How Do You Calculate Lateral Strain from Diameter Changes?

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    Computing Strain
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SUMMARY

The calculation of lateral strain from diameter changes involves using the formula Δd/d, where Δd represents the change in diameter and d is the initial diameter. This approach is confirmed as the correct method for determining lateral strain, rather than using the area-based formula ΔA/A. The discussion emphasizes the importance of understanding the relationship between diameter changes and lateral strain in materials science.

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  • Understanding of basic strain concepts in materials science
  • Familiarity with geometric relationships in circular cross-sections
  • Knowledge of the definitions of diameter and area
  • Basic mathematical skills for performing calculations
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The_Engineer
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I'm trying to compute lateral strain for a bar (strain that would make it thicker, or have more cross sectional area).

All I know are the initial and final diameters. This gives me d1 and Δd.

Would the lateral strain be Δd/d or ΔA/A? (A is area)
 
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The former
 
Δd/d
 

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