A specimen of medium-carbon steel having an initial diameter of 0.503 in was tested in tension using a gauge length of 2 in. The following data were obtained for the elastic and plastic states:

Note that there is some overlap in the data. Plot the engineering or nominal stress-strain diagram using two scales for the unit strain ǫ, one from zero to about 0.02 in/in and the other from zero to maximum strain. From this diagram find the modulus of elasticity, the 0.2 percent offset yield strength, the ultimate strength, and the percent reduction in area.

Transcribed Image Text:

Elastic State Plastic State Load P EBongation, Ibf in lbf 1 000 2 000 зао 4 000 7 000 8 400 8 800 9 200 0.0004 0.,0006 0.0010 0.0013 0,0023 0.0028 0.0036 0.0089 0.1984 0.1978 0.1963 0.1924 0.1875 0.1563 0.1307 0.1077 8 800 9200 13 200 15 200 17 000 16 400 14 800