# Concrete Surface Characterization Using Optical Metrology

*The displacement of the surface of a concrete specimen is measured as it cures using an optical method. This method, known as optical metrology, is one in which a line is projected onto...*

Strain and Stress Measurements in Pavements

In-situ Stress and Strain Measurements in Dynamically Loaded Asphalt Pavement Structures

Field Evaluation of Strain Gauges in Asphalt Concrete Pavements

Micromechanics and Effective Properties of Elastic Particulate Composites

*A new micromechanical framework is proposed to investigate the effective mechanical properties of elastic particulate multiphase composites. Exact ensemble-volume averaged field equations...*

Large Deformation Elastic Behavior of Low-Density Solid Foams

*A strain energy function that describes the nonlinear elastic response of a three-dimensional open-cell foam is developed. A tetrahedral unit cell containing four half-struts that join...*

Rate-Dependent Plasticity Representation for Energy-Absorbing Materials

*A three dimensional rate-dependent plasticity constitutive model is developed for rigid polyurethane foams. In the model, the material is decomposed into skeleton and solid matrix from...*

Use of Hierarchical Lattices for Predicting the Fluid or Stress Transfer in Concrete

*Hierarchical lattices are used to study the influence of local disorder on the transfer of properties (stresses, strains, permeability) from the micro-scale to the macro-scale. They are...*

Comparative Evaluation of Plasticity Theories Against Tension-Torsion Test at Finite Strain

*This paper investigates and evaluates three hardening theories against a variety of nonproportional loading experiments on tubes made of annealed copper. It was concluded that the isotropic...*

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...*

Computerized Tomographic Analysis of Fluid Flow in Fractured Tuff

*The purpose of this summary is to demonstrate the usefulness of X-ray computerized tomography to observe fluid flow down a fracture and rock matrix inhibition in a sample of Bandelier...*

Direct Tensile Test: Stability and Bifurcation

*Unnotched specimens of quasibrittle materials that exhibit post-peak strain softening do not deform symmetrically in a direct tension test. The phenomenon (which is similar to the recently...*

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...*

Strain-Based Damage Deactivation in Concrete

*Motivated by the 'mode I' microcrack opening and closing mechanism, a procedure for the deactivation of the damage is developed. Strain based projection operators are used to negate the...*

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...*

Mechanics of Growing Deformable Solids: A Review

*An attempt is undertaken to summarize the contemporary knowledge in mechanics of deformable solids of accruing mass. A general mathematical model of an abstract growing deformable solid...*

Estimating Damage and its Influence on Fracture Toughness

*To estimate damage in a quantitative manner, a technique used whereby six values of linear strain are measured on a material element as a function of hydrostatic pressure. The high precision...*

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