Results 261 to 270 of about 94,387 (307)
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Distortion control in welding by mechanical tensioning
Science and Technology of Welding and Joining, 2007This paper investigates the potential of mechanical tensioning (MT) to reduce the magnitude of residual stresses in welds and to eliminate buckling distortion. Both friction stir (FSW) and arc welds have been produced from the aluminium alloy AA2024, with different levels of tensile stress applied along the weld line either during or after welding ...
Price, DA +8 more
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Mechanically Distorted Supersonic Boundary Layers
25th AIAA Applied Aerodynamics Conference, 2007θ ) supersonic turbulent boundary layers were examined. Large localized distortions ( d = -0.5 to 0.4) were generated from the shock and expansion structure produced by diamond roughness elements. Weak ( dmax = 0.05) and strong global favorable pressure gradients ( dmax = 0.25) were studied.
Isaac Ekoto +3 more
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Balancing Mechanisms of Distortion to Yield Distortion-free/Shape Stable Composites
Journal of Reinforced Plastics and Composites, 2009The underlying mechanisms of manufacturing distortion in composite components have been suggested to be anisotropy, material property gradients, and part-tool interactions. These mechanisms have been sub-divided into those that result in shape change with changing temperature (thermoelastic) and those that are one-time-only effects (non-thermoelastic),
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Mechanical distortions in advanced optical reticles
SPIE Proceedings, 1998Finite element (FE) models have been created to investigate mechanical distortions associated with mask blank fabrication and mounting in a horizontal orientation. A modal analysis was completed to quantify the natural frequencies for the mask blank as a predictive tool for possible vibration prevention or control. By modeling the substrate with layers
Andrew R. Mikkelson +4 more
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A proposed mechanism for rapid adaptation to spectrally distorted speech
The Journal of the Acoustical Society of America, 2015The mechanisms underlying perceptual adaptation to severely spectrally-distorted speech were studied by training participants to comprehend spectrally-rotated speech, which is obtained by inverting the speech spectrum. Spectral-rotation produces severe distortion confined to the spectral domain while preserving temporal trajectories. During five 1-hour
Mahan, Azadpour, Evan, Balaban
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Effect of distortion on the mechanical properties of newborn piglet lung
Journal of Applied Physiology, 1985During breathing the relatively high chest wall-to-lung compliance ratio of the newborn favors distortion of the respiratory system. In this study we have examined the effect of lung deformation, generated by a hydrostatic pleural surface pressure gradient, on the static (Cstat) and dynamic (Cdyn) compliance of the isolated newborn piglet lung.
K J, Sullivan, J P, Mortola
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Analysis of Thermo-Mechanical Distortions in Sliding Components: An ALE Approach
STLE/ASME 2008 International Joint Tribology Conference, 2008A numerical technique for analysis of heat transfer and thermal distortion in reciprocating sliding components is proposed. In this paper we utilize the Arbitrary Lagrangian Eulerian (ALE) description where the mesh displacement can be controlled independently from the material displacement.
Owczarek, P., Geijselaers, H.J.M.
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Local Lattice Distortion and Mechanism of Superconductivity
1993Anomalous lattice behavior near the onset of superconductivity has been observed by various experimental methods for a number of high temperature superconducting oxides. However, some other probes do not detect such an anomaly. Moreover, its relevance to the mechanism of superconductivity has been controversial. Based upon our pulsed neutron scattering
T. Egami, S. J. L. Billinge
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Distortional mechanics of restrained steel sections
Journal of Constructional Steel Research, 2010Abstract This paper presents an overview of the mechanics of distortion in members which have restrained thin-walled steel sections. First, the basic features that characterize the distortion of thin-walled sections under compression and/or bending are explained and the generally adopted kinematical assumptions are presented and discussed.
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Biochemical consequences of mechanical forces generated by distention and distortion
Journal of the American Academy of Dermatology, 1989This review includes a number of concepts: (1) mechanical forces are transmitted to cell membranes by adhesion complexes between solid elements in the extracellular environment and the cytoskeleton; (2) the adhesion complexes require inhibition of proteases to maintain their adhesion; and (3) hydrostatic pressure is a mechanical stress on solid ...
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