| Introduction to rheology - | |||||||||
| Brittle vs ductile deformation: The role of temperature, composition and strain rate... | |||||||||
| Objects deform as continuum (continuous deformation) or through fracturation (discontinuous or brittle deformation). | |||||||||
| Discontinuous deformation: |
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| • Case 1: The media is pre-fractured, its strength depends on the frictional strength of pre-existing fractures.
• Case 2: The media has no pre-existing fractures, its strength depends on its constitution in particular on the cohesion of its grain. |
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| Continuous deformation: |
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| • Elastic deformation • Plastic deformatoin • Viscous deformation |
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Each mode of flow has a characteristic flow curve that we will study first before to look for natural evidences. |
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