# Theory of Chaos and Radionuclide Distribution

Damage Dependent Micromechanics in Metal Matrix Composites

*A computational approach is used herein to model the effects of processing induced thermal residual stresses on radial, hoop, and shear stresses at the fiber/matrix interface in a continuous...*

Micromechanical Characterization of Damage-Plasticity in Metal Matrix Composites

*A micromechanical theory of damage mechanics and plasticity is proposed for fiber-reinforced metal matrix composites. The composite system is assumed to consist of elastic, continuous...*

Nonlinear Behaviour of Schneebeli Packings

*We present some experimental proofs of the influence of the disorder of contacts on the mechanical (non-local) behaviour of packings of cylinders. In particular, this disorder is responsible...*

On the Diffusional Stress Transmission

*A probabilistic diffusional mechanism for the propagation of intergranular forces has been formulated as a set of three mathematical assumptions. The equilibrium equations are complemented...*

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,...*

Fracture Toughness of DMMC

*The fracture toughness of discontinuous metal matrix composites (DMMC) is always less than the fracture toughness of the matrix, in the same heat treatment or annealed condition. If a...*

Fracture Toughness Model of Fiber Reinforced Ceramics

*This paper addresses the fracture resistance mechanism in fiber reinforced ceramics, and focuses attention on the specific effects associated with the nonlinear nature of the fiber pullout...*

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,...*

Debonding of a Inhomogeneity from a Plastic Matrix

*Inclusion debonding is addressed through the formulation and solution of the planar elastic and elastic uniform plastic problems. These problems are variants of the standard transformation...*

Refined Analysis of Load Distribution Factors for Bridges

*This paper presents a new approach for calculating the distribution factors for slab-on-girder bridges. This method considers the coupling of longitudinal and transverse effects. The governing...*

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...*

On the Bifurcation of Elasto-Plastic Crystals During Multiple Slip

*Conditions for the localization of deformation in elasto-plastic crystals experiencing multiple slip are discussed using multisurface plasticity theory. In particular, some important characteristics...*

The Initiation of Bifurcations and Localization in Damaging Materials

*Criteria for diffuse and discontinuous bifurcations have previously been developed and used to investigate the initiation of necking and localization in elastic-plastic materials. In this...*

Softening Models for Concrete: Stability and Uniqueness

*A microstructurally-based, numerically oriented, fracture-induced softening model for concrete is presented. Rate-dependent evolution equations for microcrack nucleation, growth, and coalescence...*

Damage Mechanics Modeling of the Cyclic Behavior of Plain Concrete

*The sudden stiffening behavior of concrete under cyclic loading is discussed and the available experimental investigations to delocalize damage is reviewed. A discussion on the applicability...*

Turbulence, and Energy Loss, at Combining Pipe Junctions

*Efforts to measure and describe the loss of energy at 90° sharp-edged junctions are described. The work is focussed on energy losses at discharge and area ratios for which there are no...*

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...*

Return to search