Young’s modulus and Poisson’s ratio for seven-constant tetragonal crystals and nano/microtubes
Source abstract
Abstract
In the paper, the elasticity theory was applied to consider the mechanical properties of rectilinearly anisotropic seven-constant tetragonal crystals and their cylindrically anisotropic nano/microtubes with and with no chiral angle, being the angle between the crystallographic symmetry axis and elongated tube axis. Pt is found that the number of crystals with negative Poisson’s ratio is the least for rectilinear anisotropy and is much larger for curvilinear anisotropy. With a nonzero chiral angle, all nano/microtubes can have negative Poisson’s ratio. The elastic problem on axial tension of cylindrical nano/microtubes is solved for radially inhomogeneous stresses: three normal stresses and one shear stress.
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Research context
OpenAlex topics: Nonlocal and gradient elasticity in micro/nano structures · Microstructure and mechanical properties · Boron and Carbon Nanomaterials Research
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References (10)
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