14. Similarity between Stress and Strain tensors
The lecture discusses the similarities between stress and strain tensors, emphasizing their properties and the mathematical relationships. Key topics include principal directions and components, the diagonalization of matrices in principal coordinate systems, the application of Mohr's circle for strain, and strain compatibility conditions. The content underscores that concepts derived for stress tensors can also be applied to strain tensors due to their analogous framework.
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What we have learnt
- Stress and strain tensors exhibit similar properties and can be treated analogously in analysis.
- Principal strain directions can be identified using eigenvectors and eigenvalues, similar to principal stress components.
- Invariants exist for both stress and strain tensors, denoting key characteristics of these tensors.
Key Concepts
- -- Stress Tensor
- A mathematical representation of internal forces in a material, capturing magnitude and direction.
- -- Strain Tensor
- A mathematical construct that describes the deformation of material in terms of elongation or contraction.
- -- Mohr's Circle
- A graphical tool used to represent and calculate the relationships between normal and shear stresses and strains.
- -- Principal Directions
- Specific orientations in materials that experience maximum or minimum stress or strain.
- -- Strain Compatibility Conditions
- Mathematical requirements ensuring that a defined strain matrix corresponds to achievable displacements without causing overlaps or discontinuities.
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