By Markus Reiner (auth.), Ulric S. Lindholm (eds.)
An sufficient actual and mathematical description of fabric be havior is easy to all engineering functions. thankfully, many prob lems will be taken care of totally in the framework of elastic fabric reaction. whereas even those difficulties could develop into yuite complicated be reason for geometrical and loading stipulations, the linearity, reversibility, and expense independence usually acceptable to elastic fabric descrip tion definitely eases the duty of the analyst. this present day, despite the fact that, we're in creasingly faced with sensible difficulties which contain fabric reaction that is inelastic, hysteretic and cost based mixed with loading that is brief in nature. those difficulties contain, for example, structural reaction to relocating or impulsive a lot, the entire parts of ballistics (internal, exterior and terminal), touch stresses lower than excessive velocity bearings, excessive velocity machining, rolling and different steel operating techniques, explosive and influence forming, surprise attenuation constructions, seismic wave propagation, and so on of equivalent im portance. As those difficulties have been encountered, it turned more and more obvious that we didn't have to hand the actual or mathematical description of the habit of fabrics essential to produce life like strategies. therefore, over the last ten years rather, there was enormous attempt expended towards the new release of either experi psychological facts at the dynamic mechanical reaction of fabrics in addition to the formula of lifelike constitutive theories. It used to be the aim of the Symposium at which the articles during this e-book have been provided to debate and assessment fresh advancements during this field.
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Additional info for Mechanical Behavior of Materials under Dynamic Loads: Symposium Held in San Antonio, Texas, September 6-8, 1967
Sample text
Prik!. Mat. ), 9, 91 (1945). 6. J. F. Bell,J. App!. , 31,2188 (1960). 7. J. F. Bell,J. App!. , 32,1982 (1961). 8. J. F. Bell, J. Mech. and Phys. of Solids, 9, 261 (1961). 9. J. F. Bell, Proc. M. Symposium on 2nd Order Effects in Elasticity, Plasticity, and Fluid Dynamics, 173, Haifa (1962). 10. J. F. Bell, Proc. 1. M. Symposium on Stress Waves in Anelastic Solids, 166, Brown University (1963). 11. J. F. Bell, Colloquium on Behavior of Materials Under Dynamic Loading, ASME, New York, 19 (1965).
1 in. is 80 JLsec which compares very favorably with the averaged data in Table 2 for the same positions. Furthermore, subsequent larger impacts also gave data having very good agreement with averaged results. Thus we conclude that the plastic parts of the wave are not appreciably affected by the junctions. Observe however in Fig. /in. 1 in. station and this is within a single section. 0 in. /in. for 100 JLsec before an unloading wave arrives from the free end and reduces the stress there. 0 in.
11 I 14 30 Oscar W. Dillon,jr. 16 LARGE INITIAL I en Z W ~ X'4-6] ~6-8 . in/in a.. en IJ.... 9 ,.. ,. sec) Fig. 4. /in. to propagate two inches in impacts like the one used to produce Fig. 3. 5 ,.. sec en • = 765 f£ in/in Z W 12 LARGE INITIAL IMPACTS ~ U w TOTAL SAMPLE SIZE = 33 a.. en IJ.... ,. sec) Fig. 4a. /in. to propagate two inches in impacts like the ones used in Figs. 3 and 4. 31 Plastic Waves and Heat Generated Table la THE SAME INFORMATION AS IN TABLE I EXCEPT THESE SPECIMENS WERE SLIGHTLY PLASTICALLY DEFORMED IN A PREVIOUS IMPACT.
