... [ 8 ] , but until recently , little effort was devoted to applying statistical tools to fatigue crack propagation behavior . By fitting different equa- tions to the crack ... pro- pagation behavior [ 5,6,7,8 ] . It can be easily shown that the ...
Compressive Strength of 24S-T Aluminum-alloy Flat Panels with Longitudinal Formed Hat-section Stiffeners Having a Ratio of Stiffener Thickness to Skin Thickness Equal to 1.00
... flow factor for outward flow ( equa- tion ( 39 ) ) is quite similar to that ... exhaust process and therefore F is proportional to the product of the ... calculator auto- matically distinguishes between the flow factor for inward flow and ...
Localized Corrosion--cause of Metal Failure: A Symposium
... stainless is 1250 F ( 677 C ) , 1 h . For most welding applications this ... stainless steels , sen- sitization consists of heating to above about 1700 F ( 927 C ) ... F ( 593 C ) . The simulation of welding in some of the nickel base 110 ...
The Lateral Stability of Equal-flanged Aluminum-alloy I-beams Subjected to Pure Bending
... beam ( in in . - lb ) was equal to three times the load . The ends of each pair of beams were laterally restrained by means of the end restraining frames shown in figure 3. Both top and bottom flanges of the beams were bolted to the ...
The Relationship Between Mechanical Properties and Microstructure in an Aluminum -tin-copper Alloy
... chord lift coefficient resulting from a unit angle- of - attack deflection Δα over part of the tail span Mach number hinge - moment factor for theoretical load caused by streamline - curvature correction ( refer- ence 6 ) internal ...
Correlation of Stress-wave-emission Characteristics with Fracture Aluminum Alloys
... HYDROTEST PROCEDURE AND INSTRUMENTATION FOR SUBSCALE PRESSURE VESSELS 1 . Details of Hydrotest Procedure The nominal hydrotest procedure which was employed in testing both at room temperature and cryogenic temperature is shown below ...
Separation of Cast and Wrought Aluminum Alloys by Thermo-mechanical Processing
... Separation of cast and wrought aluminum alloys by thermomechanical processing . ( Report of investigations / Bureau of Mines ; 8960 ) Bibliography : p . 12 . Supt . of Docs . no .: I 28.23 : 8960 . 1. Scrap metals . 2. Aluminum alloys ...
... true crack occurs until step 5 . cohesive crack front true crack front ↑ Ꭹ pz 不 1 pz X Another interesting point to be observed concerns the computed dimensions of the process zone ( Fig . 6 ) . The characteristic length ( lch EGF ...
Direct-reading Design Charts for 75S-T Aluminum-alloy Flat Compression Panels Having Longitudinal Straight-web Y-section Stiffeners
... combustion . If a fuel - air ratio of 0.0225 were experimentally required to ... alcohol mixture addition . The addition of 0.08 pound of water - alcohol ... isopropyl alcohol is added , 83f " is zero . Correction for the water - alcohol ...
Fractography--microscopic Cracking Processes: A Symposium Presented at the Seventy-eighth Annual Meeting, American Society for Testing and Materials, Montreal, Canada, 22-27 June 1975
... metals and the total non - Al coverage , it appears that the two etching ... metals would reach a steady state value that would not be expected to be substantially different from the original ( untreated ) value , just as is observed . Table ...
Strain Measurements and Strength Tests of 25-inch Diagonal-tension Beams with Single Uprights
... tension . The factor ( 1 + kC2 ) was suggested in reference 2 as a means of ... calculate stresses from strains do not apply strictly in the plastic range ... tension folds developed 10 NACA ARR No. L5J02a.
Requirements for Auxiliary Stiffeners Attached to Panels Under Combined Compression and Shear
... shear flow in the flanges is thereby increased . One result is an increase in the moment of the couple produced by the flange shear forces and therefore an increase in the dis- tance from the web to the shear center . Alternatively it ...
A New Aluminum Sand Casting Alloy of High Toughness (M-45): A Report
