1 / 19

-Elastic Properties of Solids

-Elastic Properties of Solids . AP Physics C Mrs. Coyle. Real objects are not rigid but can deform under the influence of an external force. Remember: Hooke’s Law F=-kx. Elastic Properties of Solids. Length (Tensile Stress- Strain) Shape (Shear Stress-Strain) Volume (Bulk Stress-Strain).

alice
Download Presentation

-Elastic Properties of Solids

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. -Elastic Properties of Solids AP Physics C Mrs. Coyle

  2. Real objects are not rigid but can deform under the influence of an external force. • Remember: Hooke’s Law F=-kx

  3. Elastic Properties of Solids • Length (Tensile Stress- Strain) • Shape (Shear Stress-Strain) • Volume (Bulk Stress-Strain)

  4. Elasticity of Length- Characteristics • Tensile Strain= Tensile Stress=F/A

  5. Elasticity in Length • Tensile Stress = Y x Tensile Strain • Y is known as Young’s Modulus • Units of Y are N/m2

  6. Tensile Strength Test • Tensile Strength Sample

  7. Ex: #30 • A steel wire of diameter 1mm can support a tension of 0.2kN. A cable to support a tension of 20kN should have a diameter of what order of magnitude? • Ans: 1cm

  8. Elasticity in Shape - Shear Stress= F / A

  9. Example: Shear Stress http://www.fema.gov/plan/prevent/earthquake/fema74/chapter2_2.shtm

  10. http://www.fema.gov/plan/prevent/earthquake/fema74/chapter2_2.shtmhttp://www.fema.gov/plan/prevent/earthquake/fema74/chapter2_2.shtm

  11. Shear Stress and Shear Strain S is the Shear Modulus, Unit : N/m2

  12. Ex: #33 If the shear stress in steel exceeds 4.00x108 N/m2 the steel ruptures. a)Determine the shearing force necessary to shear a steel bolt 1.00cm in diameter. Ans: a) 3.14x104 N

  13. Ex: #33 cont’d b)Determine the shearing force necessary punch a 1.00cm diameter hole in a steel plate 0.500cm thick. Ans: b) 6.28x104 N

  14. Elasticity in Volume B is the Bulk Modulus Unit: N/m2

  15. Note that ΔF/A is pressure.

  16. Ex:#35 When water freezes, it expands by about 9%. What pressure increase would occur inside your automobile engine block if the water in it froze? (The bulk modulus of ice is 2.00x109 N/m2 ) Ans: 1.65 x 108 N/m2

  17. Explaining the inertia ball tensions.

  18. How is ΔL affected when you have two same springs in series or in parallel pulled by the same force?

More Related