Engineering Computations: Volume 18 Issue 3/4

Towards fully parallel aerospace simulations on unstructured meshes

N.P. Weatherill, O. Hassan, K. Morgan, J.W. Jones, B. Larwood

A general philosophy is presented in which all the modules within the computational cycle are parallelised and executed on parallel computer hardware, thereby avoiding the…

Shape sensitivity calculations for exterior acoustics problems

Gonzalo R. Feijóo, Manish Malhotra, Assad A. Oberai, Peter M. Pinsky

The purpose of this paper is to present a method to calculate the derivative of a functional that depends on the shape of an object. This functional depends on the…

Thermal optimisation in the sand casting process

R.W. Lewis, M.T. Manzari, D.T. Gethin

The general procedure of thermal optimisation in the sand casting process is addressed. Various aspects of design including the size and position of feeders and chills are…

A 3D finite element formulation describing the frictional behavior of rubber on ice and concrete surfaces

T. Huemer, W.N. Liu, J. Eberhardsteiner, H.A. Mang

The frictional behavior of rubber materials on various contact surfaces is strongly affected by the contact pressure and the relative sliding velocity as well as the…

Design optimization of structural steelwork using a genetic algorithm, FEM and a system of design rules

V.V. Toropov, S.Y. Mahfouz

In this paper a structural optimization technique based on a modified genetic algorithm (GA) is presented. The technique is developed to deal with discrete design…

Evolutionary structural optimization for connection topology design of multi‐component systems

Qing Li, Grant P. Steven, Y.M. Xie

Most engineering products contain more than one component or structural element, a consideration that needs to be appreciated during the design process and beyond, to…

A practical hybrid interior error estimator for localized h‐adaptive FEA

J.N. Reddy, S. Mukherjee

A practical method for localized h ‐adaptive error estimation is presented based on interior estimates of the Galerkin solution. A previously published hybrid interior…

Simulation of physical experiments in immersive virtual environments

Ahmed K. Noor, Tamer M. Wasfy

An object‐oriented event‐driven immersive virtual environment is described for the creation of virtual labs (VLs) for simulating physical experiments. Discussion focuses…

On the convergence of incompressible finite element formulations: The Patch Test and the inf‐sup condition

Eduardo N. Dvorkin

Engineers have developed robust and efficient incompressible finite element formulations using tools such as the Patch Test and the counting of constraints/variables, the…

Parallelised finite/discrete element simulation of multi‐fracturing solids and discrete systems

D.R.J. Owen, Y.T. Feng

This paper outlines a dynamic domain decomposition‐based parallel strategy for combined finite/discrete element analysis of multi‐fracturing solids and discrete systems…

Computational modelling of viscoplastic fluids based on a stabilised finite element method

D. Peric, S. Slijepcevic

This work is concerned with computational modelling of viscoplastic fluids. The flows considered are assumed to be incompressible, while the viscoplastic laws are obtained…

Finite‐element modeling of dry sliding wear in metals

J.F. Molinari, M. Ortiz, R. Radovitzky, E.A. Repetto

This paper is concerned with the calibration and validation of a finite‐element model of dry sliding wear in metals. The model is formulated within a Lagrangian framework…

Sensitivity analysis and optimization for non‐linear structural response

Stefan Schwarz, Ekkehard Ramm

The present contribution deals with the sensitivity analysis and optimization of structures for path‐dependent structural response. Geometrically as well as materially…

Combination of the critical displacement method with a damage model for structural instability analysis

E. Oñate, H. Tschöpe, P. Wriggers

The paper describes the extension of the critical displacement method (CDM), presented by Oñate and Matias in 1996, to the instability analysis of structures with…

Enhancing structural topology optimization

J.E. Akin, Javier Arjona‐Baez

The goal of structural optimization is to find the best possible configuration that minimizes the objective function and satisfies a set of constraints. Here we present a…

Enhanced integral form of the Newmark time stepping scheme for pseudodynamic testing

William Algaard, Alan Agar, Nenad Bicanic

A novel integral form time‐integration algorithm for pseudodynamic testing is proposed, based on the Newmark implicit algorithm. The scheme builds on the recently proposed…

Deterioration analysis of materials and finite elements

Kaspar Willam, Inkyu Rhee

In this study we examine the spectral properties of stiffness degradation at the constitutive level and at the levels of finite elements and their assemblies. The…