Seminarios de Estructuras: Shankar Sankararaman y Roberto Palma

Seminarios dentro del programa del Máster de Estructuras y el programa de Doctorado en Ingeniería Civil:
Conferencia I: Uncertainty in Engineering: An Overview
- Conferenciante: Shankar Sankararaman. Researcher, NASA Ames Research Center
- Fecha y hora: Lunes, 17 de noviembre 2014 a las 11:30h
- Lugar: Seminario I, 4ª planta, E.T.S Ing. Caminos, C. y P., Campus de Fuentenueva
- Abstract: This talk discusses the impact of uncertainty in different types of engineering applications and presents an overview of the state-of-the-art computational methods for uncertainty quantification and management, with an emphasis on structural engineering applications. To begin with, a comprehensive framework for the treatment of uncertainty is essential to facilitate decision-making in engineering systems at every stage of the life cycle, such as design, manufacturing/construction, operations, system health monitoring, and risk management. It is not only important to identify and quantify the different sources of uncertainty that may arise due to natural variability, data uncertainty, and model uncertainty, but also necessary to quantify their combined effect on the system-level prediction.
  A Bayesian methodology will be presented for uncertainty quantification and integration in complex systems where the overall system can be decomposed into multiple subsystems and components that interact with one another. This methodology is based on the concept of Bayesian networks that serve as an efficient tool for integrating uncertain quantities (that are a part of the engineering application) along with corresponding component-level, subsystem-level, and system-level models and experimental data using the concepts of conditional probability and total probability. Bayesian networks are useful for different types of such as system-level performance prediction, design, optimal resource allocation, etc. Finally, this talk will also discuss on the impact of uncertainty on system health monitoring (during system operation) through efficient diagnosis and prognosis.
- Shankar Sankararaman: Shankar Sankararaman received his Bachelors’ degree in Civil Engineering from the Indian Institute of Technology, Madras in India in 2007 and later, obtained his Ph.D. in Civil Engineering from Vanderbilt University, Nashville, Tennessee, U.S.A. in 2012. His research focuses on the various aspects of uncertainty quantification, integration, and management in different types of aerospace, mechanical, and civil engineering systems. His research interests include probabilistic methods, risk and reliability analysis, Bayesian networks, system health monitoring, diagnosis and prognosis, decision-making under uncertainty, treatment of epistemic uncertainty and multidisciplinary analysis.
  He is a member of the Non-Deterministic Approaches (NDA) technical committee at the American Institute of Aeronautics, the Probabilistic Methods Technical Committee (PMC) at the American Society of Civil Engineers (ASCE), and the Prognostics and Health Management (PHM) Society. Currently, Shankar is a researcher at NASA Ames Research Center, Moffett Field, CA, where he develops algorithms for uncertainty assessment and management in the context of system health monitoring, prognostics, and decision-making.
Conferencia II: Cosserat modelling of inhomogeneous flexo-electro-magneto-thermo-elastic media using the Finite Element Method
- Conferenciante: Roberto Palma. Department of Mechanical Engineering and Construction Universitat Jaume I
- Fecha y hora: Lunes, 17 de noviembre 2014 a las 12:30h
- Lugar: Seminario I, 4ª planta, E.T.S Ing. Caminos, C. y P., Campus de Fuentenueva
- Abstract: The use of multi-coupled materials in modern applications is increasing due to their multi-functionality. However, many of these applications use micro-devices and the micro-structure of the materials should be considered. Therefore, the study of multi-coupled materials taking into account their micro-structure is a challenge for the Continuum Mechanics community. The present work presents a 3D Finite Element formulation to study a fully coupled thermo-electro-magneto-mechanic problem assuming small deformation and taking into account the micro-structure of the medium. For this purpose, a Cosserat micropolar model is considered: macro-continuum is simulated by macro-displacement and micro-continuum by micro-rotations. From a theoretical point of view, the governing equations are obtained using a Continuum Physics approach. From Mechanics, the linear and angular momentum balance equations are stated. From Electrodynamics, the Maxwell laws are used to obtain the electromagnetic equilibrium equations and the scalar potentials. From Thermodynamics, the entropy balance and the constitutive equations are calculated by assuming small increment of temperature to guarantee reversible (conservative) processes.
  From a numerical point of view, standard first-order isoparametric eight node elements with nine degrees of freedom per node (three macro-displacements, three micro-rotations, electric potential, magnetic potential and temperature) are used. Time integrations are solved by using the Newmark-b algorithm and non-linearities, which arise due to the presence of the Maxwell stress tensor, by the Newton-Rhapson.
- Roberto Palma: Roberto Palma received his Physics (2005), M. Sc. (2006) and Ph.D. (2012) bythe University of Granada (Spain). He obtained a research grant FPU by the Ministerio de Educación to develop his postgraduate studies at the Mechanical Engineering department of theUniversity of Granada. Since 2013, he is Assistant Professor in the Universitat Jaume I at Castellón (Spain). His research has gravitated around thermodynamic formulation for non-linear FE applied to multi-coupled materials, optimization andinverse modeling, with some incursions in seismic engineering applied to experimental design in High Energy Physics. He has published 17 papers in refereed journals that have received 117 cites being his h-index 7;1 book chapter and 19 contributions in confereces. He has participated in 7 research projects supported by Spanish Government, European Community and private companies. In 2012, he received the SEMNI Best PhD Thesis Award.

Seminarios de Estructuras: Shankar Sankararaman y Roberto Palma

17 noviembre 2014 | 10:30 - 12:30 h

Actividades culturales y de divulgación
Conferencias, seminarios, divulgación científica

Fechas y horarios

Seminarios de Estructuras: Shankar Sankararaman y Roberto Palma

17 noviembre 2014 | 10:30 - 12:30 h

Actividades culturales y de divulgaciónConferencias, seminarios, divulgación científica

Fechas y horarios

Actividades culturales y de divulgación
Conferencias, seminarios, divulgación científica