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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Rocky, rooty trail settings.
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[QUOTE="James Dean, post: 24626, member: 18501"] I aggree with the suggestion to use percentage changes in stiffness. I could run a structural finite element model in NASTRAN to determine deflection based on pressure, but it's not worth it. For example, try graphing an estimated force vs. deflection with using the stiffness ratio of an existing to proposed thickness cubed and then also factored by existing to proposed lenghth of overhang cubed. To keep it simpler a tapered HS stack might need to be considered an average of the mix in thicknesses and diameters. Keeping in mind the outer edge is where the LS stack contacts the HS stack. To compare the stock 6 shims, 24X.1mm thick, and a 14mm crossover to 3 shims, 24X.15, and a 12mm crossover, what to do?? 3/6= .5 -fewer shims (.15/.10)**3= 3.38 -thicker shims [(24-14)/(24-12)]**3= .579 -smaller crossover diameter .5 X 3.38 X .579 = .99 -result of combination Is the resulting stack the same?? Maybe yes, maybe no -but should be close. At least the relationships go the right directions. [img]http://dirtrider.net/ubb2/confused.gif[/img] James [This message has been edited by James Dean (edited 11-15-2000).] [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Rocky, rooty trail settings.
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