<p>Architected
materials are a class of materials with novel
properties that consist of numerous periodic unit cells. <a>In
past investigations, researchers have demonstrated how architected materials
can achieve these novel properties by </a><a>tailoring the features of the unit cells
without changing the bulk materials</a>. <a>Here, a group
of architected materials called Phase Transforming Cellular Materials (PXCMs)
are investigated with the goal of mimicking the novel properties of shape-memory
alloys.</a> <a>A general methodology is developed for
creating 1D PXCMs that exhibit temperature-induced reverse phase
transformations (i.e., shape memory effect) after undergoing large
deformations. During this process, the PXCMs dissipate
energy but remain elastic (i.e., superelasticity). </a>Next, inspired by
the hydration-induced shape recovery of feathers, a PXCM-spring system is developed
that uses the superelasticity of PXCMs to achieve shape recovery. Following
these successes, the use of PXCMs to resist simulated seismic demands is
evaluated. To study how they behave in a dynamic environment and how well their
response can be estimated in such an environment, a single degree of
freedom-PXCM system is subjected to a series of simulated ground motions.
Lastly, the concept of PXCMs is extended into two dimensions by creating PXCMs
that achieve superelasticity in two or more directions. Overall, the findings
of this investigation indicate that PXCMs<a>: 1) can
achieve shape memory and recovery effects through temperature changes, 2) offer
a novel alternative to traditional building materials for resisting seismic demands,
and 3) can be expanded into two dimensions while still exhibiting
superelasticity. </a></p>
<p> </p>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/11250002 |
| Date | 28 November 2019 |
| Creators | Yunlan Zhang (8045321) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/Stress-_and_Temperature-Induced_Phase_Transforming_Architected_Materials_with_Multistable_Elements/11250002 |
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