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3 months ago in Astrophysics , Mechanical By Kumar

What’s the difference between einstein’s stress-energy tensor and the "cairo technique"

I keep seeing "stress-energy tensor" in GR, and also something called the "Cairo Technique" tensor in elasticity. Are they related?

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By Shobha Answered 1 month ago

They share a name but live in different universes. Einstein's stress-energy tensor describes the density and flux of energy and momentum in spacetime it's the source of gravity in GR. The Cairo Technique refers to a method in continuum mechanics for solving elasticity problems; its tensors describe material stress and strain in a Newtonian framework. Same word, completely different domains. One curves spacetime. The other bends beams.

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