Thermally induced phase transforming cellular lattice driven by bimetal beams
Thermally induced phase transforming cellular lattice driven by bimetal beams
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DOI：
10.1557/s43580-022-00334-y
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发表时间：
2022-09-08
期刊：
影响因子：
0.8
通讯作者：
Koizumi, Yuichiro
中科院分区：
文献类型：
--
作者：
Nagayama, Hayato;Kanegae, Sosuke;Koizumi, Yuichiro
相变胞状材料（Phase transformation Cellular Material， PXCM）在加载后发生变形，压缩后卸载后仍保持变形形状，反向变形恢复原状。传统的PXCM需要反向受力以恢复其原始形状。双金属，即热膨胀系数差异较大的金属复层板，由于热应力的作用，在温度变化时可以自发弯曲。在本研究中，我们设计了一种晶格结构，该结构不仅在施加压缩/拉伸载荷时变形，而且通过加热/冷却将双金属用于PXCM弯曲梁来改变其形状。一种新的PXCM被命名为热诱导PXCM。TI-PXCM在- 190 ~ 200℃的温度范围内具有20%以上的恢复应变，温度滞后为302 K。
Phase Transforming Cellular Material (PXCM) exhibits transformation by loading and maintains the deformed shape even after unloading after compression and restores the original shape by deforming in the opposite direction. Conventional PXCM needs to be stressed reversely to restore its original shape. Bimetals, i.e., clad sheets of metals with large differences in the coefficient of thermal expansion, can spontaneously bend in response to temperature changes because of thermal stress. In this study, we designed a lattice structure that not only deforms when a compressive/tensile load is applied but also changes its shape by heating/cooling by using bimetal for the curved beam of PXCM. A newly created PXCM is named thermally induced PXCM. The TI-PXCM exhibited a large recovery strain of 20% or more with a temperature hysteresis of 302 K in the temperature range of - 190 to 200 degrees C.