Homework Answers
Given data for specimen:
Yield stress= 1160Mpa = 1160 N/mm2
UTS= 1240Mpa = 1240 N/mm2
specimen dia = 12.5 mm (gauge dia)
Given data for machine:
Load capacity = 145 KN = 145000 N
Solution:
The dia of specimen is given as 12.5mm, so the area of Cross section will be 122.65mm2.
The maximum loading capacity of the machine is given as 145000N.
Therefore the maximum stress induced in the specimen will be 145000/122.65 = 1182.22 N/mm2.
This shows that the specimen cannot be tested in this machine because, the ultimate stress is the specimen is more than the capacity of the machine.
Hence this machine is NOT suitable to test this specimen. Higher capacity machines with more than 200KN capacity has to be chosen.
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Please provide me clear handwriting
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