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draw stress strain curve with explanation
The relationship between the stress and strain for a particular material displays is known as  Stress-Strain curve.Stress–strain curves of various materials may of various type.
eg: Elastic material
The stress against strain of a material with the  elastic behavior, the graph will be a straight line.


The gradient of the above straight line is called the e Young's modulus( E),

                                
 Unit :  Nm2  or  Pa 


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