What are interesting/cool topics about material deformation?

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SUMMARY

This discussion focuses on engaging topics related to material deformation and fracture, particularly in the context of microstructure. Key suggestions include the phenomenon of spaghetti breaking, where twisting can influence the fracture pattern, and the exploration of Nitinol, a shape memory alloy with unique applications. Additionally, auxetics are highlighted for their unusual behavior of thickening under tension and thinning under compression. These topics provide a captivating blend of scientific principles and practical implications.

PREREQUISITES
  • Understanding of material science concepts, particularly deformation and fracture mechanics.
  • Familiarity with microstructural analysis techniques.
  • Knowledge of shape memory alloys, specifically Nitinol.
  • Basic principles of auxetics and their mechanical properties.
NEXT STEPS
  • Research the mechanics of spaghetti breaking and the role of twisting in fracture patterns.
  • Explore the properties and applications of Nitinol as a shape memory alloy.
  • Investigate auxetic materials and their unique deformation characteristics.
  • Watch videos on shape-changing micro robots and bending machines to understand practical applications of deformation.
USEFUL FOR

Students, material scientists, and educators interested in the fascinating aspects of material deformation and fracture mechanics, particularly those seeking engaging presentation topics.

ENGBIO
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Hey guys, so I have to give a 10 minute presentation for my class. I am absolutely terrible at memorizing stuff. Its pretty bad. If I can find an interesting or cool topic I would be able to remember material better.
It needs to be about deformation or fracture of a material in terms of micro structure.

Are there any topics you guys know about the would be interesting to a lay person?
 
Engineering news on Phys.org
How about spaghetti breaking?

 
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More on spaghetti breaking where applying a twist can allow the spaghetti to break in two pieces instead of three or more:

 
ENGBIO said:
It needs to be about deformation or fracture of a material in terms of micro structure.
Have you learned about Nitinol yet ("shape memory alloy")? Very interesting material, with some unique applications...

https://www.memry.com/intro-to-nitinol

https://en.wikipedia.org/wiki/Nickel_titanium
 
What about auxetics ? They deform in opposite manner than regular materials - when subjected to tension they become thicker and when subjected to compression they become thinner.
 
Veritaseum had this video on shape changing micro robots:



and this one on bending machines:

 

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