CFRP压力容器固化成型过程中边界条件的确定

The Determination of Boundary Condition for CFRP Pressure Vessel during Curing Process

文中应用总放热系数等效考虑了CFRP压力容器固化过程中热压釜辐射与对流边界条件。将有限元法引入瞬态热传导的反问题,根据试验测量的温度曲线,并结合最优化理论确定合理的热压釜热边界条件。结果表明:平板试验得到了总放热系数序列,其计算温度与测试温度的最大温差为0.147℃。由此,可以将得到的总放热系数序列作为CFRP压力容器固化成型过程的等效热边界条件,为其固化成型的数值模拟提供计算基础。

General heat release coefficient is used to equivalently consider autoclave radiation and convection of boundary condition during curing process for CFRP pressure vessel. To determine the reasonable heat boundary condition of autoclave, finite dement method is introduced to an inversion problem of transient heat conductivity with optimum theory and temperature curve measured in the test. The result reveals that general heat release coefficient sequence obtained in fiat plate test, and maximum temperature difference is 0.147% between calculated temperature and measured temperature. General heat release coefficient sequence is considered as equivalent heat boundary condition during curing process for CFRP pressure vessel and it provides calculated basis for the simulation of curing process.