Browsing by Subject "Mathematics, Interdisciplinary"
Now showing items 120 of 23

Bayesian uncertainty quantification and propagation for discrete element simulations of granular materials
(2014)Predictions in the behavior of granular materials using Discrete Element Methods (DEM) hinge on the employed interaction potentials. Here we introduce a data driven, Bayesian framework to quantify DEM predictions. Our ... 
Bifurcations and catastrophes of a twodegreesoffreedom nonlinear model simulating the buckling and postbuckling of rectangular plates
(2007)The nonlinear buckling and postbuckling behavior of rectangular plates in symmetric and antisymmetric modes is reexamined, in the context of Bifurcation and Catastrophe Theories, using a twodegreesoffreedom model, which ... 
The effect of infinitesimal damping on the dynamic instability mechanism of conservative systems
(2008)The local instability of 2 degrees of freedom (DOF) weakly damped systems is thoroughly discussed using the LienardChipart stability criterion. The individual and coupling effect of mass and stiffness distribution on the ... 
An experimental study of interface relaxation methods for composite elliptic differential equations
(2008)The recently proposed simulation framework of interface relaxation for developing multidomain multiphysics simulation engines is considered. An experimental study of the behavior of two representative interface relaxation ... 
Finite Element Analysis of Discrete Circular Dislocations
(2010)The present work gives a systematic and rigorous implementation of (edge type) circular Volterra dislocation loops in ordinary axisymmetric finite elements using the thermal analogue and the integral representation of ... 
Finite element implementation of gradient plasticity models  Part I: Gradientdependent yield functions
(1998)Theories with intrinsic or material length scales find applications in the modeling of sizedependent phenomena such as, for example, the localization of plastic flow into shear bands. In gradienttype plasticity theories, ... 
Finite element implementation of gradient plasticity models  Part II: Gradientdependent evolution equations
(1998)The variational formulation and finite element implementation of a class of plasticity models with gradientdependent yield functions is covered in detail in Part I. In this sequel, attention is focussed upon the finite ... 
Inputoutput decoupling for linear systems with nonlinear uncertain structure
(1996)in this paper the problem of inputoutput decoupling for linear systems with nonlinear uncertain structure, via an independent of the uncertainties static state feedback law, is studied and solved for the first time. The ... 
Laminar film flow along a periodic wall
(2000)Laminar, gravitydriven flow of a liquid down an inclined wall with largeamplitude sinusoidal corrugations is studied numerically by a spectral spatial discretization method. The synchronous resonance between the wall and ... 
Meeting transfer function requirements via static measurement output feedback
(1998)The important transfer function design problems of inputoutput decoupling, exact model matching and disturbance rejection, via static measurement output feedback, are studied for the case of generalized state space systems. ... 
Mixed finite element formulations of straingradient elasticity problems
(2002)Theories on intrinsic or material length scales find applications in the modeling of sizedependent phenomena. In elasticity, length scales enter the constitutive equations through the elastic strain energy function, which, ... 
Modelreduction techniques for Bayesian finite element model updating using dynamic response data
(2014)This work presents a strategy for integrating a class of model reduction techniques into a finite element model updating formulation. In particular a Bayesian model updating approach based on a stochastic simulation method ... 
MODELING, ANALYSIS AND RELIABILITY OF SEISMICALLY EXCITED STRUCTURES: COMPUTATIONAL ISSUES
(2008)A critical review of the current state of the art of the computing practices adopted by the earthquake engineering community is presented. Advanced computational tools are necessary for estimating the demand on seismically ... 
Numerical methods for porous metals with deformationinduced anisotropy
(2004)A constitutive model for porous metals subjected to general threedimensional finite deformations is presented. The model takes into account the evolution of porosity and the development of anisotropy due to changes in the ... 
Output feedback decoupling of linear systems with nonlinear uncertain structure
(1996)The problem of inputoutput decoupling for linear systems with nonlinear uncertain structure, via an independent of the uncertainties static output feedback law, is solved. The necessary and sufficient conditions for the ... 
Pareto optimal sensor locations for structural identification
(2005)Theoretical and computational issues arising in the selection of the optimal sensor configuration for parameter estimation in structural dynamics are addressed. The objective is to optimally locate sensors in the structure ... 
Porous metals with developing anisotropy: Constitutive models, computational issues and applications to deformation processing
(2000)A constitutive model for a porous metal subjected to general threedimensional finite deformations is presented. The model takes into account the evolution of porosity and the development of anisotropy due to changes in ... 
Robust triangular decoupling via output feedback
(2000)The problem of inputoutput triangular decoupling for linear systems with nonlinear uncertain structure, via an independent of the uncertainties static output feedback law, is solved. The necessary and sufficient conditions ... 
Structural model updating and prediction variability using Pareto optimal models
(2008)A multiobjective identification method for structural model updating based on modal residuals is presented. The method results in multiple Pareto optimal structural models that are consistent with the experimentally ...