Transient/Dynamic Analysis and Constitutive Laws for Engineering Materials

Numerical methods and related computer based algorithms form the logical solution for many complex problems encountered in science and engineering. Although numerical techniques are now well established, they have continued to expand and diversify, particularly in the fields of engineering analysis and design. Various engineering departments in the University College of Swansea, in particular, Civil, Chemical, Electrical and Computer Science, have groups working in these areas. It is from this mutual interest that the NUMET A conference series was conceived with the main objective of providing a link between engineers developing new numerical techniques and those applying them in practice. Encouraged by the success of NUMETA '85, the second conference, NUMETA '87, was held at Swansea, 6-10 July 1987. Over two hundred and twenty abstracts were submitted for consideration together with a number of invited papers from experts in the field of numerical methods. The final selection of contributed and invited papers were of a high quality and have culminated in the two volumes which form these proceedings. This volume contains papers on the themes of 'Transient/Dynamic Analysis and Constitutive Laws for Engineering Materials'. Many new developments on a wide variety of topics have been reported and these proceedings contain a wealth of information and references which we believe will be of great interest to theoreticians and practising engineers alike.

Section T - Transient/Dynamic Analysis.- T1 Finite Element Calculation of Unilateral Contact with Friction in Non Steady-State Processes.- T2 An Implicit Formulation for Finite Element Analysis of Dynamic Plastic Deformation in 2D Geometry.- T3 Generalized Differences in Direct Integration Methods for Transient Analysis.- T4 Acceleration of the Convergence for Viscous Flow Calculations.- T5 Properties and Solutions of the Eigensystem of Nonproportionally Damped Linear Dynamic Systems.- T6 Partial Energy Absorbing Boundary for Dynamic Crack Propagation.- T7 Nonlinear Dynamic Analysis of Shells of Revolution using Reduced Basis Techniques.- T8 Nonlinear Dynamic Analysis of Framed Structures with Initial Imperfections.- T9 Finite Element Method for Large Amplitude Free Vibration of Cable Structures.- T10 Transonic Flow Calculations through Plane Turbine Cascades using the Navier-Stokes Equations.- T11 Finite Elements versus Finite Differences for Fluid Flow Problems.- T12 An Algorithm for the Three-Dimensional Transient Simulation of Non-Newtonian Fluid Flows.- T13 A Transmitting Boundary in Time Domain for Soil-Structure Interaction Problems.- T14 Consolidation Behaviour of Clay at Plane Strain Paths.- T15 A Hybrid F.E. Model for Convection-Diffusion Problems.- T16 Green’s Functions and Boundary Integral Formulation for the Problems of Dynamic Poroelasticity.- T17 Substructuring Modal Synthesis Method for 3-D Dynamic Analysis.- T18 Vibration of Ring-Stiffened Cones Submerged in Water.- T19 A Search Method for the Construction of Maximally Stable Difference Schemes for Partial Differential Equations.- T20 Numerical Simulation of Vortex Shedding Induced Oscillations of a Circular Cylinder.- T21 Recursive Response Statistics of Nonlinear Structures.- T22 Coupled Vibrations of Axially Moving Material and Surrounding Fluid by FEM.- T23 Elastic-Plastic Dynamic Buckling of Imperfect Thin Shell Finite Elements.- T24 A Combined Scheme of Heat Polynomials and Finite Differences for Two-Dimensional Heat Conduction Problems.- T25 Finite Element Analysis of Fully Coupled Transient Thermo-Elasticity.- T26 Application of Padé Approximants to the Simulation of Fluid-Structure Interactions in Irregular Seaways.- T21 An Iteration Method for a Nonlinear Shear Flow Through a Heavily Loaded Actuator Disk with a Large Hub.- T28 Transonic Flow Computations over a Boat-Tail Body using Finite Element Method.- T29 A Simulation Scheme for Numerical Analysis of Active Control Systems for Tall Buildings.- T30 3-Dimensional Acoustics of Rigid or Moving Surfaces: Integral Formulation, Explicit Time Scheme and Subsequent Frequency Analysis.- T31 Element-by-Element Solution of Nonlinear Steady State Heat Conduction by a Newton-Lanczos Method.