Engineering Fundamentals Refresh: Strength vs Stiffness vs Hardness
Written by
Humberto Villasenor-Ochoa

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February 16, 2017

Our latest Hardware Guide post explains the common pitfalls in identifying between mechanical strength vs. stiffness vs hardness, the technical differences between the three, and their relevance in the selection of engineering materials for product development.

A Stress-strain curve showing the relationship between stiffness and yield strength (Yield Point)

In this article we cover:

  • Important definitions to keep in mind for strength, stiffness, and hardness.
  • The concepts of stress and strain
  • How to retrieve mechanical property data
  • 3 practical examples of strength vs. stiffness: beam deflection, axial loading on a straight member, and thermal stress.
  • 4 best prototyping practices when designing for these mechanical properties

Read the full Hardware Guide post here!

Written by
Humberto Villasenor-Ochoa
Mechanical Engineer with expertise in engineering design and analysis. I have worked with the National Aeronautics and Space Administration in completing multiple projects such as the design of an olfactory delivery system, and alternate clothing sanitizing systems for long duration space missions.
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