Evaluation of Surface Deflection in Automobile Exterior Panel by Curvature Based Method

2011 ◽  
Author(s):  
W. J. Chung ◽  
W. S. Kim ◽  
J. H. Kim ◽  
J. H. Seo ◽  
T. C. Jung
Keyword(s):  
Surface Deflection ◽  
Exterior Panel

Incipient Separation Near Corners

2018 ◽  
Author(s):  
Anatoly I. Ruban
Keyword(s):  
Corner Point ◽  
Analytic Form ◽  
The Body ◽  
Recirculation Region ◽  
Body Contour ◽  
Concave Corner ◽  
Attached Flow ◽  
Surface Deflection ◽  
Interaction Problem ◽  
Incipient Separation

Chapter 4 analyses the transition from an attached flow to a flow with local recirculation region near a corner point of a body contour. It considers both subsonic and supersonic flow regimes, and shows that the flow near a corner can be studied in the framework of the triple-deck theory. It assumes that the body surface deflection angle is small, and formulates the linearized viscous-inviscid interaction problem. Its solution is found in an analytic form. It also presents the results of the numerical solution of the full nonlinear problem. It shows how, and when, the separation region forms in the boundary layer. In conclusion, it suggests that in the subsonic flow past a concave corner, the solution is not unique.

Robust Trimming of Automotive Panels

2007 ◽  
Vol 539-543 ◽  
pp. 423-428 ◽  
Author(s):  
S.F. Golovashchenko
Keyword(s):  
Crack Propagation ◽  
Elastic Support ◽  
Small Radius ◽  
Automotive Body ◽  
Two Measures ◽  
Trimmed Surface ◽  
Automotive Panels ◽  
Exterior Panel

Small pieces of metal are generated during trimming of automotive body panels. Commonly referred to as slivers, these pieces can be imprinted into the surface of stamped panels. This may require metalfinish of every stamped exterior panel. The objective of the paper is to study the influence of trimming conditions on quality of trimmed surface and to modify the trimming process to eliminate slivers and burrs from the trimmed surface. Suggested solution includes two measures: 1) building an elastic support of the offal eliminating bending of the area of the blank being trimmed off; 2) creating the preference of crack propagation from the lower shearing edge by machining a small radius on the upper shearing edge.

Statistical Test of the Distribution of Sea Surface Deflection

1990 ◽  
Vol 7 (1) ◽  
pp. 5-18 ◽  
Author(s):  
A. P. J. Abrahamse ◽  
J. van Heteren ◽  
A. P. Roskam ◽  
J. Bouman
Keyword(s):  
Statistical Test ◽  
Sea Surface ◽  
Surface Deflection

Comparison of Numerical and Experimental “Conical” Flow Fields in Supersonic Corners with Compression and/or Expansion

1977 ◽  
Vol 28 (4) ◽  
pp. 293-306 ◽  
Author(s):  
D A Anderson ◽  
R K Nangia
Keyword(s):  
Flow Field ◽  
Numerical Method ◽  
Three Dimensional ◽  
Solid Surfaces ◽  
Supersonic Stream ◽  
Conical Flow ◽  
Wave Interactions ◽  
Surface Deflection ◽  
Corner Flows ◽  
General Influence

SummaryThe flow field produced by the intersection of two plane solid surfaces in a supersonic stream is a complex interference flow. These flows can be fully compressive, fully expansive or of mixed compression-expansion nature. This paper presents a comparison of the flow field structure in an axial corner obtained experimentally with that predicted numerically by using a shock-capturing finite-difference method. The effect of sweep and surface deflection are evaluated and the general influence of each is presented for the three classes of corner flows. The results of this study show that the numerical method is a valuable aid in understanding the flow structure for simple configurations. In addition confidence in the numerical method is gained for use in solving the more general three-dimensional configurations where the flow is non-conical and several wave interactions may be present.

Viscous flow computations of aircraft with changing control surface deflection using unstructured dynamic meshes

2006 ◽  
Vol 52 (8) ◽  
pp. 925-940 ◽  
Author(s):  
Mitsuhiro Murayama ◽  
Yasushi Ito ◽  
Kazuhiro Nakahashi ◽  
Kisa Matsushima ◽  
Toshiyuki Iwamiya
Keyword(s):  
Viscous Flow ◽  
Control Surface ◽  
Surface Deflection

Adhesive Contacts for Graded-Elastic Coatings Using Fourier Series Decomposition

2011 ◽  
Author(s):  
S. J. Chidlow ◽  
W. W. F. Chong ◽  
M. Teodorescu ◽  
N. D. Vaughan
Keyword(s):  
Fourier Series ◽  
Analytic Solution ◽  
Adhesive Contact ◽  
Solution Technique ◽  
Control Case ◽  
Principal Stresses ◽  
Pressure Distributions ◽  
Surface Deflection ◽  
Elastic Layers ◽  
Adhesive Contacts

We propose a semi-analytic solution technique to determine the subsurface stresses and local deflections resulting in an adhesive contact of graded elastic layers. Identical pressure distributions, typical for a Maugis parameter λ = 1, were applied to a range of graded elastic coatings. The principal stresses and surface deflection in both regions (graded elastic layer and substrate) are computed in terms of Fourier series. This control case has the advantage that the response of different coatings can be easily monitored and compared.

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