![]() |
|
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. |
|
![]() |
Beebo Kanelle |
![]()
Post
#1
|
Member ![]() ![]() Group: Members Posts: 248 Joined: 22-November 12 From: Houston, Texas Member No.: 15,177 Region Association: Southwest Region ![]() ![]() |
Has anybody here used structural foam on their 914 to increase structural rigidity?
Here is the original Abstract of that SAE paper 1999-01-1785 "Stability and structural integrity are extremely important in the design of a vehicle. Structural foams, when used to fill body cavities and joints, can greatly improve the stiffness of the vehicle, and provide additional acoustical and structural benefits.This study involves modal testing and finite element analysis on a Sport utility vehicle to understand the effect of structural foam on modal behavior. The modal analysis studies are performed on this vehicle to investigate the dynamic characteristics, joint stiffness and overall body behavior. A design of experiments (DOE) study was performed to understand how the foam's density and placement in the body influences vehicle stiffness. Prior to the design of experiments, a design sensitivity analysis (DSA) was done to identify the sensitive joints in the body structure and to minimize the number of design variables in the DOE Study." And the Conclusion: "The most sensitive area of the body were found to be the A-pillar, the D-pillar and their joints. With structural foam injected into this sensitive areas, the vehicle body was significantly stiffened, as shown by the increase in modal frequencies. The 1st torsional mode was most effected with an increase of 29.1% in modal frequency.The design sensitivity analysis and design of experiments described here, can be used to identify the sensitive ares of the body structure. This results are useful in the determining the best application locations for structural foam." |
![]() ![]() |
914forme |
![]()
Post
#2
|
Times a wastin', get wrenchin'! ![]() ![]() ![]() ![]() Group: Members Posts: 3,896 Joined: 24-July 04 From: Dayton, Ohio Member No.: 2,388 Region Association: None ![]() ![]() |
@jss297 See the post above Beebo Kanelle has a question? Beebo you can send a notification to a user by using the @Username, does not work for you as you have a space in your name.
hope that helps you get the answer your looking for. Foam in older cars not good idea. I am a firm believer in foam for structural enhancement, it is used all the time in Marine applications. I used it on the retoration of my boat, installed drain channels into the bilge and then foamed all under deck cavities. But it is fiberglass with wood stringers, and a 3/4" pressure treated deck. I never want to go back and redo the floor on that boat. I will most likely purchase a different one, and it will most likely have a floor made of pulp, and do it all again. (IMG:style_emoticons/default/headbang.gif) Foam in a car that has rust = bad idea, and all 914s have rust, unless acid dipped metal repaired, proper holes installed and the EDM coated. Also if you foam the logs, you will crush the paper tubes that are in there to keep the heat going in the proper direction. |
![]() ![]() |
![]() |
Lo-Fi Version | Time is now: 16th June 2024 - 02:00 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |