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In response to the failure of a conical section of the Insat C satellite during certification testing, the use of beryllium for payload structures, particularly in sheet product form, is being reevaluated. A test program was initiated to study the tensile, shear, and out-of-plane failure modes of beryllium cross-rolled sheet and to apply data to the development of an appropriate failure criterion. Tensile test results indicated that sanding the surface of beryllium sheet has no significant effect on yield strength but can produce a profound reduction in ultimate strength and results obtained by finite element analysis. Critical examination of these test results may contribute to the modification of a JSC policy for the use of beryllium in orbiter and payload structures. Henkener, J. A. and Spiker, I. K. and Castner, W. L. Johnson Space Center...
Test techniques were developed for the determination of short-transverse tensile properties, Poisson's ratios, and shear moduli in anisotropic sheet. Cross-rolled 0.077-in. thick S-200 Beryllium sheet was tested to determine Young's moduli, Poisson's ratios, shear moduli, uniaxial tensile properties in three directions, biaxial tensile properties, three- and four-pint bend characteristics, fracture toughness, effect of anisotropy on fatigue strength, microstructural characteristics, basal and prism pole figures.
Technical reports published by the Air Force Materials Laboratory during the period 1 January 1967-31 December 1967 are abstracted herein and indexed by branches of the laboratory, technical subject matter, investigator, project monitor and contractor. Reports on research conducted by the Air Force Materials Laboratory personnel as well as that conducted on contract are included.
These reports cover basic and applied research in the materials area being conducted by the Metals and Ceramics, Nonmetallic Materials, Physics, Manufacturing Technology and Applications Laboratories of the Directorate of Materials and Processes.
The report is a comprehensive guide to the manufacture of beryllium wrought products by forging, extrusion, wire-drawing, rolling, or forming. The various specific processes available for each of these operations are described in detail and compared. The economics of each of the operations is discussed. An introductory section of the report discusses the commercial forms of beryllium and beryllium alloys that are available, and provides a brief description of the phenomenon of texturing in beryllium. (Author).
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index