Results 251 to 260 of about 654,561 (303)
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Engineering Fracture Mechanics, 1995
Abstract The importance of retaining the second, constant stress term of the series expansion for local stress is demonstrated both analytically and numerically. It is shown how the standard singular expressions for the stress and displacement field in the vicinity of the crack tip need to be corrected.
Peter M. Haefele, James D. Lee
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Abstract The importance of retaining the second, constant stress term of the series expansion for local stress is demonstrated both analytically and numerically. It is shown how the standard singular expressions for the stress and displacement field in the vicinity of the crack tip need to be corrected.
Peter M. Haefele, James D. Lee
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A constant stress creep testing machine
Journal of Biomechanics, 1983Abstract A device is described which permits loading of highly extensible materials at constant stress while monitoring extension as a function of time. As presented, the device accommodates extensions of up to four times resting length, loads from 0.1 to 10 N, and specimen lengths from 1 to 5 cm.
S, Vogel, M N, Papanicolaou
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A strip with constant stresses on the cut: Exact solutions
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2022AbstractWe construct exact solutions of three boundary value problems in the theory of elasticity for an infinite strip with a central transverse cut on which constant normal stresses are specified (even‐symmetric deformation). We consider three variants of homogeneous boundary conditions on the strip sides: (1) free sides, (2) firmly clamped sides ...
Mikhail D. Kovalenko +3 more
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Hygrothermal stresses in a solid: Constant surface stress
Journal of Applied Physics, 1993The hygrothermal stresses in a solid with a boundary condition of constant surface stress have been investigated. Three simple geometries: thin slab, sphere, and cylinder, have been considered. The effect of geometry on temperature distribution and moisture absorption inside the solid from small to large follows the sequence: thin slab, cylinder, and ...
J. L. Chu, Sanboh Lee
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Constant-Stress Inclusions in an Elastic Plate
Mathematics and Mechanics of Solids, 2000A set of perfectly bonded inclusions in an elastic plate is considered. We employ the Kolosov-Muskhelishvili potentials to identify the interface shapes which provide a constant stress field inside the inclusions under a uniform loading at infinity. Coupled inequalities are explicitly derived for a single inclusion to prove that the only such contour ...
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Constant Stress Creep Apparatus
Review of Scientific Instruments, 1956A simple creep apparatus for approximating a constant stress in tensile specimens of large cross sections, where large applied loads are required, is described. The apparatus consists of a lever with a large built-in mechanical advantage, together with means for removal of incremental weights from the applied load.
Raymond C. Boettner, W. D. Robertson
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Effects of constant voltage and constant current stress in PCBM:P3HT solar cells
Microelectronics Reliability, 2015Abstract The aim of this work is the investigation of forward and reverse bias stress effects, cell self-heating and annealing in roll coated organic solar cells with PCBM:P3HT active layer. In reverse bias stress cells show a constant degradation over time.
Andrea Cester +9 more
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On the creep testing of rocks at constant stress and constant force
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1972Abstract It is demonstrated by constant stress and constant-force creep experiments, performed on wet Solenhofen limestone at room temperature with 600 bars confining pressure, that the form of the creep curve for rocks is sensitive to stress changes due to changes in the cross-sectional area of the specimen during deformation.
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Constant-Stress Measurements of the Hardening of Soft Materials
Nature, 1949THE use of sphere indentation hardness tests is by no means confined to metals, experiments having been reported on pitch and ‘Plasticine'1, plastics2,3, rubber4 and cheese5, and in some of these investigations the relationship between depth of indentation (Δ) and load has been studied.
G W S, BLAIR, M, BARON
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Elongational flow of polymer melts at constant strain rate, constant stress and constant force
AIP Conference Proceedings, 2013Characterization of polymer melts in elongational flow is typically performed at constant elongational rate or rarely at constant tensile stress conditions. One of the disadvantages of these deformation modes is that they are hampered by the onset of “necking” instabilities according to the Considere criterion.
Manfred H. Wagner +1 more
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