the nonlocal nonlinear buckling of a double layer graphene sheet (dlgs) covered by zinc oxide (zno) piezoelectric layers is investigated in this study. the surrounding circumstances of the system are considered as a pasternak foundation including spring constants and a shear layer. graphene sheets are subjected to longitudinal magnetic field and biaxial forces. on the other hand, the zno piezoe...

Chiral liquid crystal elastomers (CLCEs) are soft photonic materials that exhibit both the characteristics of nanoscale periodic helical structures and mechanical properties rubber. Owing to its elasticity, structural color CLCEs can be tuned through deformations known as mechanochromism. Thus far, there is significant research attention exploring mechanochromism CLCEs. However, most studies ha...

introduction: the purpose of the presented study was to evaluate the effect of zirconia thickness on the tensile stress of zirconia based all-ceramic restorations. methods: twenty zirconia disks with 10mm diameter were prepared in two groups using cad/cam system. the thickness of zirconia was 0.5mm in first group and 0.3mm in second group. after sintering, 0.4mm glass ceramic porcelain was appl...

In this paper, a method to obtain correction factors for in-plane shear properties in fibre-reinforced polymers with high Poisson’s ratio under biaxial load conditions and at loads is presented. Experimental testing shows the deviations from classical laminate theory such cases. The transverse deformation general form of and, ±45° angle-ply laminate, increases strain. This effect shown exist lo...