Calculating Young's Modulus of Elasticity for 0.1% Carbon Steel

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In summary, the conversation discusses the attempt to calculate the Young's modulus of elasticity for a 0.1% carbon steel material using results from a tensile test. The calculations were done using the formula E = σ/ε, but the resulting value of 14.32 x 109 is significantly lower than the typical value of 207 x 109. The unit of area was confirmed to be in m^2 and the force in N, but the discrepancy remains.
  • #1
MMCS
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I am trying to calculate youngs modulus of elasticity for results from a tensile test but can't seem to get a figure close to that of the common figure for the material

Material 0.1% carbon steel
Area = 20 x 10-6
Yield force = 6009N
Length increase at yield force = 0.537mm = 0.000537m
Original length = 25.6mm = 0.0256mE = σ/ε

E = (6006/20x10-6) / (0.000537/0.0256)
E = 14.32 x 109
Typical value = 207 x 109

Iv obviously went very wrong somewhere but i don't know where

Thanks
 
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  • #2
Your calculations seem fine, what is the unit of the area? You can also make sure that the force is in N, not in kN or something.
 
  • #3
The unit of area is m^2, and the force was 6.009 KN so 6009 N. Its way off the typical value though, it doesn't make sense?
 

What is Young's modulus of elasticity?

Young's modulus of elasticity is a measure of the stiffness of a material. It is the ratio of stress to strain within the elastic limit of a material, and it is used to describe how much a material will deform under a given amount of stress.

How is Young's modulus of elasticity calculated?

To calculate Young's modulus of elasticity, you will need to measure the stress and strain of a material. Stress is measured in units of force per unit area (such as pounds per square inch), while strain is a unitless measure of deformation. Simply divide the stress by the strain to calculate Young's modulus.

Why is Young's modulus of elasticity important?

Young's modulus of elasticity is important because it helps engineers and scientists understand how materials will behave under different types of stress. It is also used to compare the stiffness of different materials and to determine which material will be best suited for a particular application.

What factors can affect Young's modulus of elasticity?

The Young's modulus of elasticity can be affected by various factors, such as temperature, the presence of impurities or defects in the material, and the material's microstructure. Additionally, different types of stress, such as tension or compression, may result in different values for Young's modulus.

How does Young's modulus of elasticity relate to other material properties?

Young's modulus of elasticity is just one of several material properties that describe how a material responds to stress. Other properties, such as yield strength, ultimate strength, and ductility, also play a role in determining a material's overall strength and behavior under different types of stress.

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