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Developer Source 7
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flett101.gif
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1997-04-17
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Table 1 Comparison of active materials PZTSH PMN PLZT PVDF Terfinol-D SMA Conducting (NITi) Polymer Human Polymer Hydro-gel Muscle Max strain (X 10 ) 300 3000 200 1800 70000 20000 400000 400000 Max stress (MPa) 19 72 190 180 Density (kg/m3} 7500 7500 ~7500 1780 9250 6450 ~1500 -1300 1037 Modulus (GPa) 62 120 -60 40 78 5 <0.1 .06 Efficiency (%) 56 75 2 40 >3 530 30 >35 Bandwidth (Hz) 1000 1000 1000 3 4 Energy density (KJ/m ) 2.9 22 19 310 >1 0.4 0.8
