negative poisson's ratioextreme materialsmicromechanicsThis paper describes a method to design the periodic microstructure of a material to obtain prescribed constitutive properties. The microstructure is modelled as a truss or thin frame structure in 2 and 3 dimensions. The problem of finding the ...
The native Sn atoms along x direction are attracted toward the adatoms while repelled along y direction resulting in lattice distortions with a positive Poisson’s ratio. It is noticed that the adsorption of additional O atoms has little effect on the lattice distortion, see Fig. 2(e). SnO...
the signal energy plot regarding the travel distanceLis presented. A blue dashed line and a grey solid line respectively denote cases with and without a barrier. The energy decreases by the square of transmittanceTBtwice due to the barrier, and consequently, the signal energy falls even...
The density of the mixed powder was determined using the weighted average of the densities of AlSi10Mg and copper powders, and the Poisson's ratio and contact friction coefficient in the model were set to 0.3 and 0.1, respectively. The nominal stress σnom, nominal strain εnom, and Young'...
(43) C∗ijkl = ∗δijδkl + µ∗(δikδjl +δil δjk) (44) Y = 2(1 + v) (45) Yv µ= (1 + v)(1 − 2v) (46) where ( Eqs. (43) ∗) and µ(µ∗) are Lame and (44) into Eq. (37): c onstants57, v is the Poisson ratio, and δij...
negative Poisson's ratioMonte Carlo simulations in the isobaric鈥搃sothermal ensemble with variable shape of the periodic box are used to study elastic properties of two-dimensional (2D) model systems of hard discs with parallel layers of hard cyclic hexamers. Both the particles in their pure ...
Intriguingly, the strain praxis of α-CSe under zigzag deformation highlights a negative out-of-plane Poisson's ratio of 0.76 rooted in its puckered structure. Direct-to-indirect bandgap transitions and reverse transitions occurred alternatively under uniaxial and biaxial strains, which in essence ...
Incremental alterations were applied to key geometrical parameters, including the angle ( 胃 ) between connected units, the side length (a), the side width (b) of the rotating rigid unit, and the overlap distance (t). This resulted in a broad tunable range of negative Poisson's ratio ...
3g and h. This advanced technique can not only control the macroscopic shape of aerogels, but also adjust their Poisson's ratio (from negative to positive) and improve their mechanical properties. In another case, Zhang and co-workers synthesized Ag-MnO2 nanowire hybrid aerogels through ...
where\(\lambda \left({\lambda }^{*}\right)\)and\({\mu (\mu }^{*})\)are Lame constants57,\(v\)is the Poisson ratio, and\({\delta }_{ij}\)is the Kronecker delta. Inserting Eqs. (43) and (44) into Eq. (37): $${\varvec{\lambda}}{{\varvec{\delta}}}_{{\varvec{...