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Thermally Driven Morphing with Hybrid Laminates and Metal Matrix Composites

机译:用杂交层压板和金属基复合材料热驱动形状

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Analytical and experimental results are presented regarding thermally-driven morphing laminated shells. Owing to exploitation of the geometric nonlinear ity of thin shells, they can demonstrate highly nonlinear displacement response to thermal loading, including multista-bility and snap-through behavior. In order to predict this behavior, an energy-based multi-stability model is proposed which utilizes experimentally-measured 1D thermally-induced curvatures as input parameters to determine the shell's 2D flexural behavior. Experiments are conducted to measure the 1D curvatures in both hybrid CFRP-metal laminates, as well as high-temperature capable SiC/Ti metal matrix composites. Data from these experiments is used to predict the geometrically nonlinear response of thermally loaded shells, and results are compared with experiment using 3D digital image correlation. The potential impact of this research is the realization of thermal and fluid control devices capable of operating autonomously in extreme environments such as gas turbine engine cores.
机译:分析和实验结果提出了热驱动的变形层压壳。由于利用薄壳的几何非线性Ity,它们可以证明对热负荷的高度非线性位移响应,包括多级合体和快速行为。为了预测这种行为,提出了一种基于能量的多稳定模型,其利用实验测量的1D热诱导曲率作为输入参数,以确定壳的2D弯曲行为。进行实验以测量杂交CFRP-金属层压板中的1D曲率,以及高温的SiC / Ti金属基复合材料。来自这些实验的数据用于预测热负载壳的几何非线性响应,并使用3D数字图像相关的实验进行比较结果。该研究的潜在影响是实现能够在燃气涡轮发动机芯等极端环境中自主运行的热和流体控制装置的实现。

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