HERRERA GARRIDO , María Ángeles

El objetivo principal de esta tesis es proponer una metodología para caracterizar soluciones elásticas singulares en el entorno de puntos singulares en esquinas anisótropas de un solo material o de varios materiales a través de la expansión de la serie asintótica. La primera parte de esta tesis realiza un estudio del estado del arte,...

Se presenta una generalización del modelo de la grieta de interfaz de Comninou para bimateriales anisótropos desarrollada a partir de la aplicación del formalismo de Stroh y la matriz de impedancia de Ting, y considerando la ley de Coulomb para fricción isótropa en la interfaz de la grieta. De esta forma, tenemos una solución analítica con la...

A computational code based on a semianalytic procedure for the determination of the characteristic exponents and the singular stress and displacement fields in multi-material corners is developed. Linear elastic anisotropic materials under generalized plane strain state are considered. This code is a universal computational tool able to analyze...

Problems of stress singularities in single or multi-material corners have been addressed by many authors over the years. Most of the authors presented closed-form corner-eigenequations for special cases, and often there is no easy way to check if the solution is correct. In this work, we present a general computational tool that can solve many...

A new general semi-analytic procedure for the characterisation of singular asymptotic elastic states in the vicinity of the apex of linearly elastic anisotropic multi-material corners, including frictional contact, is developed and tested. The corners can consist of any finite number of homogeneous wedges defined by polar sectors. The...

In steel, the knowledge beyond the yield strength elastic is of the utmost importance because of the large plastic strain that take place both at the time of the breakage and multiple conformation processes involving a stretch of material, such as rolling or extrusion. Beyond the manufacturing process, the trend nowadays is to the use of more...

The calculation of the true stress and strain values during the tensile test necking phase of smooth ductile metals specimens has been extensively pursued by several authors. A symmetrical neck profile, which leads to axial-symmetrical behaviour, is usually considered. In this study, the neck geometry of Temp-core ribbed bars, the most commonly...

The web application SingSol offers a user-friendly and versatile tool for researchers and engineers that need to determine the singularity exponents and the singular stress and displacement fields in multi-material linear elastic corners with homogeneous boundary conditions. It covers a wide range of configurations, involving homogeneous wedges...

El estudio del comportamiento real hasta rotura de los metales resulta de gran interés en la industria ya que permite determinar la tenacidad o energía absorbida durante el proceso de deformación y rotura. En cuanto a los aceros estructurales, existe el interés añadido de conocer su respuesta real ante cargas asociadas a situaciones límites...