Relationship between displacement and stress

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SUMMARY

The relationship between displacement and stress in a simple elastic case is defined by the equation σ = E * (du/dx), where σ represents stress, E is the modulus of elasticity, and du/dx is the gradient of displacement. A negative gradient of displacement indicates that the material is under compression, resulting in negative stress. This fundamental principle is crucial for understanding material behavior under load.

PREREQUISITES
  • Understanding of basic mechanics of materials
  • Familiarity with stress-strain relationships
  • Knowledge of modulus of elasticity (E)
  • Concept of displacement gradients
NEXT STEPS
  • Study the principles of elasticity in materials science
  • Explore the derivation and applications of the stress-strain curve
  • Learn about different types of loading conditions and their effects on materials
  • Investigate advanced topics in continuum mechanics
USEFUL FOR

Mechanical engineers, materials scientists, and students studying mechanics of materials will benefit from this discussion, particularly those focusing on the behavior of materials under stress and displacement conditions.

hoomanya
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Hi, Am I right in saying that if the gradient of displacement is negative then stress is negative as in a simple elastic case, sigma = E*du/dx? thanks.
 
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hoomanya said:
Hi, Am I right in saying that if the gradient of displacement is negative then stress is negative as in a simple elastic case, sigma = E*du/dx? thanks.
Yes. It means that the rod is being compressed.
 
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