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3/8/2002, Friday Toughness. Fracture Modes Stress Field Around Crack Tip.

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Presentation on theme: "3/8/2002, Friday Toughness. Fracture Modes Stress Field Around Crack Tip."— Presentation transcript:

1 3/8/2002, Friday Toughness

2 Fracture Modes

3 Stress Field Around Crack Tip

4 Stress Concentration

5 Crack Tip Stress Distribution

6 Stress Intensity Factor, K

7 Fracture Toughness, K IC

8 Crack Tip Plastic Zone

9 Fracture Process Zone

10 Concrete

11 Polymer Fracture - Craze

12 Polymer Yielding

13 Atomistic fracture pattern at different loading rate Low strain rate High strain rate dislocation cleavage H. Tan and W. Yang, Acta Mechanica Sinica co-existence of dislocations and cleavage embryo

14 Fiber Composite

15 Stress-Strain Curve


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