- T32 Finite Element Flow Analysis using the Velocity Correction Method.- T33 An Explicit Type Finite Element Method for Dynamic Analysis of Structures.- T34 Boundary Element Method for Tidal Flow.- T35 Two-step Explicit Finite Element Method for Tsunami Analysis Considering Open Boundary Condition.- T36 Finite Element Analyses of Transient Viscous Creeping Flows with Free Surfaces using Marker Particles.- T37 Constitutive Factors in Transient Internal Flows.- T38 Dynamic Substructure Analysis using Enhanced Lanczos-Ritz Vectors.- T39 Development of a new Effective Single Step Average Velocity Based Explicit Taylor-Galerkin Finite Element Algorithm for Computational Dynamics.- T40 Simulation Analysis of Ground Liquefaction in a Soil-structures System of a Shaking Table Test.- T41 On a Class of Large Time Increment Algorithms.- T42 Flow Induced by a Fanned Out Jet Group.- T43 Modelling of Non-Steady Flow in Pipe Networks.- T44 The Transformed Viscous Boundary in Dynamic Finite Element Analysis.- T45 Analysis of Higher Order Explicit Time Integration Operators for Nonlinear Problems.- T46 Fluid-Structure Modal Analysis. New Symmetric Continuum-Based Formulations. Finite Element Applications.- T47 Dynamic Analysis for Generalized Three Dimensional Contact and Fracturing of Multiple Bodies.- T48 Dynamic Analysis of Biomechanical Systems for Occupant Trauma Assessment During Impact.- T49 Single Step Averaging Generalised Smith Transmitting Boundary in Computational Dynamics.- T50 Long Wave Problems in Harbours: Numerical Techniques and Boundary Conditions.- T51 Numerical Solution for the Total Response of Saturated Porous Media Leading to Liquefaction and Subsequent Consolidation.- T52 Stability Analysis of Dynamically Loaded Structures.- T53 Finite Elements for Highly Viscoelastic Flows.- T54 Penetration and Fracturing of Brittle Plates under Dynamic Impact.- Section C - Constitutive Laws for Engineering Materials.- C1 A Finite Element Calculation of Axisymmetrical Forging of Isotactic Polypropylene.- C2 Traversing Critical Points with Penalty Springs.- C3 Constitutive Models and Field Predictions in Geomechanics.- C4 Bifurcation Analysis of Tangential Material Operators.- C5 Domains of Behaviour and Behaviour of Reinforced Soils.- C6 An Alternative Approach to Capture Localization of Shear Band.- C7 A Simplified Cyclic Model for Sand.- C8 Predictions of Pore Water Pressures and Stress Changes during Thin Walled Tube Sampling.- C9 Description of Progressive Failure in Concrete.- C10 Yield Criteria for Brittle or Ductile Materials.- C11 Quadratic Programming with Parametric Vector in Plasticity and Geomechanics.- C12 Lower Bound Limit Analysis for Plane Problems in Soil Mechanics.- C13 Influence of Geometry on the Propagation of Elastic-Plastic Longitudinal Waves in Metal Bars using the Finite Element Method.- C14 Some Geometrical Features of the Rate-Type Plasticity Theory for Structural Metals.- C15 On Consistent Tangent Matrices for Frictional Contact Problems.- C16 A Relation between Plastic Yielding and Internal Back Stress.- C17 A Strain Tensor Polynomial Failure Criterion for Anisotropic Materials.- C18 Significance of Testing Procedure and Equipment on Determination of Constitutive Parameters for Soil.- C19 A FEM Analysis of Quasistatic Necking and Localization using an Arc Length Method.- C20 Material Model for the Analysis of Reinforced Concrete Shells.- C21 A Note on the Finite Element Simulation of Strain Localization.- C22 Numerical Simulation of Hydrogen Diffusion and Trapping in Steels.- C23 A Fully Elastoplastic Constitutive Model for Non Linear Analysis of Concrete.- C24 Constitutive Complexity Versus Simplicity : Elements of Choice.- C25 Computational Methods for Constitutive Equations with Volume Constraints in Elasto-Plastic or Elasto-Viscoplastic Finite Deformation.- C26 Influence of Grain Shape and Size on the Behaviour of Granular Materials.- C27 FEA Predictions of Residual Stress in Stainless Steel Compared with Neutron and X-ray Diffraction Measurements.- C28 Viscoplastic Model with Generalized Yield Function.- C29 Hierarchical Constitutive Models and Numerical Implementation.- C30 Some Aspects of the Numerical Modelling of Concrete and Soil.- C31 A Generalized Plasticity Continuous Loading Model for Geomaterials.