Flashcards
kinematics
Flashcards do conjunto (23)
- 1Strain Definitiontensor (rank 2); tensor that is defined by 3 components, magnitude, direction of displacement gradient and the direction of plane of action, units = none, kinematic quantity
- 2Displacement Gradienthow displacement is changing with position
- 3Stress DefinitionTensor (rank 2); magnitude, direction of tractions and direction of plane of action
- SI units; (pa) pascal 1Pa=1Nm-2, force, dynamic quantity - 4RheologyStudy of how materials flow (deform), applies to solids.rheological laws describe the cause and effect relationship between dynamic quantity eg stress and kinematic one eg strain
- 5Rheological classes of interestelasticity, plasticity and viscosity
- 6ElasticitySeismology, tyope of stress induced by natural earthquakes or artificial(explosions) produces instant strain, propogates away from source
- 7PlasticityStructural geology, non reversible changes of shape (example=strain), deformation that takes place omce the applied stress crosses a threshold. relevent to solids and fluids
- 8ViscosityFluid dynamics- sedimentology and volcanology, gives sheer stress and produces a flow, deformation over time at a constant rate (strain rate), applies to fluids.
- 9Cobstitutiverelationship between stress and strain levsls
- 10Tensors9 valves not 3 like vectors
- 11seismic wave velocities depend onelastic properties and density of the rocks which the wave travels
- 12kinematics defiitionstudy of motion (position, acceleration, velocity)
- 13another word for straindeformation
- 14another word for yield stressyield strength
- 15fluids in geologywater- lakes, magma- lave flows, ice- glaciers, gases- hydrocarbons
- 16after some deformation and eventually resists deformationsolid
- 17material flowing indefinitelyfluid
- 18viscousonly apparent after long times in fluid
- 19viscosityif the thickness or stickness of a fluid or more technically its resistance to deformation
- 20kinematic viscosityno dynamic quantities involved, v=n/p, m2s-1
- 21viscosity in gasesinc as temp increases, molecular diffusion
- 22viscosity in liquidsfall as temp increases, depend on additional foces between molecules
- 23—
Informações
- Descrição
- FlashCards sobre kinematics, criado por Sophia Thain em 30-04-2018.
- Criado por
- Sophia Thain
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