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Stress Transfer Within Granular Geomaterials
Local stresses within granular materials are random variables whose variance depends on the size of the elementary surface considered. This paper shows that this 'mechanical scale effect'...

Random Aspect of the Stress Inside Granular Media
Micromechanics of granular media arose from the necessity of a better understanding of the relationship between the global behaviour of such materials and the physical phenomena which...

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...

Wavelet Transform Analysis of Several Transient or Nonstationary Phenomena in Engineering Mechanics
Several examples of the use of a wavelet transform in the analysis of transient events in mechanical systems are provided. The transform has the advantage over other transient analysis...

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...

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...

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...

Mechanical Response of Cellular Materials Used in Waste Shipping Containers
Material behavior of impact limiters such as aluminum honeycombs and polyurethane foams has been studied experimentally. Four densities of aluminum honeycombs were tested: 3, 8, 12, and...

Stochastic Response of a Caster-Mounted System
The response statistics of a caster-mounted system with white noise excitation are estimated using the generalized equivalent linearization method. The displacement and velocity covariances...

Actively Controlled P-F Based Sliding Structures
This study summarizes about three years of research effort related to active control of sliding structures to both harmonic and strong earthquake type motions. This is the first time such...

Dynamic Response of an Infinite Beam Supported by a Fluid
The objective of this study is to investigate the dynamic response of an infinite beam supported by a fluid on one side, and subjected to dynamic loading on the other side. The fluid underneath...

Wind Effect on Oblique Motion of Two Bodies in a Uniform Flow
The wind effect on the general translational motion of a circular cylinder through an inviscid and incompressible fluid, conveyed by a uniform flow at infinity, in the vicinity of another...

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...

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...

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...

Three-Dimensional Thermal Jump in Stratified Cooling Channel
This study is concerned with basic properties of three-dimensional thermal jumps. Temperature measurements obtained in three-dimensional thermal jumps are presented. The jumps analyzed...

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...

General Mechanism of Turbulence
By considering the vortex structures of turbulence and using the concept and theory of the pulsative convection and diffusion of instantaneous vorticity in a viscous fluid motion, the...

 

 

 

 

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