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Showing 1 to 15 of 15 for “"stress dependence"”.
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Stress dependence of the magnetic properties of steels
… and mechanical changes. Variations in applied stress, composition, and geomrtry will, either alone or in combination with each other, cause the magnetization process to change. The primary way to monitor changes in the magnetization process is to run the material or component of interest …
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Experimental study of stress dependence of porosity and permeability in sandstones, carbonates, and fractured rocks
Includes bibliographical references (leaves 59-61).
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Topics in the Theory of Semiconductors: I. Novel Semiconductors. II. Uniaxial Stress Dependence of Deep Impurities
… and chapter 4 deals with the uniaxial stress dependence of deep substitutional impurity levels in semiconductors.
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Topics in the theory of semiconductors: I. Novel semiconductors II. Uniaxial stress dependence of deep impurities
… and chapter 4 deals with the uniaxial stress dependence of deep substitutional impurity levels in semiconductors. Chapter 1: The electronic energy band structure and deep substitutional impurity levels for metastable are predicted with a nearest-neighbor, tight-binding model. Gel_xS~ is …
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Multiaxial creep models for 304 stainless steel
… [degrees] C (1100 [degrees] F) under variable stresses of pure tension, pure torsion and combined tension and torsion. One was based on isotropic strain hardening concept and the other employed a state variable (kinematic strain hardening). The creep equations and the constants were determined …
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Stress-mediated reaction pathways for dislocation nucleation in copper
… in the framework of transition state theory as a stress-mediated, thermally activated process. We have used reaction pathway sampling methods and well-fit empirical potentials to determine the stress-dependent behavior of and atomistic mechanisms for dislocation nucleation at stresses much lower …
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The Influence of Substructure and Dislocation Mobility on the Creep Properties of Some Single Phase Metals
… the form of their strain-time curves and in the stress dependence of the strain rate. At present, it is not possible to predict theoretically the mechanical responses of a given alloy.</p> <p>This thesis is concerned with the deformation of pure copper, copper-5 wt.% tin and iron-3¼ wt.% silicon …
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The phase transition of the rubidium halides
… pressure, the effects of non-hydrostatic stress, energy differences, and the volume changes at the transition in the Rubidium Halides. Although we agree with an earlier statement by Tosi and Fumi that it is essential to use crystal data over a wide range of pressures in determining the …
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Comparison of wind stress algorithms, datasets and oceanic power input
… known that it is the air-sea momentum flux (wind stress) that actually drives the ocean circulation, especially the upper layer circulation. Due to the difficulties of directly measuring the wind stress, different algorithms were proposed to relate the wind stress with the wind velocity and other …
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The durability of adhesive joints: an engineering study
… a few additional features in the model. The stress dependence of solubility as well as the non-fickian driving forces contributing to mass transport are predicted from the Flory-Huggins theory. Experimental validation of the concentration dependence and temperature dependence of the diffusion …
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Application of numerical methods to dislocation modeling of creep
… as functions of their locations, applied stress, and glide and climb mobilities. Dual-order, error-estimating, adaptive stepsize Runge-Kutta methods of Verner and of Fehlberg are used to solve the systems of ODE's. Predictions for the behavior of the stress exponent as a function of stress …
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Excitons in cuprous oxide: high mobilities and strain confinement
… .An externally applied inhomO'::feIl-""'Ous stress gradient was used to provide the motive force for the mobility measurement. Very large values of D (~ 1000 2 7 2 cm Is) and 11 (-10cm /eV-s) were measured at a bath temperature of 1.2 K. Both these parameters exhibited anomalous temperature …
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Characterisation of mechanical loss in fused silica ribbons for use in gravitational wave detector suspensions
… shown clear evidence that there is no intrinsic stress dependence of the material loss of fused silica and has given further evidence that the majority of loss in the fibres comes from a thin highly dissipative layer on the surface. The strength of ribbon fibres has been shown to be sufficient to …
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The effect of stress on the luminescence spectrum of irradiated silicon
… containing oxygen. Data on the temperature and stress dependence of the luminescence bands have been taken in order to obtain information on the type of defects and the optical transitions involved. The narrow line widths observed for the zerophonon lines show that the transitions do not involve …
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Experimental investigation and constitutive modeling of marine clay
… A new general cross-anisotropic model for the stress-dependent elastic moduli is presented. In agreement with experimental evidence, the model considers that the Young's modulus and the shear modulus of soil depend on the state of stress, while the three Poisson's ratios are practically …