Lecture16%20with%20slides

Lecture16%20with%20slides - Fracture Lecture 16...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 1 Lecture 16 Fracture-1 2 Ship-loading from waves. Computer chip-cyclic thermal loading. Hip implant-cyclic loading from walking. Adapted from Fig. 22.30(b), Cal ister 7e. (Fig. 22.30(b) is courtesy of National Semiconductor Corporation.) Adapted from Fig. 22.26(b), Cal ister 7e. Adapted from chapter-opening photograph, Chapter 8, Cal ister 7e. (by Neil Boenzi, The New York Times .) Fracture 3 Confused terms Stiffness: Deformation caused by applied load or stress Strength: Maximum load or strength that can be supported without yield or fracture Yield: Permanent deformation in response to a shear stress Fracture: Separation of material into two or more bits 4 Fracture mechanisms • Ductile fracture – Occurs with plastic deformation • Brittle fracture – Little or no plastic deformation – Catastrophic 5 Ductile fracture Fracture that occurs after macroscopic yield X σ ε X σ ε 6 Brittle (cleavage) fracture X stress strain elastic deformation fracture before yield σ f Occurs by propagation of a crack (can be transgranular or intergranular )
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 7 Ductile vs Brittle Failure Very
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

Lecture16%20with%20slides - Fracture Lecture 16...

This preview shows document pages 1 - 3. Sign up to view the full document.

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