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Showing 1 to 20 of 20 for “"Strength distribution"”.
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In-situ Fiber Strength Distribution in NextelTM 610 Reinforced Aluminum Composites
… NextelTM fibers affected in any way that their strengthening contribution to the composite is reduced? From experimentation and statistical analysis, a strength distribution of pre-processed NextelTM 610 fibers is formed and an empirical correlation is developed relating strength to the observed …
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Modeling the Residual Strength Distribution of Structural GFRP Composite Materials Subjected to Constant and Variable Amplitude Tension-Tension Fatigue Loading
… of a simulation to predict the remaining strength of structural composites subjected to variable fatigue loading and environmental exposure. The results of this simulation can then be used in LRFD to determine appropriate material factors of safety for engineering design applications. The …
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Sensitivity Study on Modification of Vertical Distribution of Strength and Stiffness in Wood Shear Wall Building Models
… study of the influence of varying story strength on the seismic performance of multi-story wood-frame shear wall buildings. In the prior FEMA P695 studies of these buildings, the non-simulated collapse limit-state was exceeded primarily in the first story. This observation raised interest …
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Reliability Assessment of Optical Fibers under Tension and Bending Loads
… test. The proof test will alter the fiber's strength distribution for all subsequent processing and applications. Thus it is critical to know the fiber strength distribution after proof test (post-proof strength distribution). It is generally assumed that the proof test truncates the strength …
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Measurement of the isovector giant quadrupole resonance in 208Pb using eleastic polarized photon scattering
… resonance and the underlying electric dipole strength. The gross features of the IVGQR strength distribution were obtained in a relatively model independent manner. An isovector giant quadrupole resonance was observed at an excitation energy of 20.1±0.5 MeV, with a width of 6.3±0.5 MeV, and an …
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Studies of structure cracking and fracture strength of E-glass fibres using acoustic emission.
… developed to permit the determination of the strength distribution of E-glass fibre strands containing as many as 4,000 filaments. This technique is novel in that it allows fast data acquisition and provides the accurate load, location and time of fracture of each filament. The design also …
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Interaction cross sections needed for simulation of secondary electron emission spectra from thin metal foils after fast proton impact
… cross section into the generalized oscillator strength and kinematic factors. The generalized oscillator strength or Bethe surface of the medium is obtained by using a semi-empirical optical oscillator strength distribution published in the literature and an extension algorithm based on the …
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Reverse proof loading as a means of quality control in lumber manufacturing
The determination of the strength distribution of a given structural grade of lumber from any chosen mill is of growing concern to the lumber industry. Lumber in the lower range of strength values is of prime interest. A reverse proof loading procedure, applied in bending, appears to result in a …
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Evaluation of Analysis Methods used for the Assessment of I-walls Stability
… analysis to obtain the vertical total stress distribution in the vicinity of the I-wall and to calculate pore pressures proved to be an effective enhancement. The influence of overconsolidation on the shear strength distribution of the foundation soils was examined as well.
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Inverse Boundary Element/genetic Algorithm Method For Reconstruction O
… while the temperature and surface heat flux distributions are unknown at the film cooling hole/slot walls. The latter are determined in an iterative process by developing two approaches. The first approach, developed for 2d applications, solves an inverse problem whose objective is to adjust …
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Algal resource depression by macro-invertebrate herbivores in a chalk stream: An empirical approach
… relatively little empirical data quantifying the strength of these algal-herbivore interactions, or how these vary with herbivore identity, size, and biofilm physiognomy. Interactions across a diverse herbivore guild were investigated in a chalk stream, using mesocosms to determine the …
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Improving fatigue life predictions: theory and experiment on unidirectional and crossply polymer matrix composites
… response of the critical element. The residual strength of the critical element may then be continuously evaluated to predict failure. The statistical nature of material strength is accounted for by forcing the critical element SN Curve to yield a specimen initial strength distribution in …
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Synthesis and characterization of in situ whisker-reinforced glass-ceramics
… flexural strength is improved from 72 to 134 MPa. Fracture toughness, K<sub>Ic</sub>, is increased from the 1.1 to 1.6 MPa·m<sup>1/2</sup> due to crack deflection by the Ti0₂ whiskers. In situ Ti0₂ whisker-reinforced glass-ceramic exhibits rising fracture …
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Electroexcitation of the giant resonance of 17O
… centred at 22 - 23 MeV excitation, with strength extending down to 10 - 12 MeV excitation. Some fine structure is observed which correlates well with the positions of previously observed levels. A particle-hole model with harmonic oscillator wavefunctions and Kuo-Brown residual …
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A statistical analysis of the fatigue behaviour of single and multi-spot welded joints.
… values for the standard deviation of the fatigue strength distribution, and a marginal increase in the experimentally determined mean fatigue strength, when compared to the values predicted by the model. This difference was attributed to a small increase in the width per spot weld in the …
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FLUID FILTRATION FROM CAPILLARY NETWORKS (MICROCIRCULATION, MATHEMATICAL MODELING).
… realistic topology, and calculates the spatial distribution of extravascular pressure. In this model, the capillaries are represented by a superposition of sources and sinks, resulting from a D'Arcy's Law description of flow in tissue of uniform fluid conductivity. The combination of this …
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Micromechanics-Based Strength and Lifetime Prediction of Polymer Composites
… in this dissertation is an effort to predict the strength and rupture lifetime of a unidirectional carbon fiber/polymer matrix composite using micromechanical techniques. Sources of material variability are incorporated into these models to predict probabilistic distributions for strength and …
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Allowable bending strength enhancement of 2 by 4 lumber by tension and compression proofloading
… bending and tension, and bending and compression strength of lumber. Because of this correlation, improvement in bending strength may be realized from proofloading in tension or compression. The data utilized in a reliability analysis was from Galligan et al. (1986) that characterized the …
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Searches for Radio Transients using the Long Wavelength Array
… 0.035% of the total number of pulse periods. The strength and rate of giant pulses is less than observed by others at ~100 MHz. The probability distribution of the cumulative pulse strength is a power law, but deviates from the Gaussian distribution of normal pulses. These results suggest PSR …
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A Theory and Analysis of Planing Catamarans in Calm and Rough Water
A planing catamaran is a high-powered, twin-hull water craft that develops the lift which supports its weight, primarily through hydrodynamic water pressure. Presently, there is increasing demand to further develop the catamaran's planing and seakeeping characteristics so that it is more …