Static Strength Comparison of Riveted versus Friction Stir Welded Stiffened Panels

2006 ◽  
Author(s):  
Bryan Tweedy ◽  
Scott Sellmeyer ◽  
Adam Jahn ◽  
Dwight Burford
Keyword(s):  
Static Strength ◽  
Stiffened Panels ◽  
Friction Stir

Compression Buckling Behavior of 7075-T6 Aluminum Skin Stiffened Panels Fabricated by Friction Stir Welding

2005 ◽  
Author(s):  
Anil K. Patnaik ◽  
Josh Schurger ◽  
Annicia Streete ◽  
Casey D. Allen ◽  
William J. Arbegast
Keyword(s):  
Friction Stir Welding ◽  
Stiffened Panels ◽  
Friction Stir ◽  
Buckling Behavior

Effect of stirring time on the mechanical behavior of friction stir spot weld of Al 6061-T6 lap-shear configuration

2018 ◽  
Vol 233 (10) ◽  
pp. 3583-3591 ◽  
Author(s):  
Amirreza Shahani ◽  
Ali Farrahi
Keyword(s):  
Mechanical Behavior ◽  
Failure Modes ◽  
Static Strength ◽  
High Load ◽  
Welding Condition ◽  
Friction Stir ◽  
Al 6061 ◽  
Lap Shear ◽  
Low Load ◽  
Stirring Time

The effect of five different stirring times of friction stir spot welding on lap-shear specimens of Al 6061-T6 alloy has been experimentally analyzed. The welding condition with 2 s of stirring shows the optimum mechanical behavior in comparison to the others. The static strength and fatigue behavior of the joint are justified using the microhardness profiles. The static results prove that the increase of stirring time beyond the 2 s case has little effect on improving the static strength. The fatigue results reveal two different failure modes, which are shear fracture at high load levels and transverse crack growth at low load levels. At medium load levels, although the final failure is similar to high load levels, the transverse growth of the crack outside the welding zone, just like low load levels, is also observed.

scholarly journals Buckling/post-buckling strength of friction stir welded aircraft stiffened panels

2012 ◽  
Vol 228 (2) ◽  
pp. 178-192 ◽  
Author(s):  
A Murphy ◽  
T Ekmekyapar ◽  
M Özakça ◽  
K Poston ◽  
G Moore ◽  
...  
Keyword(s):  
Stiffened Panels ◽  
Buckling Strength ◽  
Friction Stir ◽  
Post Buckling

scholarly journals Experimental and Numerical Investigations of Thin-Walled Stringer-Stiffened Panels Welded with RFSSW Technology under Uniaxial Compression

Materials ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 1785 ◽  
Author(s):  
Andrzej Kubit ◽  
Tomasz Trzepiecinski ◽  
Łukasz Święch ◽  
Koen Faes ◽  
Jan Slota
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Testing Machine ◽  
Image Correlation ◽  
Uniaxial Tensile ◽  
Stiffened Panels ◽  
Friction Stir ◽  
Uniaxial Tensile Testing ◽  
First Case ◽  
Thin Walled

Many aircraft structures are thin walled and stringer-stiffened, and therefore, prone to a loss of stability. This paper deals with accurate and validated stability analysis of the model of aircraft skin under compressive loading. Both experimental and numerical analyzes are conducted. Two different methods of joining panel elements are considered. In the first case, the panel is fabricated using rivets. In the second variant, the refill friction stir spot welding technique is used. Both types of panels are loaded in axial compression in a uniaxial tensile testing machine. The geometrically and physically nonlinear finite element analyzes of the panels were carried out in ABAQUS/Standard. The Digital Image Correlation measurement system ARAMIS has been utilized to monitor the buckling behavior and failure mode in the skin-stringer interface of the stiffened panels. The results of experiments and the digital image correlation system are presented and compared to the numerical simulations.

Fatigue Crack Growth in Integrally Stiffened Panels Joined Using Friction Stir Welding and Swept Friction Stir Spot Welding

2008 ◽  
Vol 5 (4) ◽  
pp. 101568 ◽  
Author(s):  
Dwight A. Burford ◽  
Bryan M. Tweedy ◽  
Christian A. Widener ◽  
R. W. Neu ◽  
K. R. W. Wallin ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Friction Stir Welding ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Spot Welding ◽  
Friction Stir Spot Welding ◽  
Stiffened Panels ◽  
Friction Stir ◽  
Integrally Stiffened Panels
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