El método de los elementos finitos


Book Description

Este libro hace una presentación del método de los elementos finitos como técnica para la solución de ecuaciones diferenciales parciales (EDP) de tipo elíptico, parabólico e hiperbólico. El desarrollo del texto incluye tanto una formulación matemática consistente, como aplicaciones clásicas en el campo de la transferencia de calor, la elasticidad y la mecánica de fluidos. La obra inicia con una breve exposición del método de los residuos ponderados y luego ilustra su aplicación en la solución con elementos finitos de ecuaciones diferenciales. A continuación, se presentan planteamientos con elementos de orden superior, así como consideraciones para el planteamiento de soluciones con condensación estática y elementos jerárquicos. Posteriormente se tratan las EDP elípticas, tanto para el caso de problemas escalares (problemas de conducción de calor) como para problemas vectoriales (elasticidad plana). La construcción de aproximaciones para problemas en estado transitorio es revisada en la siguiente sección, así como el análisis de las condiciones de estabilidad requeridas. De igual forma, se analiza la formulación de elementos finitos para problemas con términos de transporte y se explica detalladamente el origen y la implementación de la técnica de estabilización Streamline Upwind Petrov-Galerkin (SUPG). En la última sección se expone un breve estudio sobre la construcción de soluciones para EDP no lineales.




Dam Maintenance and Rehabilitation


Book Description

During the life of a dam, changes in safety standards, legislation and land use will inevitably occur, and functional deterioration may also appear. To meet these challenges, these Proceedings from a panel of international experts assess, define and re-evaluate the design criteria for the construction of dams and the many attendant issues in on-going maintenance and management. Authors include international specialists: academics, professionals and those in local government, utilities and suppliers. Practitioners from these same fields will find the book a useful tool in acquiring a comprehensive knowledge of managing and retrofitting dams, so that they can continue to meet society's needs.




From Fundamentals to Applications in Geotechnics


Book Description

The work of geotechnical engineers contributes to the creation of safe, economic and pleasant spaces to live, work and relax all over the world. Advances are constantly being made, and the expertise of the profession becomes ever more important with the increased pressure on space and resources. This book presents the proceedings of the 15th Pan-American Conference on Soil Mechanics and Geotechnical Engineering (XV PCSMGE), held in Buenos Aires, Argentina, in November 2015. This conference, held every four years, is an important opportunity for international experts, researchers, academics, professionals and geo-engineering companies to meet and exchange ideas and research findings in the areas of soil mechanics, rock mechanics, and their applications in civil, mining and environmental engineering. The articles are divided into nine sections: transportation geotechnics; in-situ testing; geo-engineering for energy and sustainability; numerical modeling in geotechnics; foundations and ground improvement; unsaturated soil behavior; embankments, dams and tailings; excavations and tunnels; and geo-risks, and cover a wide spectrum of issues from fundamentals to applications in geotechnics. This book will undoubtedly represent an essential reference for academics, researchers and practitioners in the field of soil mechanics and geotechnical engineering. In this proceedings, approximately 65% of the contributions are in English, and 35% of the contributions are in Spanish or Portuguese.




IV Latin American Congress on Biomedical Engineering 2007, Bioengineering Solutions for Latin America Health, September 24th-28th, 2007, Margarita Island, Venezuela


Book Description

The IV Latin American Congress on Biomedical Engineering, CLAIB2007, corresponds to the triennial congress for the Regional Bioengineering Council for Latin America (CORAL), it is supported by the International Federation for Medical and Biological Engineering (IFMBE) and the Engineering in Medicine, Biology Society (IEEE-EMBS). This time the Venezuela Society of Bioengineering (SOVEB) organized the conference, with the slogan Bioengineering solution for Latin America health.




V Latin American Congress on Biomedical Engineering CLAIB 2011 May 16-21, 2011, Habana, Cuba


Book Description

This volume presents the proceedings of the CLAIB 2011, held in the Palacio de las Convenciones in Havana, Cuba, from 16 to 21 May 2011. The conferences of the American Congress of Biomedical Engineering are sponsored by the International Federation for Medical and Biological Engineering (IFMBE), Society for Engineering in Biology and Medicine (EMBS) and the Pan American Health Organization (PAHO), among other organizations and international agencies and bringing together scientists, academics and biomedical engineers in Latin America and other continents in an environment conducive to exchange and professional growth.




