Dr. Lawlor's Code, Robots, & Things

February 20, 2017

Materials Breaking: Collection of Videos

Filed under: Random Thoughts — Dr. Lawlor @ 3:06 pm

High magnification (electron microscope?) image of lathe tools turning various steels.  Steel’s deformation is ductile, like clay.

Ultra high speed footage of breaking glass, showing a brittle fracture that propagates at about half the speed of sound in glass (kilometers per second).

Even higher speed footage (500ns between frames) of plexiglass cracking:

Tensile stretching steel rebar to failure.  There is a lot of plastic deformation before the final break.

Without steel reinforcing, concrete fails in a brittle fashion, with cracks opening up in the areas in tension.

At supersonic velocity, a crash test dummy can obliterate a cinder block wall.

 

Advertisements

Leave a Comment »

No comments yet.

RSS feed for comments on this post. TrackBack URI

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Create a free website or blog at WordPress.com.

%d bloggers like this: