Does Copper's Young's Modulus Remain Constant When Stretched?

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Copper's Young's modulus remains constant when stretched within the elastic range, which is the initial phase of deformation. The modulus is defined as the slope of the stress-strain curve, representing the material's stiffness. Beyond the elastic limit, the Young's modulus will no longer be constant as the material undergoes plastic deformation. A stress-strain diagram for copper can help visualize these concepts. Understanding these principles clarifies how copper behaves under stress.
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when the copper is stretched,does its young modules keep constant?
I am confused because the area will be decreased and the young modules is just related to the the material.
 
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Do you have a stress-strain diagram for copper? The modulus is the relation between the two (it is the slope of the plot). In other words, the modulus is the stiffness. When stretched, it will remain constant for a certain range (the elastic range). Once it passes that limit, it will not remain constant.

Generic Stress-Strain Curve:
StressStrainCurve.gif
 
Last edited:
FredGarvin said:
Do you have a stress-strain diagram for copper? The modulus is the relation between the two (it is the slope of the plot). In other words, the modulus is the stiffness. When stretched, it will remain constant for a certain range (the elastic range). Once it passes that limit, it will not remain constant.

Generic Stress-Strain Curve:
StressStrainCurve.gif
thx!The mind is clear now,but I don't under stand the lower half diagram
 
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