A global–local theory with stress recovery and a new post-processing technique for stress analysis of asymmetric orthotropic sandwich plates with single/dual cores

An accurate zigzag theory for bending and buckling analysis of thick laminated sandwich plates with soft core

“…Shariyat et al. 30 suggested a global-local theory with a new post-processing technique for stress analysis of asymmetric orthotropic sandwich plates with single/dual cores. Ren et al.…”

“…However, for the multilayered composite and sandwich plates, the stress smoothing technique of integrating 3D equilibrium equations must be used to obtain accurate transverse shear stresses in these models. 25–34 This approach means that the first-order derivatives of in-plane stresses will be involved in the 3D equilibrium equations. To accurately calculate transverse shear stresses by means of the equilibrium equation stress smoothing technique, the higher order elements are usually developed for the analysis of multilayered composite and sandwich plates.…”

“…By considering transverse normal strain, an improved C 0 -type global-local theory 29 was proposed for hygrothermal analysis of laminated composite plates. Shariyat et al 30 suggested a global-local theory with a new post-processing technique for stress analysis of asymmetric orthotropic sandwich plates with single/dual cores. Ren et al 31 developed a zigzag model in which the firstorder derivatives of transverse displacement have been taken out from the displacement fields.…”

“…To accurately calculate transverse shear stresses by means of the equilibrium equation stress smoothing technique, the higher order elements are usually developed for the analysis of multilayered composite and sandwich plates. 26,[30][31]33 Nevertheless, such elements contain the second-order derivatives of in-plane displacements as nodal degrees of freedom, which will decrease the computational efficiency.…”

A new approach for treating concentrated loads in doubly-curved composite deep shells with variable radii of curvature

“…As a function of the hypothesis of the theory under study the solutions can closely fit the original 3D shell or plate. In the recent literature http a huge amount of studies can be found about 2D theories for selected problems of engineering practices [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50].…”