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Seismic Wave Propagation by Finite Differences on the Connection Machine
Seismic modeling represents a difficult numerical challenge and consumes a significant amount of CPU time on the largest available supercomputers. With the advent of massively-parallel...

Behaviour of Prestressed Concrete End Blocks
This paper briefly reports on a series of experiments carried out on strip-loaded prestressed concrete end blocks. The results show that corresponding design methods presently used in...

Cylindrical Shell Redesign by Large Admissible Perturbations
Redesign (or inverse design) is the problem of defining an objective structural State S2 from its specifications and the known baseline State S1. The large admissible perturbations approach...

Wave Propagation in Fluid Loaded Periodic Structures
Periodic structures, such as rib stiffened plates or cylindrical shells, are frequently used as major structural components in naval and aerospace applications. For these applications,...

Stress Relaxation Analysis for Sealants
A solution method for stress relaxation analysis of systems composed linear viscoelastic material in a state of plane strain is presented. The incremental, finite element method takes...

Nonisothermal Viscoplasticity
A nonisothermal theory of viscoplasticity is formulated for a medium subjected to finite deformation. The basic system of equations consists of the laws of conservation of linear and angular...

Numerical Implementation of Nonlocal Elastoplastic Damage Theory
A nonlocal elastoplastic damage theory recently proposed by Valanis (1992) is implemented into a finite element wave code. The model retains hyperbolicity even under strain softening,...

Relationships Between Error Estimation and Adaptive Computations in Strain Localization
In this work, the a posteriori error estimates and the h mesh refinement techniques using hierarchical finite element shape functions are tailored for numerical simulations of strain localization...

Water Wave Generated by a Porous Wavemaker
A vertical porous wavemaker sitting in an infinitely long channel of constant depth is studied. The wavemaker performs horizontal oscillatory motion. A simplified analytical approach for...

Computer Simulation of Direct Shear Test
This paper presents a pilot study of a computer simulation of direct shear test on sands using the Discrete Element Method. The numerical test setup is described first, which is followed...

Numerical Integration of Transient Creep Constitutive Equations for Polycrystalline Ice
A numerical time integration algorithm is developed to solved the system of coupled, first-order differential equations characterizing the physically-based constitutive model of Shyam...

Constitutive Modeling for Material with Perfect Disordered Heterogeneity
Finite element analysis with large number of elements are performed to simulate perfect disordered heterogenous material. The probabilistic nature of the micromechanical behavior of the...

Nonlinear Dynamic Response of Framed Structures Using the Mode Superposition Method
This paper describes a methodology for nonlinear dynamic response analysis of framed structures using the mode superposition method. A portal frame example is presented and compared to...

Nonlinear Analysis of Strain-Softening Damage under Monotonic and Cyclic Loading
The paper reviews the modeling of damage by the microplane model and presents extensions required for cyclic loading. The general microplane constitutive model is implemented in a three-dimensional...

Steady-State Nonlinear Heat Transfer in Multilayered Composite Panels
A two-dimensional computational model is developed for the nonlinear heat transfer in multilayered composite panels. The model is based on a first-order thermal lamination theory with...

Nonlinear Geometric and Material Considerations in Shell Structures
A geometrically and materially nonlinear static shell theory allowing large displacements, rotations, and strains with parabolic shear is developed. The theory is cast into a total Lagrangian...

A Shear Locking Free Three-Node Triangular Plate Bending Element for Moderately-Thick and Thin Symmetrically Cross-Ply Laminated Plates
A shear locking free three-node triangular plate bending element based on Reissner/Mindlin theory for symmetric general cross-ply laminated plates is developed. The element has total nine...

Ultrasonic Wave Scattering by a Crack in a Composite Plate
A hybrid method is presented for analyzing ultrasonic wave scattering of plane strain waves by a crack in a composite plate. The hybrid method combines a finite element formulation in...

First-Passage Failure Predictions for Yielding Primary-Secondary Systems
Approximate methods are used to investigate the effect of nonnormality (non-Gaussianity) on the time of first-passage failure for a linear secondary system mounted on a yielding primary...

Random Initial Heterogeneity and Degradation in Brittle Materials
The question of implementation of the initial state of the material is addressed. The problem is tackled by assuming random initial values for a relevant variable, within a prespecified...

 

 

 

 

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