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Abstract
This work measured the internal pressure strengths of a periodic shell architecture, named Shellular, made of Ni-P, Cu, and silica. For this purpose, a simple and effective test method was applied. The results were analyzed using elementary mechanics and finite element analyses. The critical pressures of the most ductile Shellular specimens, made of Cu, were the highest among them, despite the low strength of Cu. Although the specimens had substantial geometrical imperfections and were made of thin shells of a micrometer, the strengths of Cu Shellulars under internal pressure were comparable to that of a conventional cylindrical pressure vessel.
Highlights
Han et al.2 fabricated P-surface-like Shellulars by forming a polymer template based on 3D lithography, called a selfpropagating polymer wave guide (SPPW),5 and coating a hard metal onto the surface, followed by etching out the template
Al-Keten et al.10 reported that Shellulars with density higher than 10-2 g/cc revealed a stretchingdominated deformation and the higher mechanical properties than truss-like micro-architectured materials, too
Scitation.org/journal/adv one sub-volume carrying oxygen and nutrients should be able to endure a higher internal pressure than the other subvolume
Summary
Han et al.2 fabricated P-surface-like Shellulars by forming a polymer template based on 3D lithography, called a selfpropagating polymer wave guide (SPPW),5 and coating a hard metal onto the surface, followed by etching out the template. Using specimens scitation.org/journal/adv made of three different constituent materials, Ni-P, Cu, and silica, the effects of the ductility and brittleness on the failure behavior were investigated.
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