Flashcards
Geol 341 exam 2
Cards in this deck (13)
- 1Differential Stress-cause of deformation
-difference between most and least compressive stresses - 2Strain-consequence of differential stress
- 3Mechanical Behaviors depend on mechanical properties (examples)-pebble dropped in water
-breaking glass with rock
-clay, deforms continuously if there is consistent stress - 4What is a solid?-strong
-defined shape & volume
-Hard
-deforms proportionally to load
-maintains shape - 5What is a liquid?-weak
-soft?
-takes shape of vessel
-deforms under any load - 6Elastic- ability for a material (rock) to undergo stress, deform, and then recover and return to its original shape after the stress ceases
Example: silly puddy
- 7Plastic-ability of certain solids to flow or change shape permanently
Example: play-do - 8Stress-Strain relationship-change in length is proportional to applied force
- 9Linear behavior elastic behavior like a spring (picture and equations)
- 10Young's Modulus (E)- Elastic constant
-Measure of stiffness
- Like a spring constant
-unit of stress
Plexiglass: E= 3 Gpa
Shale: E= 10-30 Gpa
Granite: E= 40-70 Gpa
Basalt: E= 60-80 Gpa
Steel: E=200 Gpa - 11Elastic strain calculation example
- 12Poissons Ratio-accounts for volume change during strain
-quartz is compressible
-rubber is incompressible
- 13Stress- strain 3D equation
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- Geology Flashcards on Geol 341 exam 2, created by Morgan Walter on 29/10/2021.
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- Morgan Walter
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