世林,陈淑仙,田秋实,等.升温速率对复合材料修补片固化过程热应力的影响[J].玻璃钢/复合材料,2018(2):58-65.
[14]罗立,唐庆如.玻璃纤维对环氧基体预浸料固化特征的影响研究[J].玻璃钢/复合材料,2014(4):13-17.
[15]元振毅,王永军,张跃,等.基于材料性能时变特性的复合材料固化过程多场耦合数值模拟[J].复合材料学报,2015,32(1):167-175.
[16]陈淑仙,田鹤,秦文峰,等.树脂基复合材料固化过程中的温度和热应力场三维瞬态分析[J].电子科技大学学报,2014,43(4):547-551.
[17]阎勇,庄茁,周正刚,等.树脂比热容对复合材料固化过程数值模拟的影响[J].航空材料学报,2006,26(2):37-40.
[18]杨世铭,陶文铨.传热学第三版[M].北京:高等教育出版社,1998.
[19]罗河胜.塑料材料手册[M].广州:广东科技出版社,2010.