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What does σij represent in a 3×3 stress matrix?

What does σij represent in a 3×3 stress matrix? Correct Answer Stress is applied on i face of the material in the -ve j direction

For a 3-dimensional material, stress is always defined by nine components. Each component represents the face on which the stress is applied along with the direction in which the stress is applied. Standard notation σij always represents stress is applied on i face on the material in -ve j direction.

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