Low carbon steel is known to have a slight but not negligible strain rate sensitivity at room temperature. To determine

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Low carbon steel is known to have a slight but not negligible strain rate sensitivity at room temperature. To determine the value m, specimens with width w = 1 2 .68 mm, thickness h = 3 .23 mm, and calibration length 1 = 50 mm were tested, with a head speed of 6 mm/min until it reached a load of 1 0 660 N. At this point the speed instantly increased tenfold to 60 mm/min and the load increased to 1 1 096 N. Calculate the value of m. (Hint: Since the cross-sectional area is constant at the time of the velocity change, force can be substituted for stress.)