×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

What happens if you triangulate crumple zones?

What happens if you triangulate crumple zones?

What happens if you triangulate crumple zones?

(OP)
In the first image the read arrows pinpoint the aluminum crumple zones.

What would happen if you add some x-braces?
Depicted in red in the second image.

Also, do the holes drilled in the aluminum beams help deformation upon impact?

RE: What happens if you triangulate crumple zones?

Bracing will change the behaviour of the crumple zones. Whether that change is a good thing or a bad thing, would require substantial effort to establish. Given that modern vehicle bodyshells are already highly engineered with regards to crash structures, my money would be on the effect being bad.

The holes are almost certainly to control where the beams start deforming when subjected to crash forces (acting as a column). Crash structures very commonly have designed-in holes, folds, bends, etc., in order to control where and how the structure deforms.

And now for the big question ... Why are you interested in stiffening in the manner shown? All it's going to do during normal driving is to add weight to both ends of the vehicle (bad) and stiffen the bumper from moving sideways (irrelevant for any purpose that I can see). The places where stiffness matters are all between the wheels. Anything hanging out over the ends beyond where the suspension attaches to the chassis, doesn't matter so much ... except for crash structures.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources