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Hoop Strain vs Longitudinal Strain: Understanding Boundary Effects and Fabrication Techniques in Solid Mechanics

This article explores the difference between hoop strain and longitudinal strain, with a focus on boundary effects and fabrication techniques in solid mechanics. It also discusses the importance of understanding these concepts in the context of patent infringement cases, such as the Samsung vs Apple lawsuit in 2012. Additionally, it provides practical examples and resources for further research.

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Hoop Strain vs Longitudinal Strain: Understanding Boundary Effects and Fabrication Techniques in Solid Mechanics

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  1. Journal Articles, technical reports, and patents Trade Magazines Newspapers, magazines, and blogs (pop science)

  2. Patents In 2012, US courts ordered Samsung pay $1.05 BILLION to Apple for patent infringement on the iPhone.

  3. B1 - Longitudinal vs. Hoop Stress Hoop strain is always greater than longitudinal strain!

  4. Boundary effects or “edge effects” Rigid end cap were not considered in theoretical derivation.

  5. Senior Design Fabrication technique is critical! Soldered bread board “Solderless” bread board

  6. Solid Mechanics – Hooke’s Law For a spring For any material

  7. Beyond Hooke’s Law “Plastic” region “Linear-elastic”

  8. Hot rolled vs. cold rolled steel samples Hot rolled: https://www.youtube.com/watch?v=6xnKmt_gsLs&authuser=0 Cold drawn: https://www.youtube.com/watch?v=XzCQywFwies&authuser=0 For Sale: https://www.alibaba.com/product-detail/Top-Quality-Machinery-New-Design-Hot_60540176243.html

  9. B2 – Uniaxial Tensile Tests You will use an ATS load frame to measure a stress-strain curve of steel. BRING A FLASH DRIVE!

  10. Linear Variable Displacement Transducer(LVDT) Inserting a steel rod into a solenoid changes its inductance. μ is “magnetic permeability” http://www.ni.com/ http://www.digikey.com/

  11. Extensometer Clips onto sample, measures change in length ΔL.

  12. Load Cell Outputs a voltage proportional to force. https://en.wikipedia.org/wiki/Load_cell http://www.interfaceforce.com/index.php?mod=product&show=5

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