Temperature-induced shape morphing of bi-metallic structures

摘要: Abstract In this work, we study the thermo-mechanical behavior of metallic structures designed to significantly change shape in response thermal stimuli. This is achieved by arranging two metals with different coefficient expansion (CTE), Aluminum and Titanium, as create displacement-amplifying units that can expand uniaxially. particular, our design comprises a low-CTE bar surrounded high-CTE frame features flexure hinges thicker links. When temperature increases, longitudinal portion geometrically constrained bar, resulting large tangential displacement. Our guided theoretical models numerical simulations. We validate approach fabricating characterizing individual units, one dimensional arrays three-dimensional structures. work shows structurally robust be for changes. The results also demonstrate how harsh environmental conditions (e.g., extreme swings are characteristic extraterrestrial environments) leveraged produce function fully passive way.