me 4733 deformation and fracture of engineering materials instructor: dr. honglai tan [email protected]...

11
ME 4733 Deformation and Fracture of Engineering Materials Instructor: Dr. Honglai Tan [email protected] ttp://me. lsu . edu /~tan/teaching/ defrac . h

Upload: alexis-barnett

Post on 28-Mar-2015

231 views

Category:

Documents


5 download

TRANSCRIPT

Page 2: ME 4733 Deformation and Fracture of Engineering Materials Instructor: Dr. Honglai Tan tan@me.lsu.edu tan/teaching/defrac.htm

Explosive cracking — simulationH. Tan, CSAFE annual report, 2001

Center for the Simulation of Accidental Fires and Explosions

Page 3: ME 4733 Deformation and Fracture of Engineering Materials Instructor: Dr. Honglai Tan tan@me.lsu.edu tan/teaching/defrac.htm

Explosive cracking — experiment

P.M. Dickson et al., Los Alamos National Laboratories

Ignition of PBX 9501 after first heated to 200°C inaround one hour and then ignited by hot wire at the center.

Page 4: ME 4733 Deformation and Fracture of Engineering Materials Instructor: Dr. Honglai Tan tan@me.lsu.edu tan/teaching/defrac.htm

Brown University

Nano & micromechanics Laboratory

Page 5: ME 4733 Deformation and Fracture of Engineering Materials Instructor: Dr. Honglai Tan tan@me.lsu.edu tan/teaching/defrac.htm

Course Outline

Page 6: ME 4733 Deformation and Fracture of Engineering Materials Instructor: Dr. Honglai Tan tan@me.lsu.edu tan/teaching/defrac.htm

Stress-strain curve

Page 7: ME 4733 Deformation and Fracture of Engineering Materials Instructor: Dr. Honglai Tan tan@me.lsu.edu tan/teaching/defrac.htm

Necking

Page 8: ME 4733 Deformation and Fracture of Engineering Materials Instructor: Dr. Honglai Tan tan@me.lsu.edu tan/teaching/defrac.htm

Fatigue Fracture

Cyclic stress

Page 9: ME 4733 Deformation and Fracture of Engineering Materials Instructor: Dr. Honglai Tan tan@me.lsu.edu tan/teaching/defrac.htm

Case study: how the World Trade Center fell

The design of the WTC saved thousands of lives by standing for well over an hour after the planes crashed into its twin towers.

High temperature for buckling and collapsing.

Page 10: ME 4733 Deformation and Fracture of Engineering Materials Instructor: Dr. Honglai Tan tan@me.lsu.edu tan/teaching/defrac.htm

Multiscale thinking

D. RaabeComputational Materials Science1998

Page 11: ME 4733 Deformation and Fracture of Engineering Materials Instructor: Dr. Honglai Tan tan@me.lsu.edu tan/teaching/defrac.htm

After class reading

Hertsburg

Course webpage