Tensile Testing (Determining Young's Modulus)

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SUMMARY

The discussion centers on the challenges of calculating Young's modulus for steel during tensile testing. It is established that while Young's modulus can typically be derived from the stress-strain curve, factors such as material slipping during the test can invalidate the results. The participants emphasize that accurate measurements are contingent upon the absence of plastic deformation, which complicates the calculation of the modulus. Thus, the presence of slipping directly impacts the reliability of the Young's modulus determination.

PREREQUISITES
  • Understanding of tensile testing procedures
  • Familiarity with stress-strain curves
  • Knowledge of material properties, specifically for steel
  • Concept of elastic versus plastic deformation
NEXT STEPS
  • Research the effects of plastic deformation on tensile test results
  • Study methods to minimize slipping during tensile testing
  • Learn about different materials' stress-strain behaviors
  • Explore advanced techniques for accurately measuring Young's modulus
USEFUL FOR

Materials scientists, mechanical engineers, and students studying material properties and tensile testing methodologies.

stpmmaths
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Question:
Why is it not sensible to calculate the Young's modulus of the material (steel) when the experiments was conducted?

But I thought it should be possible to calculate the Young's modulus after plotting the stress/strain curve. Young's modulus can be found by finding the gradient of the straight line on the curve. But what with the question? :confused:
 
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Is it related to the slipping which occurs during the test?
 

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