 Cutting hole into long... |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| rtalich |
 Nov 11 2009, 06:34 PM
Post
#1
|
|
Member  Group: Members Posts: 279 Joined: 25-September 06 From: Bellevue, WA Member No.: 6,913 Region Association: None  |
Help... Does anyone know if it would possible to cut a 3"x3" hole in the side of the passenger side long with NO effect to the structural integrity?
Thanks, Rob |
   |
 
|
  |
Replies(1 - 5)
| SirAndy |
Nov 11 2009, 06:42 PM
Post
#2
|
|
Resident German Group: Admin Posts: 41,688 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(rtalich @ Nov 11 2009, 04:34 PM)  possible to cut a 3"x3" hole in the side of the passenger side long with NO effect to the structural integrity? No. But the real question is, just how much will you weaken the structure and if marginal, does it matter? The factory added holes on the inside of the longs about the same size and plugged them with a chunk of tar. Obviously, they thought that was OK ... (IMG:style_emoticons/default/popcorn[1].gif) Andy |
|
|
|
| brer |
Nov 12 2009, 12:03 PM
Post
#3
|
|
Advanced Member Group: Members Posts: 2,555 Joined: 10-March 05 From: san diego Member No.: 3,736 Region Association: None |
stresses in the longs or any beam type contruct are not carried in the center of the vertical plane. Have a look at how a castellated (or cellular) beam is made for reference.
(IMG:http://www.asdwestok.co.uk/NR/rdonlyres/4C29529B-1C70-43E2-8B99-56CDC595F3B9/322/Graphic2.gif) You can hole the long, but i'm not saying a 3" hole in any location won't affect it. There are areas in the car that are higher stressed than others but I'm not the one who will tell you exactly where those are. I have an idea but i'll leave that to the people who have more experience repairing these chassis. |
|
|
|
| Katmanken |
Nov 14 2009, 05:21 PM
Post
#4
|
|
You haven't seen me if anybody asks... Group: Members Posts: 4,738 Joined: 14-June 03 From: USA Member No.: 819 Region Association: Upper MidWest |
Stress flows like water in a river.....
Cut a hole in the beam and it will flow aroud the hole..... Reduce the flow area with a hole and it will concentrate the stress in the material that is left...... Can we say failure/fold point??? VW used to drill holes along the side of the underside hood reinforcement (Rabbit) to force it to fold like an accordian duriing impact. Can we say energy absorption as it folds durign a crash???? |
|
|
|
| brer |
Nov 15 2009, 02:05 AM
Post
#5
|
|
Advanced Member Group: Members Posts: 2,555 Joined: 10-March 05 From: san diego Member No.: 3,736 Region Association: None |
i believe the tension on the bottom of the long is the critical condition. did you see the thread about the cracking long?
tension on the bottom, compression on the top is the rule. The centroid is a zero point, until you dynamically load it .... like in a racecar. |
|
|
|
| sean_v8_914 |
Nov 15 2009, 02:14 PM
Post
#6
|
|
Chingon 601 Group: Members Posts: 4,011 Joined: 1-February 05 From: San Diego Member No.: 3,541 |
dude, dont go poking speaker holes in your chassis...there, i said it.
...by the way, I weld up cracked 914s for a living |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 16th June 2024 - 04:26 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.