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Tailorable thermal expansion hybrid structures

机译:可定制的热膨胀混合结构

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A design concept is presented for a macro or microstructure that combines materials with differing thermal expansion to achieve an overall effective expansion that differs substantially from either of the constituents. Near-zero-CTE and isotropic negative expansion designs are achieved by creating compliant structures where overall expansion is compensated by internal bending deformation. Such structures have application where dimensional stability is required when subject to large thermal gradients, e. g. space mirrors. In this paper, we present closed form analytic expressions for prediction of the effective expansion, and consequent internal stressing, of the structure, as well as several finite element simulations that demonstrate the design performance under non-uniform thermal load. Published by Elsevier Ltd.
机译:提出了一种宏观或微观结构的设计概念,该结构结合了具有不同热膨胀率的材料,以实现与两种成分中的任一种基本不同的总体有效膨胀率。接近零CTE和各向同性的负膨胀设计是通过创建顺应性结构来实现的,其中整体膨胀通过内部弯曲变形得到补偿。这样的结构在需要经受大的热梯度时需要尺寸稳定性的应用中。 G。太空镜。在本文中,我们提出了用于预测结构的有效膨胀以及随之而来的内部应力的闭合形式的解析表达式,以及一些有限元模拟,这些模拟证明了非均匀热载荷下的设计性能。由Elsevier Ltd.发布

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