The problem of vibrations thin, hereditarily deformable shell elements moving in a gas under the action atmospheric turbulence is considered. work aims to study flutter phenomenon aircraft flow loads caused by turbulence. Assuming that relationship between stresses and strains for material linear-hereditary, thin used, which obeys Kirchhoff-Love hypothesis. aerodynamic force written according l...

The multichannel scattering theory is applied to the (2,2) sector of the (non-static) Lee model. Rigorous expressions for the transit ion amplitudes for two-fragments channels are derived. These expressions contain al l effects of off-shell renormalizat ion in a complete and consistent way. W i t h suitable identification of the elementary fields of the model the reactions considered correspond...

We study the lubrication of fluid-immersed soft interfaces and show that elastic deformation couples tangential and normal forces and thus generates lift. We consider materials that deform easily, due to either geometry e.g., a shell or constitutive properties e.g., a gel or a rubber , so that the effects of pressure and temperature on the fluid properties may be neglected. Four different syste...

We explore an acoustic scattering cancellation shell for buoyant hollow cylinders submersed in a water background. A thin, low-shear, elastic coating is used to cancel the monopole scattering from an air-filled, neutrally buoyant steel shell for all frequencies where the wavelength is larger than the object diameter. By design, the uncoated shell also has an effective density close to the aqueo...

Complex thin-plate structures such as ships and bridges are welded together with numerous thin plates stiffeners. Thermal elastic-plastic analysis based on the finite element method is a fundamental tool for predicting welding deformations residual stresses in large steel structures. The shell-solid coupling can improve scale efficiency compared to solid method. This study aims introduce into m...

The influence of arbitrary edge loads on the stresses and deformations of thin, elastic shells with general boundaries is studied by means of asymptotic expansions of a general tensor equation. Expansions are made in terms of an exponential or an Airy function and a series in powers of a small-thickness parameter. Most of the steps in the procedure are effected by using the dyadic form of the t...

We perform a hybrid experimental and numerical study of the localization of deformation in thin spherical elastic shells under indentation. Past a critical indentation, the deformation of the shell ceases to be axisymmetric and sharp points of localized curvature form. In plates, these sharp points are known as d-cones. By way of analogy, regions of localization in shells are referred to as s-c...