Abstract
The mechanical behaviour of some metals has been investigated experimentally for compressive loading cycles of approximately 100 and 370 μs duration and for steady-state compressive loading. For the dynamic measurements the split Hopkinson pressure bar technique has been used in which cylindrical specimens are sandwiched between two rods and deformed under the action of a compressive stress wave induced by impacting the free end of one of the rods with a projectile launched by a light gas gun. The experimental results show that for the available range of strain rates the stress-strain curve is independent of strain rate. These results are compared with the mechanical behaviour predicted by a particular form of nonlinear mechanical equation of state.
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