The existence of solutions is proved for unilateral dynamic contact problems of elastic von Kármán plates. Boundary conditions for a free and clamped plate are considered.

Abstract In this study, the first-order shear deformation theory (FSDT) is used to establish a nonlinear dynamic model for conical shell truncated by functionally graded graphene platelet-reinforced composite (FG-GPLRC). The vibration analyses of FG-GPLRC are presented. Considering platelets (GPLs) with three different distribution patterns, modified Halpin-Tsai calculate effective Young’s modu...

Abstract This paper presents the application of an exponential version harmonic balance method to analysis steady state vibration geometrically nonlinear systems. A detailed description and corresponding numerical procedure is provided. The von Karman theory used describe effects geometric nonlinearity. material beams modelled with help Zener model using fractional calculus. problem solved meth...

The downstroke-to-upstroke transition of many insects is characterized by rapid wing rotation. The aerodynamic consequences of these rapid changes in angle of attack have been investigated using a mechanical model dynamically scaled to the Reynolds number appropriate for the flight of small insects such as Drosophila. Several kinematic parameters of the wing flip were examined, including the sp...

This paper shows that the turbulent velocity profile for zero-pressure-gradient boundary layers is affected by the wall shear stress and convective inertia. The effect of the wall shear stress is dominant in the so-called overlap region and can be described by a logarithmic law in which the von Karman constant is about 0.4 while the additive constant depends on a Reynolds number. The effect of ...

• Without slip at the wall, alternate vortex shedding occurs behind cylinder With double cylinder. Good correlation between numerical predictions and experimental results. Vortex frequency decreases as yield stress increases or inertia Viscoelastic effects are slight. Two-dimensional unsteady inertial flows of a fluid around were studied experimentally. Carbopol aqueous gels, well-known model f...

ABSTRACT We derive a theoretical parameter for three seismic scattering regimes where wavelengths are either much shorter, similar, or longer than the correlation length of small-scale Earth heterogeneities. focus our analysis on power spectral density (PSD) von Karman autocorrelation function (ACF), used to characterize spatial heterogeneity variations elastic rock parameters that cause seismi...

This study focuses on the effects of vegetation patch density, bed condition, and incoming sediment flow structure morphology within around a patch. The variation in upstream adjustment velocity is not well defined for low-density patches but decreases with increasing density high-density patches. length region greater vegetation. Incoming causes reduction both steady wake at low density. recov...