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Foaming the chassis
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<blockquote data-quote="Jules" data-source="post: 69312" data-attributes="member: 88"><p>wah veli hot topic one here......<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>Lee, must take a ride in ur car-loh......</p><p></p><p>Guys,</p><p>If I may speak from an Engineer's point of view......i think foaming will do wonders for NVH issues and as mentioned by a forumer, required for ICE fans. </p><p></p><p>For chassis strutural rigidity improvement, IMHPO minimal advantage will be gained. Foam, in the forms I know has a lower modulus of elasticity/compression(E)/shear(G) than steel, hence deflects more, shears easier than steel.</p><p></p><p>Placed inside the cavity of a car chassis - as said above I can expect minimal assistance to the structural strength of the chassis - if they are strategically placed on load bearing members. ( ie. if you do it inside the doors, zero improvement for chassis rigidity due to the support system )</p><p></p><p>In terms of improving the crash resistance with foaming - minimal again is the gain here. Personally, making a "solid" car can actually kill the occupants since the crash energy is at best dissipated to anything other than the occupants - Redd already explained this more scientifically than me.</p><p></p><p>Whilst I am also trying to understand how foaming can give all the wonders the forumers have listed - can it be that the MUCH reduced NVH has not given you the sensory input ( especially the less NOISE ) that the car is more rigid, secure & handles better? Foaming may have dulled also some vibrations, all good things to achieve in a car.</p><p></p><p>Having said all the above - if your butt and SENSORY receptors perceives this to be a good mod, by all means. It's at the end your money, your ride, pride & joy.</p><p></p><p>Anyway, where's Bundy? He's the better engineer than me and may have another opinion...<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>cheers & surely just my 2 cents. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Jules, post: 69312, member: 88"] wah veli hot topic one here......:) Lee, must take a ride in ur car-loh...... Guys, If I may speak from an Engineer's point of view......i think foaming will do wonders for NVH issues and as mentioned by a forumer, required for ICE fans. For chassis strutural rigidity improvement, IMHPO minimal advantage will be gained. Foam, in the forms I know has a lower modulus of elasticity/compression(E)/shear(G) than steel, hence deflects more, shears easier than steel. Placed inside the cavity of a car chassis - as said above I can expect minimal assistance to the structural strength of the chassis - if they are strategically placed on load bearing members. ( ie. if you do it inside the doors, zero improvement for chassis rigidity due to the support system ) In terms of improving the crash resistance with foaming - minimal again is the gain here. Personally, making a "solid" car can actually kill the occupants since the crash energy is at best dissipated to anything other than the occupants - Redd already explained this more scientifically than me. Whilst I am also trying to understand how foaming can give all the wonders the forumers have listed - can it be that the MUCH reduced NVH has not given you the sensory input ( especially the less NOISE ) that the car is more rigid, secure & handles better? Foaming may have dulled also some vibrations, all good things to achieve in a car. Having said all the above - if your butt and SENSORY receptors perceives this to be a good mod, by all means. It's at the end your money, your ride, pride & joy. Anyway, where's Bundy? He's the better engineer than me and may have another opinion...:) cheers & surely just my 2 cents. :) [/QUOTE]
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