Chapter9_lectures-1

Chapter9_lectures-1 - Chapter 9- Mechanical Properties...

Info iconThis preview shows pages 1–16. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 9- Mechanical Properties Introduction Deformation and Fracture Brittle Fracture Fatigue Time Dependent Deformation Fracture Toughness
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Titanic
Background image of page 2
Titanic Charpy Tests Modern Steel Steel from the Titanic Part of the energy of the fracture process goes into the plastic deformation of the material during fracture. The more energy absorbed the high will be the toughness of the material.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
Spaceship Columbia
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
737 Aloha Airlines Incident
Background image of page 6
Types of Mechanical Tests Smooth specimens Tensile Three/four point bend Notched specimens Hardness Fatigue Time-dependent deformation Fracture mechanics
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Tensile Testing Specimen geometry Test rig
Background image of page 8
Elastic Deformation
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
t a t o a o d d l l ε ν = - = = where and Poisson’s Ratio 2(1 ) E G = + For an isotropic material
Background image of page 10
Tensile Testing Loading Unloading Permanent plastic deformation Recoverable elastic deformation
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Tensile Testing Onset of Necking or plastic instability Reduction in stress
Background image of page 12
Tensile Testing Formation of the neck begins and continues to propagate through the gage until failure.
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
True Engineering Tensile Testing
Background image of page 14
Tensile Testing Typical FCC Metal Like Aluminum Typical Behavior for Carbon Steels
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 16
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 39

Chapter9_lectures-1 - Chapter 9- Mechanical Properties...

This preview shows document pages 1 - 16. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online