By Weinong W. Chen (auth.), Tom Proulx (eds.)
Dynamic habit of fabrics, quantity 1: lawsuits of the 2010 Annual convention on Experimental and utilized Mechanics, the 1st quantity of six from the convention, brings jointly seventy one contributions to this crucial zone of analysis and engineering. the gathering offers early findings and case stories on primary and utilized facets of fabrics technological know-how, together with papers on Composite fabrics, Dynamic Failure and Fracture, Dynamic fabrics reaction, Novel checking out suggestions, Low Impedance fabrics, steel fabrics, reaction of Brittle fabrics, Time established fabrics, excessive pressure price trying out of organic and smooth fabrics, surprise and excessive strain reaction, vigorous fabrics, Optical ideas for Imaging excessive pressure fee fabric reaction, and Modeling of Dynamic Response.
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Additional resources for Dynamic Behavior of Materials, Volume 1: Proceedings of the 2010 Annual Conference on Experimental and Applied Mechanics
Example text
The points in red represent values for steel and alumina since these were discussed earlier. The steel is a BCC metal and shares some properties with the pure tantalum shown earlier. The AD85 has a lower alumina content than AD995 but similar mechanisms will be operating to define its response. It is interesting to note that the material with the highest HEL, B4C, does not have the best performance as might be expected on the basis of purely its strength since beyond this elastic value its strength rapidly falls away relative to the other ceramics.
Time for 20% Energy as a Function of Crack Velocity Ballistic Gelatin Rate for 20% Ballistic GelatinatatLow Slow Rate Load -1 60 Time (sec) Figure 4. Maximum Strain and Load vs. 5 Crack Velocity (mm/s) Figure 7. Energy vs. Crack Velocity for 20% Ballistic Gelatin at Low Rate The preceding data is representative of the data obtained for 10% and 20% ballistic gelatin at low and high rates, and for Perma-Gel at low rate. Valid results for the Perma-Gel fracture experiments at 127 mm/s could not be obtained; the test machine reached its maximum extension (100 mm) prior to the crack propagating at this rate.
2 shows the impulse recorded at a Lagrangian sensor for a BCC metal and a glass. The longitudinal and lateral stress components of the axisymmetic stress field are shown in dashed lines for each material. In the case of the BCC Ta shown, the longitudinal stress pulse shows that an elastic precursor has arrived before the plastic 28 front rises to the Hugoniot stress at the gauge station17. The sensors are limited in their response times. The lateral gauge takes time to equilibrate to the flow field in materials where the impedances of gauge and target are not close.