INTRODUCTION TO FINITE ELEMENT METHOD


Book Description

This text is designed for those who already know structural calculation. It starts with the simple exercise of reformulating the direct stiffness method using matrices. The aim is to allow the student to understand the enormous power and generality of the weak formulation for the approximation of strut structure problems by using a formulation which is easy to understand. The correspondence of results of the initial classical formulation with those of the FEM when using linear shape functions and Hermite polynomials allows us to tackle the general formulation of the fundamental concepts of the method more easily. Once the method and the details of its general formulation are understood (although only through its application in a specific structural type), the FEM is presented in a general way, as a procedure for obtaining approximated solutions for partial differential equations. The approaches to field problems and to linear elasticity problems are presented as examples. The method has been now clearly presented and therefore, the selection of the type of element, with the generation of interpolation functions of higher degree and their systematization in element families, can be studied in greater depth. This part finishes with the introduction of the idea of isoparametric transformation that, together with numerical integration, explains the stage of development reached by the method. Finally, the subject relative to plates is dealt with, looking at their specific use as structural elements, and trying to show the difficulty of satisfying the continuity between elements in thin plates, and the shear locking solution in thick plates amongst other things




Machine Elements in Mechanical Design


Book Description

CD-ROM contains: the mechanical design software MDESIGN, which "enables users to quickly complete the design of many of the machine elements discussed in the book."




Geotechnical Engineering in the XXI Century: Lessons learned and future challenges


Book Description

The first Pan-American Conference on Soil Mechanics and Geotechnical Engineering (PCSMGE) was held in Mexico in 1959. Every 4 years since then, PCSMGE has brought together the geotechnical engineering community from all over the world to discuss the problems, solutions and future challenges facing this engineering sector. Sixty years after the first conference, the 2019 edition returns to Mexico. This book, Geotechnical Engineering in the XXI Century: Lessons learned and future challenges, presents the proceedings of the XVI Pan-American Conference on Soil Mechanics and Geotechnical Engineering (XVI PCSMGE), held in Cancun, Mexico, from 17 – 20 November 2019. Of the 393 full papers submitted, 335 were accepted for publication after peer review. They are included here organized into 19 technical sessions, and cover a wide range of themes related to geotechnical engineering in the 21st century. Topics covered include: laboratory and in-situ testing; analytical and physical modeling in geotechnics; numerical modeling in geotechnics; unsaturated soils; soft soils; foundations and retaining structures; excavations and tunnels; offshore geotechnics; transportation in geotechnics; natural hazards; embankments and tailings dams; soils dynamics and earthquake engineering; ground improvement; sustainability and geo-environment; preservation of historic sites; forensics engineering; rock mechanics; education; and energy geotechnics. Providing a state-of-the-art overview of research into innovative and challenging applications in the field, the book will be of interest to all those working in soil mechanics and geotechnical engineering. In this proceedings, 58% of the contributions are in English, and 42% of the contributions are in Spanish or Portuguese.




Notes on Continuum Mechanics


Book Description

This publication is aimed at students, teachers, and researchers of Continuum Mechanics and focused extensively on stating and developing Initial Boundary Value equations used to solve physical problems. With respect to notation, the tensorial, indicial and Voigt notations have been used indiscriminately. The book is divided into twelve chapters with the following topics: Tensors, Continuum Kinematics, Stress, The Objectivity of Tensors, The Fundamental Equations of Continuum Mechanics, An Introduction to Constitutive Equations, Linear Elasticity, Hyperelasticity, Plasticity (small and large deformations), Thermoelasticity (small and large deformations), Damage Mechanics (small and large deformations), and An Introduction to Fluids. Moreover, the text is supplemented with over 280 figures, over 100 solved problems, and 130 references.




Risk Analysis, Dam Safety, Dam Security and Critical Infrastructure Management


Book Description

This book offers the state of the art on risk analysis, representing a primary tool for achieving effective management of critical infrastructures along with a suitable framework for the development of risk management models regarding natural, technological and human-induced hazards. Essential reading for graduate students and researchers interested in risk analysis as applied to all type of critical infrastructures, and for designers, engineers, owners and operators of critical infrastructures in general and dams in particular.