An analytical model is developed to deduce the elastic and plastic properties of a hemispherical inclusion embedded in surface semi-infinite solid from its indentation response. The differs approaches presented literature by starting expressions for elasto-plastic responses homogeneous solids, adapting them replacing modulus an effective inclusion. accuracy established comparing results with de...

Inverse kinematics solutions for multi-DOF arms can be classified as analytical or numerical. In general, analytical solutions are preferable to numerical solutions because analytical ones yield complete solutions and are computationally fast and reliable. However, analytical closed-form solutions for inverse kinematics of 6-DOF arms rarely exist for real-time control purpose of fast moving arm...

Steel-lined pressure tunnels and shafts are used to convey water from the reservoir to the turbines in high-head hydroelectric power plants. An axisymmetrical multilayer model is often considered by engineers for the design of the steel liner. Stresses and deformations can then be computed with a closed-form analytical solution in isotropic rock. When the rock is anisotropic, the lowest elastic...

In this study, the new refine trigonometric shear deformation plate theory is used to study the out-of-plane vibration of the rectangular isotropic plates with different boundary conditions. The novelty of the research is that the analytical precision closed-form solution is developed without any use of approximation for a combination of six different boundary conditions; specifically, two oppo...

This paper deals with full face excavation of large size tunnels in rock masses of very poor quality which exhibit squeezing problems. Three different time dependent constitutive models of increasing complexity (a viscoelasticplastic model, an elastic-viscoplastic model, and an elastic-plastic-viscoplastic model) are used to analyze the tunnel response during excavation of the Saint Martin La P...

An elastic-plastic model for contacting rough surfaces that is based on accurate Finite Element Analysis (FEA) of an elasticplastic single asperity contact is presented. The plasticity index Ψ is shown to be the main dimensionless parameter that affects the contact of rough surfaces. Below Ψ = 0.6 the contact problem is purely elastic and above Ψ = 8 it is mostly plastic. The mean real contact ...

In this paper, the effect of elastic foundation on the out of plane displacement of functionally graded circular plates using differential transform method is presented. Differential transform method is a semi-analytical-numerical solution technique that is capable to solve various types of differential equations. Using this method, governing differential equations are transformed into recursiv...

• Influence of plastic material properties on fracture resistance parameter is analyzed. Mechanism-based strain-gradient plasticity theory, Taylor dislocation model are used. Amplitude and stress intensity factors for strain gradient formulated. Behavior SIFs differs significantly from HRR solution. The crack tip mechanics solids investigated analytically numerically. A first-order mechanism-ba...

Abstract This study investigates the influence of a circular crack breaker on mode-III deformation behavior semi-infinite in homogeneous, elastic orthotropic material subjected to longitudinal shear loads. The Galilean transformation is employed convert governing wave equation Laplace’s which time independent, rendering problem amenable analysis within realm classical theory two-dimensional ela...

The analytical solution is obtained for a semi-infinite linear elastic solid with a sinusoidal, “wavy” surface profile subject to applied strain. The amplitude A of a deformed wavy surface is related to the initial amplitude A0 and the applied strain a through the simple expression A A0 1 a . This relation is confirmed independently by finite element analyses and experimental measurements of st...