The design, construction and operation of buildings under conditions technogenic impact caused by mining represents a system complex knowledge-intensive tasks. As part research in this direction, it is required to solve the problems mathematical modeling interaction between structure soil mass zone undermined territories, as well verifying numerical solutions comparison with data monitoring str...

the available shear correction factors have mainly been developed for homogeneous isotropic plates and/or assuming that no shear tractions are imposed on the top and bottom surfaces of the plate. in the present research, a more general case of a circular functionally graded plate subjected to non-uniform normal and shear tractions at the top and bottom surfaces is considered. these non-uniform ...

the aim of the paper is to analyze electro-thermo nonlinear vibration of a double-piezoelectric composite microplate-system (dpcmps) based on nonlocal piezoelasticity theory. the two microplates are assumed to be connected by an enclosing elastic medium which is simulated by pasternak foundation. both of smart composite microplates are made of poly-vinylidene fluoride (pvdf) reinforced by zigza...

Given an instance I of a minimization problem with optimum opt, fixed parameter ρ(k) inapproximability is to find a k ≥ opt and prove that it is not possible to compute a solution of value ρ(k) · k. In this paper all proofs are under the eth. In this paper all ratios are larger than 1. An (r, t)-FPT-hardness (in opt) for two functions r, t, is showing that the problem admits no r(opt) approxima...

Under the influence of axial forces and uniform temperature variations, thermal buckling postbuckling composite beams reinforced functionally graded multilayer graphene platelets (GPLs) resting on nonlinear elastic foundations are examined. The Halpin-Tsai model is used to calculate modulus each layer GPL-reinforced (GPLRC). According virtual work principle, governing equations for beam obtaine...

Abstract The paper uses the modified couple stress theory to study free vibration model of bimodular microbeams with an elastic foundation. Microbeams behave differently in tension and compression zones due property, neutral layer depends on sign bending moment. By figuring out effective strain formula applying Hamilton’s principle, governing equation for can then be derived. takes into account...

The buckling behavior of functionally graded carbon nanotube-reinforced composite (FG-CNTRC) plates resting on Winkler-Pasternak elastic foundations under in-plane loads for various temperatures is investigated using element-free Galerkin (EFG) method based on first-order shear deformation theory (FSDT). The modified shear correction factor is used based on energy equivalence principle. Carbon ...