Proceedings of the Army Symposium on Solid Mechanics, 1968, Held at the Johns Hopkins University, Baltimore, Maryland, September 10-11, 1968
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Published: 1968
Total Pages: 160
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Published: 1968
Total Pages: 160
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Published: 1968
Total Pages: 0
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Published: 1982
Total Pages: 1032
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DOWNLOAD EBOOKIncludes entries for maps and atlases.
Author: Army Materials and Mechanics Research Center (U.S.)
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Published: 1968
Total Pages: 285
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DOWNLOAD EBOOKAuthor: Applied Mechanics Research Laboratory (U.S.)
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Published: 1968
Total Pages: 285
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DOWNLOAD EBOOKAuthor: P. Madsen
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Published: 1972
Total Pages: 188
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DOWNLOAD EBOOKPorous metal sheet with controlled permeability was made by space winding and diffusion bonding fine wire. Two iron-chromium-aluminum alloys and three-chromium alloys were used: GE 1541 (Fe-Cr-Al-Y), H 875 (Fe-Cr-Al-Si), TD Ni Cr, DH 245 (Ni-Cr-Al-Si) and DH 242 (Ni-Cr-Si-Cb). GE 1541 and H 875 were shown in initial tests to have greater oxidation resistance than the other candidate alloys and were therefore tested more extensively. These two materials were cyclic furnace oxidation tested in air at 1800 and 2000 F for accumulated exposure times of 4, 16, 64, 100, 200, 300, 400, 500, and and 600 hours. Oxidation weight gain, permeability change and mechanical properties were determined after exposure. Metallographic examination was performed to determine effects of exposure on the porous metal and electron beam weld joints of porous sheet to IN 100 strut material. Hundred hour stress rupture life and tensile tests were performed at 1800 F. Both alloys had excellent oxidation resistance and retention of mechanical properties and appear suitable for use as transpiration cooling materials in high temperature gas turbine engines.
Author: William C. Stilwell
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Published: 1972
Total Pages: 84
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DOWNLOAD EBOOKA study of the buckling of thin shells was conducted using a digital computer program for the geometrically nonlinear analysis of arbitrarily loaded shells of revolution. The objective was an evaluation of the program's applicability to bifurcation buckling and imperfection sensitivity analysis. Clamped spherical caps under pressure loading and clamped truncated hemispheres under axial tension were investigated. Buckling loads were determined for axisymmetric and nearly axisymmetric loads and are compared with previously published analytical results based on geometric imperfections.
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Published: 1969
Total Pages: 1066
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Published: 1974
Total Pages:
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