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  • 1970-1974  (7)
  • 1
    Electronic Resource
    Electronic Resource
    Environmental Education (1973)
    [s.l.] : Nature Publishing Group
    Nature 242 (1973), S. 214-214 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,-This Institution is now carrying out a survey of current and anticipated provisions at establishments of higher and further education and at schools in the field of education in environmental subjects. A substantial proportion of these establishments have already replied and the information ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/242214b0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Anticholinesterase activity and enzymatic degradation of phosphamidon and γ-chlorophosphamidon a comparative study (1971)
    Springer
    Bulletin of environmental contamination and toxicology 6 (1971), S. 205-208 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01539928
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Study of cylindrical stress waves generated by exploding wires (1972)
    Springer
    Experimental mechanics 12 (1972), S. 104-106 
    Details
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An experimental technique utilizing high-pressure gas from an exploding wire is used to load long, hollow, thick-walled cylinders from the inside. Resulting plane-strain cylindrical stress waves are one-dimensional in nature. Asimultaneity of impact is studied with methods of high-speed photography and dynamic photoelasticity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02408447
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Strain-optic law for a certain class of birefringent composites (1974)
    Springer
    Experimental mechanics 14 (1974), S. 355-360 
    Details
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A strain-optic law for a certain class of birefringent fiber-reinforced composite materials is developed. The strain-optic law requires both mechanical and optical characterization of the material. Previous investigations have hypothesized the existence of three independent optical properties for the anisotropic birefringent material. The strain-optic relation developed in this study, however, requires only a single strain-optic coefficient, coupled with four independent mechanical material properties, for prediction of the optical response of a birefringent anisotropic material. Experimental results are presented which show good agreement with the developed strain-optic relation. Finally, the isoclinic parameter is investigated and preliminary evidence is presented which indicates a correspondence between principal-strain direction and optical isoclinic angle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02323561
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Longitudinal impact of cylindrical shells (1972)
    Springer
    Experimental mechanics 12 (1972), S. 25-31 
    Details
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The transient response due to longitudinal impact of three aluminum cylindrical shells of different thickness-to-radius ratios is studied both analytically and experimentally. The analyses were obtained from method of characteristics' solutions of two sets of equations: one which includes the transverse shear, radial inertia and rotary inertial effects; and the other set is from a modified membrane theory. Experimentally, longitudinal and circumferential strains are monitored along the length of each of the shells; the velocity of the impacter ring is also measured. The experimental results of this study indicate that the wavefront, after traveling three diameters from the impacted end, propagates at essentially the plate velocity, in agreement with the theory. In addition, the longitudinal and circumferential strains calculated from the two theories are in good agreement with the experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02320786
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    A technique for generating shear waves in cylindrical shells under radial impact (1974)
    Springer
    Experimental mechanics 14 (1974), S. 417-419 
    Details
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Experimental techniques are developed to study and measure the shear-wave velocity in an aluminum cylindrical shell subjected to a radial impact. The radial impact is obtained by exploding an electrical detonator inserted in plastic plugs mounted on the end of the shell. Strain gages, mounted on the outside surface of the shell at various axial locations, are used to obtain oscilloscope traces from which the shear-wave velocity can be calculated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02324947
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Elastic-wave propagation in a joined cylindrical-conical-cylindrical shell (1973)
    Springer
    Experimental mechanics 13 (1973), S. 150-156 
    Details
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The problem of longitudinal impact of a thin finite-joined shell, consisting of a cylinder-truncated cone-cylinder, is analyzed both experimentally and analytically. the model analyzed is a 1/100-scale replica of a portion of the Apollo/Saturn V vehicle. Experimental results were obtained from a drop-test system. Longitudinal and circumferential strain pulses were monitored on each section of the joined shell. The velocity of the impacter ring prior to impact was measured and used as a boundary condition in the solution of the governing partial-differential equations. A “bending” theory, including transverse-shear, radial-inertia and rotary-inertia effects, was used to analyze the finite-joined shell. Appropriate transformation relations were developed at each of the joints between the cylinders and truncated cone. The results were then obtained by solving the governing equations numerically by the method of characteristics. Good agreement between analytical and experimental strain profiles was obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02322668
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    Paper (German National Licenses)
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