Mechanical deformation question

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SUMMARY

The discussion centers on the calculation of mechanical deformation using the formula δ = NL/AE. The user initially calculated a deformation of 25 inches with parameters N = 2 kips, L = 150 inches, A = 0.8 inches², and E = 15 KSI. However, the correct deformation is 0.025 inches, indicating a miscalculation likely due to an incorrect value for E. Participants suggest verifying the value of E and recommend posting in the homework section for future inquiries.

PREREQUISITES
  • Understanding of mechanical deformation equations
  • Familiarity with units of force (kips) and area (inches squared)
  • Knowledge of Young's modulus (E) and its significance in material science
  • Basic algebra for manipulating equations
NEXT STEPS
  • Review the concept of Young's modulus and its application in material deformation
  • Learn how to correctly convert units in mechanical calculations
  • Practice solving mechanical deformation problems using different materials and parameters
  • Explore the implications of errors in mechanical calculations and how to avoid them
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Students in engineering or physics, mechanical engineers, and anyone involved in material science or structural analysis will benefit from this discussion.

Alex Katko
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I know that i should use the equation:
δ = NL/AE
In this case, i looked up E and found it to be 15 KSI.

Im trying to find the change in distance between points B and C. Therefore, N should be 2 kips (2000 pounds), L is 150 inches, and A in 0.8 inches squared. Plugging this into the equation gives me 25 inches. However, the correct answer is 0.025 inches.

I think I'm close, but somewhere I'm going wrong. Any help would be great.
 
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I think you slipped a few zero's when you looked up the value for E. Check it again. In the future, please post in the homework section . Thanks.
 
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