Question 9. 2. Figure shows the strain-stress curve for a given material. What are (a) Young’s modulus and (b) approximate yield strength for this material?
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Answer:
It is clear from the given graph that for stress 150 x 10^6 N/m² , strain is 0.002.
Therefore young's modulus =stress/strain
150 x 10^6/0.002
= 7.5×10^10 N/m²
Hence, Young's modulus for the given material is 7.5 x10^10 N/m²
The yield strength of a material is the maximum m stress that the material can sustain
without crossing the elastic limit.
It is clear from the given graph that the approximate yield strength of this material is 300x10^6N/m²
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