Results 291 to 300 of about 3,085,452 (343)
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Anisotropic grain growth with pore drag under applied loads
Materials Science and Engineering: A, 2005Abstract In the final stage of sintering of ceramics, residual pores co-evolve with grain boundaries because of incomplete densification. Their interactions coupled with external loads are critical to the microstructural evolution of structural ceramics.
X.N. Jing +3 more
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OPTIMUM LOADING ON NONPLANAR WINGS AT MINIMUM INDUCED DRAG
1969Abstract : A numerical technique was developed for computing the optimum spanwise load distribution on nonplanar wings of arbitrary shape. Munk's criterion for minimum induced drag was used. The problem is solved in the two- dimensional Trefftz plane.
Robert E. Boyle, John L. Loth
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Drag loading of circular cylinders inclined in the along-wind direction
Journal of Wind Engineering and Industrial Aerodynamics, 2007The drag wind loading on the stay cables of long cable-stayed bridges is discussed based on two recent long-span cable-stayed bridge designs. For wind along the bridge, the available design literature on cable drag coefficients either do not cover the actual cable configurations or are too conservative.
Sanne Poulin, Allan Larsen
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Drag and Inertia Loads on Cylinders
1990Oscillating cylinder results are compared with wave tank results for both regular and random waves and the agreement is found to be quite good. Also, oscillating cylinder results are found to be well-represented by a simple wake model.
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Multivariate Hermite Expansion of Hydrodynamic Drag Loads on Tension Leg Platforms
Journal of Engineering Mechanics, 1993In this paper, a new method is proposed for the expansion of nonlinear drag forces in terms of multivariate Hermite polynomials correct up to the second order. The drag‐force formulation includes the effect of instantaneous wave surface profile and it caters for the waves and currents approaching from any arbitrary direction with respect to the ...
Yousun Li, A. Kareem
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Positive Tail Loads for Minimum Induced Drag of Subsonic Aircraft
Journal of Aircraft, 1978By applying Prandtl's relation for the induced drag of a biplane to typical wing-tail combinations, it can be shown that the minimum induced drag occurs with a positive tail upload. This fact has been overlooked because the reduction in the total induced drag by a tail download was overestimated by using the total downwash of the wing on the tail ...
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Use of Drag Modulation to Reduce Deceleration Loads During Atmospheric Entry
ARS Journal, 1959Abstract : A study is made of the use of drag modulation to reduce deceleration loads during atmosphere entry. The design of a space vehicle which must be capable of entering the earth's atmosphere involves, among other things, the consideration of the accuracy with which its landing point can be predicted, the maximum deceleration loads which the ...
RICHARD L. PHILLIPS, CLARENCE B. COHEN
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Reducing Induced Drag and Maneuver Loads by Active Aeroelastic Alteration
16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2015Induced-drag reduction and maneuver load relief are two recent benefits of active aeroelastic wing technology. Judiciously deflecting wing-edge flaps can alter an unfavorable force distribution aeroelastically. Active distribution matching control to reduce induced drag and active load alleviation control by reducing wing bending moments are such ...
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Studies on Relation between Drag Load and Time of Pile Foundation
AIP Conference Proceedings, 2009The development of negative skin friction experiences two stages. At the first stage, it is mainly controlled by the relative displacement between soil and pile, and at the second stage mainly controlled by the increasing of soil strength caused by consolidation.
Xiao Jun-hua +3 more
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Drag Force on Single Piles in Clay Subjected to Surcharge Loading
International Journal of Geomechanics, 2006Piles driven into clay are often subjected to indirect loading as a result of the surcharge applied on the surrounding area. During the drained period, both the piles and the soil undergo downward movements caused by the axial and the surcharge loading, respectively. Depending on the relative movement of the pile–soil system, positive and negative skin
Adel M. Hanna, Ali Sharif
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