Tailorable thermal expansion hybrid structures
Tailorable thermal expansion hybrid structures
复制标题
DOI：
10.1016/j.ijsolstr.2009.01.023
复制
发表时间：
2009-06-01
影响因子：
3.6
通讯作者：
Kerans, Ronald J.
中科院分区：
文献类型：
--
作者：
Jefferson, George;Parthasarathy, Triplicane A.;Kerans, Ronald J.
提出了一种宏观或微观结构的设计概念，该设计概念结合了具有不同热膨胀的材料，以实现与任一组分基本不同的总体有效膨胀。通过创建柔性结构来实现近零CTE和各向同性负膨胀设计，其中整体膨胀通过内部弯曲变形来补偿。这样的结构具有当经受大的热梯度时需要尺寸稳定性的应用，例如，G.太空镜在本文中，我们提出了封闭形式的分析表达式预测的有效膨胀，随之而来的内部应力，结构，以及几个有限元模拟，证明了设计性能下的非均匀热负荷。爱思唯尔有限公司出版
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.