Cure simulation with resistively in situ heated CFRP molds: Implementation and validation
Cure simulation with resistively in situ heated CFRP molds: Implementation and validation
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DOI：
10.1016/j.compositesa.2015.10.020
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发表时间：
2016
影响因子：
8.7
通讯作者：
J. Weiland;M. Hartmann;R. Hinterhölzl
中科院分区：
文献类型：
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作者：
J. Weiland;M. Hartmann;R. Hinterhölzl
在具有不同横截面的部件的复合材料加工中，寻求均匀固化，但提出了重大挑战。用于树脂传递模塑（RTM）工艺的电加热模具提供了局部引入热量的可能性，从而实现更均匀的固化并提高零件质量。然而，CFRP的低导电性造成不受控制的放热反应的风险。针对这一潜力，在这项研究中提出了一个适当的和有效的数值方法来模拟电阻加热CFRP模具的部分固化。开发了一种三维有限元固化数值模拟的数控算法，该算法利用温度边界条件的反应通量来计算产生的刀具温度场。这种方法的能力，以预测非均匀的工具温度的自加热CFRP模具接近热电偶的精度在固化过程中示出的数值验证和实验验证的装置上的自加热CFRP板。
In composite processing of parts with varying cross-sections, homogeneous cure is sought but poses a significant challenge. Electrically heated molds for resin transfer molding (RTM) processes offer the potential to locally introduce heat and, thus, achieve more homogeneous cure and enhanced part quality. However, low conductivity of CFRP poses a risk of uncontrolled exothermic reactions. To target this potential, an appropriate and efficient numerical method is presented in this study to simulate part cure governed by resistive heated CFRP molds. A numerical control algorithm for 3D finite element cure simulations is developed, which uses the reaction flux of a temperature boundary condition to calculate the arising tool temperature field. The capability of this method to predict non-uniform tool temperatures of self-heated CFRP molds with close to thermocouple accuracy during the cure process is shown by means of numerical verification and experimental validation on a self-heated CFRP plate.