We covered a lot of content already! I plan on covering Destruction a few more days (probably 2 more days).
To take a breather for today, I just briefly want to discuss the difference between Ductile materials and Brittle materials!
Ductile Materials - These are materials that are able to undergo extensive amounts of plastic deformation before any sort of fracturing occurs. In other words, these are "tough" materials that absorb a lot of energy and are hard to break under high amounts of stress and strain. Examples of these materials include Copper, Steel, and Aluminum.
Brittle Materials - These are materials that can only endure relatively small amounts of plastic deformation before fracturing. In other words, these are "weak" materials that DON'T absorb much energy when placed under stress and can only endure a small amount of strain. These materials do deform elastically and plastically but only by very small amounts before fracturing. Examples include most glasses and ceramics.