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首页> 外文期刊>Progress in Aerospace Sciences >Technological optimisation of a smart thermosetting aeronautical composite subject to fatigue bending loads
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Technological optimisation of a smart thermosetting aeronautical composite subject to fatigue bending loads

机译：智能热固性航空复合材料承受疲劳弯曲载荷的工艺优化

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A review of the published literature in the use of composites has shown the need for further guidance as to how the various manufacturing parameters should be optimised. The paper attempts to fill this gap with a description of a recent experimental investigation and the development of an optimisation procedure. The aim of the experimental program on an aeronautical specimen involving a HMF 322/34 composite was performed in order to find expressions and requirements for the optimisation procedure involving the curing cycles of its components. The physical parameters involved in the curing process and their translation in terms of thermo-chemical and mechanical properties were analysed. A thermo-mechanical test was performed. A standard method on how to predict the successive changes in the laminae stress fields and to compute the fatigue life of the laminae was used. The fatigue bending test and the Interlaminar Shear Strength test on multidirectional laminates were performed. Fatigue functions were determined. A minimum production cost optimisation procedure based on experimental relations and stochastic models was then developed. A composite with intelligent ferroelectric thin film ceramic/polymer composite bimorph sensors which can sense the defects and actuate corrective actions in order to change the direction of cracks was considered. A stochastic partial differential equation which can model the cost of the smart device was solved. A stochastic jump diffusion model was developed in order to compute the fatigue life of the composite. It is considered that this example points the way forward for a range of applications.
机译：对使用复合材料的已发表文献的回顾表明，需要就如何优化各种制造参数提供进一步的指导。本文试图通过描述最近的实验研究和开发优化程序来填补这一空白。为了找到涉及HMF 322/34复合材料的航空样品的实验程序的目的，是为了找到表达式和对涉及其组件固化周期的优化程序的要求。分析了固化过程中涉及的物理参数及其在热化学和机械性能方面的转化。进行了热机械测试。使用一种标准方法来预测层状应力场中的连续变化并计算层状疲劳寿命。对多向层压板进行了疲劳弯曲试验和层间剪切强度试验。确定疲劳功能。然后根据实验关系和随机模型开发了最低生产成本优化程序。考虑了一种具有智能铁电薄膜陶瓷/聚合物复合双压电晶片传感器的复合材料，该传感器可以检测缺陷并采取纠正措施以改变裂纹方向。解决了可以建模智能设备成本的随机偏微分方程。为了计算复合材料的疲劳寿命，建立了随机跳跃扩散模型。可以认为，该示例为一系列应用指明了前进的方向。

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