Children Attack #2
Please read Tim Baird’s comment to the post “Children Attack” to get the background needed to best understand this entry.
Disclaimer: The following experiment took 18 minutes of company time. As a result, I will work an additional 18 minutes this evening to make up for the time spent doing these tests.
I ended up modeling a quick person, and then I submit that person to a 9000 N force to the face. I took the material of the person as a stiff homogeneous material (nylon), in real life the results would likely be considerably different because a persons body is much more bendy and isn’t made of Nylon. But this will give us a decent feel for what sort of static strain will result from such a blow. My test kid is about 5 feet tall.
Step 1 required me to place the model into the FEA program and create a mesh. I used a very coarse mesh because I didn’t want the analysis to take too long.
In step 2, I assigned the material Nylon to the body, and then made the feet ‘fixed’ and defined my force to be right in the target’s face. Here I make the assumption that I would be accurate in my assault.
Step 3 is simply a screen shot of the running test window.
Step 4 shows a graphical representation of the deformation of our test subject. Notice the significant bend resulting from the impact.
Finally, step 5 shows the Static strain. Notice the concentrated force in the subject’s neck and left foot (weird…). It is likely that the neck and feet (if they were truly fixed) would be those body parts most damaged by a Roundhouse Kick planted on the target’s face.
Authored by: mike d.
