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  • 1
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The load-bearing capabilities of short-fiber reinforced thermoplastics composites can be evaluated, in principle, by the methods known to be satisfactory for unreinforced thermoplastics, but in practice the cost of a comprehensive evaluation of a composite would be prohibitive because of the anisotropy of the properties and its variation from point to point. For the same reasons the properties measured on a specimen cut from a molding may have little relevance to its overall performance. This paper describes recent experiments that could lead to a radical change in testing strategy. Instead of the classical method in which standard specimens cut from moldings are assumed to provide the various stiffness coefficients needed for anisotropic stress analysis, simple moldings such as discs or plaques are tested directly. The sacrifice of precision in the measurements and the loss of rigor in the definition of the measured quantities is more than compensated for by a gain in the general utility of the data and the substantial reduction in the cost of evaluations. The mechanical properties of shortfiber thermoplastics composites are particularly sensitive to mold geometry and the new methods of testing enable the effects to be assessed readily, whereas the information generated by the classical method is virtually indecipherable in that context. Examples are given in the paper.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 2019-07-13
    Description: System analysis to determine orbital parameters influence on mission scientific objectives under engineering constraints, using value function
    Keywords: SPACE SCIENCES
    Type: AIAA PAPER 68-1052 , AMERICAN INST. OF AERONAUTICS AND ASTRONAUTICS, ANNUAL MEETING AND TECHNICAL DISPLAY, 5TH; Oct 21, 1968 - Oct 24, 1968; PHILADELPHIA, PA|; STITUTION OF ENGINEE
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  • 3
    Publication Date: 2019-07-13
    Description: System analysis to determine orbital parameters influence on mission scientific objectives under engineering constraints, using value function
    Keywords: SPACE SCIENCES
    Type: AIAA PAPER 68-1052 , ANNUAL MEETING AND TECHNICAL DISPLAY; Oct 21, 1968 - Oct 24, 1968; PHILADELPHIA, PA
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  • 4
    Publication Date: 2019-07-13
    Description: New methodologies were utilized to study the influence of the hypothalamus on the cardiovascular system. The regulation of myocardial activity was investigated in monkeys with hypothalamic lesions that eliminate cardiovascular responses. Observations showed that a specific part of the hypothalamus regulates changes in myocardial contractility that accompanies emotion. Studies of the hypothalamus control of renal blood flow showed the powerful potential control of this organ over renal circulation.
    Keywords: AEROSPACE MEDICINE
    Type: Recent studies of hypothalamic function; International Symposium; May 28, 1973 - May 31, 1973; Alberta; Canada
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