树脂基复合材料内外协同固化工艺仿真与分析

RESIN MATRIX COMPOSITES SIMULATION AND ANALYSIS OF INTERNAL-EXTERNAL COORDINATION CURING

在采用传统内固化工艺对厚壁壳体成型时,内层温度往往不足以满足其固化要求或者加热时间过长,因此通常采用多次缠绕多次固化的成型工艺,耗能高、效率低,不但大大提高了成本,也难以保证产品质量。因此本文提出了内外协同固化新工艺并介绍其原理,建立纤维树脂复合材料厚壁壳体内外协同固化过程的传热模型和固化动力学模型,通过有限元软件ANSYS和APDL语言开发内外协同固化过程数值模拟程序,实现了厚壁壳体内外协同固化过程中温度和固化度的分布及其变化规律的数值模拟研究。对新工艺的数值模拟结果表明,随着外温和预热温度的不断增大,中心节点的温度、固化度和应变波动较大;厚壁壳体内外协同固化的时间很短,是传统固化时间的1/3。

In the traditional curing process of thick-walled shell winding,the inner temperature is often not enough to meet the requirement of its curing or time is too long,so it usually adopt molding process of many winding and much curing,high energy,low efficiency,which not only has greatly increased the cost,and as a result of layered of curing resin cross-linking,so difficult to guarantee the quality of the product. So the new internal-external coordination curing process is advanced in this paper and its principles are introduced. Two mathematical models including heat conduction model and cure kinetics model of fiber composite thick-walled shell of the internal-external coordination curing process are built. The finite element software ANSYS and APDL language are used to develop numerical simulation procedure of the process,the numerical simulation program of the internal-external coordination curing process is developed to study the distribution and the variation of temperature and curing degree. The numerical simulation of the new process shows that with external heating source temperature and preheating temperature,changing curve of temperature,curing and strain of center node is increased,and walled housing internal-external coordination curing time is shorted to 1 /3 of the curing time of traditional method.