Stress-strain curves and modulus of elasticity

When we apply a stress to a material we get a strain. But how much? The amount of strain will be proportional to the modulus of elasticity also known as Young's modulus or the materials stiffness. Yount's modulus is the slope of the stress vs strain curve during the elastic deformation region. Most materials have linear elastic regimes, some have non-linear elastic regimes. Ceramics have higher stiffness than metal and these are higher than polymers. Stiffness is proportional to the slope of the interatomic force vs interatomic separation distance evaluated at the equilibrium bond distance.

[@GalacticAdventures69]

Can tell you're really passionate and that's really heartwarming :) Thanks for getting me through my Material Science intro course Prof. Love from Singapore

[@TaylorSparks]

Heck ya! Share three love by like/sub/share or even better leaving our materialism podcast a review on itunes ;)

[@flukeandfriend]

Thank you so much, your explanation is very clear and easy to understand.

[@giggachad8153]

How does a compressive curve look and how do you analyze it ?

[@TaylorSparks]

@@giggachad8153 there's no guarantee, but it typically looks a lot like the tension curve but smoother and higher strength values since most materials are going to be stronger under compression than tension. This is especially the case with ceramics.

[@giggachad8153]

@@TaylorSparks Do you hppen to have any referenc material showing the compression part of these graphs? most of what i find are examples in tension and I am trying to mathematically prove the Modulus of elasticity for some experimental data i collected on a polymer. my stress (compression) vs strain does not have the shape i expected and it doesnt follow any of the examples ive found. It also does not express linear behavior which is making it difficult to find the modulus. Thanks !