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Using Architected Materials to Enable Novel Properties

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Imagine repairing damage to your car by applying heat, or retrofitting buildings and bridges in hours instead of weeks, or deploying extra-terrestrial habitats autonomously. These ideas may seem science fiction, but they might be achievable with architected materials. Architected materials can exhibit extraordinary and unusual properties. These materials typically consist of periodic unit cells. By tailoring the features of the unit cells, we can enable novel properties like superelasticity, negative Poisson’s ratio, negative thermal expansion, and more. These special properties mean we can address grand challenges in civil engineering in new ways. In this seminar, I will describe the development of one class of architected materials known as Analogs for Shape Memory Alloys (ASMAs). I will walk through my development of a methodology for creating ASM As that exhibit temperature-induced shape recovery after large deformations, a property known as shape memory effect. During this process, the ASM As dissipate energy but remain elastic, another special property known as superelasticity. Next, inspired by the hydration-induced shape recovery of feathers, I will show how ASMA -spring systems can exhibit shape recovery. Following this, real-world applications of such materials in civil engineering and other environments will be discussed.

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Meeting ID: 846 4716 0140 Passcode: 153130

This talk is part of the Engineering Department Structures Research Seminars series.

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