The Application of a Wall Interference Correction Method to Flat Plate Models

2003 ◽  
Author(s):  
Norbert Ulbrich ◽  
Kevin Cooper
Keyword(s):  
Flat Plate ◽  
Correction Method ◽  
Interference Correction ◽  
Plate Models

Extensions to Maskell’s theory for blockage effects on bluff bodies in a closed wind tunnel

2001 ◽  
Vol 105 (1050) ◽  
pp. 409-418 ◽  
Author(s):  
J. E. Hackett ◽  
K. R. Cooper
Keyword(s):  
Wind Tunnel ◽  
Flat Plate ◽  
Correction Method ◽  
The Other ◽  
Bluff Bodies ◽  
Low Speed ◽  
Test Conditions ◽  
Lift And Drag ◽  
Low Speed Wind Tunnel

Abstract Extensions to Maskell’s original correction method, developed over several years, are consolidated and designated ‘Maskell III’. The procedures were applied to dedicated tests on a family of flat-plate wing models in a small, low-speed wind tunnel at NRC. Test conditions included angles of attack from -10° to 110° and models of up to 16% of tunnel area. Off-centre tests were included with model-to-wall distances down to 0.72 chords. Corrected lift and drag data correlated well between models of different sizes and at different offsets from the tunnel centreline. Comparisons are made with corrections using the pressure-signature and two-variable methods, emphasising post-stall conditions. These showed that the ‘Maskell III’ procedures, which require minimal input, correlated as well as the other methods for most model sizes and positions in the tunnel.

Tests of One- and Two-Story Flat Plate Models

1974 ◽  
Vol 100 (3) ◽  
pp. 513-531
Author(s):  
C. Trevor Harnden
Keyword(s):  
Flat Plate ◽  
Plate Models

Modal characterization of composite flat plate models using piezoelectric transducers

2016 ◽  
Vol 79 ◽  
pp. 16-29 ◽  
Author(s):  
É.L. Oliveira ◽  
N.M.M. Maia ◽  
A.G. Marto ◽  
R.G.A. da Silva ◽  
F.J. Afonso ◽  
...  
Keyword(s):  
Flat Plate ◽  
Piezoelectric Transducers ◽  
Plate Models

Comparative Study on Stress Intensity Factors for Surface Cracks in Welded Joint and Flat Plate by Using the Influence Function Method

2020 ◽  
Author(s):  
Phyo Myat Kyaw ◽  
Osawa Naoki ◽  
Gadallah Ramy ◽  
Tanaka Satoyuki
Keyword(s):  
Stress Distribution ◽  
Flat Plate ◽  
Welded Joints ◽  
Influence Function ◽  
Function Method ◽  
Welded Joint ◽  
Intensity Factors ◽  
Crack Face ◽  
Influence Function Method ◽  
Plate Models

Abstract Welding is an effective method for joining metallic structures which are very common in the construction of ships and offshore platforms. However, welded joints are prone to fatigue failure under cyclic loading due to the associated high residual stresses. In order to assess the fatigue crack propagation (FCP) accurately, precise evaluation of stress intensity factors (SIFs) is a key parameter. The residual stress distribution on the crack face of welded joints is usually non-uniform and also depends on boundary conditions. Therefore, an efficient technique is required to calculate SIFs for welded joints under non-uniform stress distribution. In this study, SIFs of semi-circular surface cracked welded joints are calculated by using the influence function method (IFM). The IFM has been introduced as an efficient method to evaluate SIFs under arbitrary stress distribution. The influence coefficient databases (ICDB) are developed for welded joints and flat plate models using IFM in this study. As the crack face traction (CFT) integral is employed in this developed influence coefficients (IC), the SIFs given by IFM are more accurate compared to the previously established solutions without CFT-integral. The ICDB and SIFs evaluated by using welded joint and flat plate models are compared and discussed. This study reveals the difference between ICDB of flat plates and welded joints, and estimation error of calculated SIFs for welded joints by using flat plate ICDB.

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