Consider the tensile test plot illustrated above Assume that

Consider the tensile test plot illustrated above. Assume that the gage region of the tensile test specimen had an original length of 1 in. and an original diameter of .25 in. After the completion of the tensile test, the fractured ends of the specimen were butted up against one another. The length of the deformed gage region was determined lo be 1.18 in. The diameter of the gage region at the fracture region was determined to be .22 in. The ductility of the tensile test specimen is closest to which one of the following? a) 1% b) 1.8% c) 10% d) 18% e) 20% Consider the tensile results described in problem 5. The tnie strain at fracture is closest to which one of the following? a) .057 b) .127 c) .256 d) .327 e) .357

Solution

ductility is measured as the engineering strain at the fracture point which is 18%.

true strain= ln(1+e) = ln(1.18) = 0.167= 16.7%