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Foaming the chassis
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<blockquote data-quote="Redd" data-source="post: 114024" data-attributes="member: 200"><p>sorry to rehash an old (and possibly sensitive) topic, but i thot the info was worth passing on. </p><p></p><p>the following info was recently posted at the italiaauto.com forum. the author crash tests cars for a living (the engineering team, not in the car <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /> ) so his info is reliable.</p><p></p><p>the full thread is here:</p><p></p><p><a href="http://www.italiaauto.com/forum/viewtopic.php?t=4944" target="_blank">http://www.italiaauto.com/forum/viewtopic.php?t=4944</a></p><p></p><p>but the short of it is this:</p><p></p><p>Twin_Sparx :-</p><p><em>Ok, if its done at the factory, then MAYBE its ok...cant say for sure. </em></p><p><em></em></p><p><em>I've had experience working with stuffing foam (similar to Autofoam) into the A and B pillars when we were trying to improve the crashworthiness of a certain vehicle . </em></p><p><em></em></p><p><em>What I found was, if not done properly, not only did it clog up hidden drainage holes (as expected), it varied the cross sectional stiffness very unpredictably. </em></p><p><em></em></p><p><em>In the A-pillar, just lining the inner cavity of the pillar inner and outer reinforcements made it almost 50% stiffer. Good? Lets say I spent about 6 months running simulations to optimise the size of the foam block inside the cavity to enhance the structural stiffness and provide the proper 'folding mechanism' of the pillar upon impact. </em></p><p><em></em></p><p><em>Its even worse in the B-pillar and side sill. Most B-pillars have a hinge location where the pillar is designed to buckle when T-boned. The sill is also allowed to fold upon itself...ie, outer crushes into inner sill. </em></p><p><em></em></p><p><em>You'd be surprised.... it may seem like not a big deal when you look at how soft the foam is, but stuffing A & B-pillars and sills with it will alter the crashworthiness of your vehicle quite significantly. So, instead of folding up and crushing systematically as designed by Alfa crashworthiness team, you're in better chance of getting it randomly mangled. </em></p><p></p><p>so good luck autofoaming ur car.</p><p></p><p>redd</p></blockquote><p></p>
[QUOTE="Redd, post: 114024, member: 200"] sorry to rehash an old (and possibly sensitive) topic, but i thot the info was worth passing on. the following info was recently posted at the italiaauto.com forum. the author crash tests cars for a living (the engineering team, not in the car ;) ) so his info is reliable. the full thread is here: [url=http://www.italiaauto.com/forum/viewtopic.php?t=4944]http://www.italiaauto.com/forum/viewtopic.php?t=4944[/url] but the short of it is this: Twin_Sparx :- [i]Ok, if its done at the factory, then MAYBE its ok...cant say for sure. I've had experience working with stuffing foam (similar to Autofoam) into the A and B pillars when we were trying to improve the crashworthiness of a certain vehicle . What I found was, if not done properly, not only did it clog up hidden drainage holes (as expected), it varied the cross sectional stiffness very unpredictably. In the A-pillar, just lining the inner cavity of the pillar inner and outer reinforcements made it almost 50% stiffer. Good? Lets say I spent about 6 months running simulations to optimise the size of the foam block inside the cavity to enhance the structural stiffness and provide the proper 'folding mechanism' of the pillar upon impact. Its even worse in the B-pillar and side sill. Most B-pillars have a hinge location where the pillar is designed to buckle when T-boned. The sill is also allowed to fold upon itself...ie, outer crushes into inner sill. You'd be surprised.... it may seem like not a big deal when you look at how soft the foam is, but stuffing A & B-pillars and sills with it will alter the crashworthiness of your vehicle quite significantly. So, instead of folding up and crushing systematically as designed by Alfa crashworthiness team, you're in better chance of getting it randomly mangled. [/i] so good luck autofoaming ur car. redd [/QUOTE]
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