Fracture toughness and Impact Strength | Dental Materials

In this video Dr. Mujtaba Shaikh talks about the concept of Fracture Toughness and Impact Strength, related to Dental Materials.

The book followed for all the lectures of Dental Materials is, Applied Dental Materials Science by Mc Cabe.
Buy your textbook of Applied Dental Materials today, if you still haven't.
Here's the link:
https://amzn.to/4dg3OqL

We are currently on Chapter 2, which is the Properties Used to Characterize Dental Materials.

Quiz:

Q.1. How do we rule out external factors like air abrasion and friction during Charpy Impact Testing?
(a) By creating a notch in specimen
(b) Through a dummy run on the machine
(c) By subtracting estimated values after the test

Q.2. Out of the following, which type of material would have lesser values of fracture toughness?
(a) Ductile material
(b) Elastic material
(c) Malleable material
(d) Brittle material

Q.3. If a material falls on the floor from a noticeable height and fractures right away, it would have?
(a) greater impact strength
(b) lesser impact strength
(c) greater fracture toughness
(d) lesser fracture toughness

Q.4. Crack propagation may influence a material by:
(a) increasing fracture toughness
(b) decreasing fracture toughness

Q.5. If a test specimen fractures after intentionally introducing a v-shape dent or cracks, it is called a:
(a) Plastic material
(b) Elastic material
(c) Weak material
(d) Notch-sensitive material

Sources:
Charpy Impact tester video:    • Charpy Impact Test  
Charpy Impact tester image: https://www.totalmateria.com/page.asp...
Charpy Notch image: https://www.impact-solutions.co.uk/im...

Disclaimer:
Please note that the graphics, pictures and additional video contents used are not an intellectual property of The Dentalist and are only added for educational purposes, with no intention to violate copyrights.