All true mayf but one of the variables in structures is the process used to
fabricate. Composites have a lot more variables in the fab process. I think
that is why F1,CART and IRL all require a sample chassis (or several) to
pass physical tests before approval.
Jim in Palmdale
> Malcolm,
> after a career in testing and designing stuff, take it from me...testing
is
> the most expensive way to deterine the properties of anything. I would say
> that finding someone commected with a design firm that uses SAP or NASTRAN
> structural design packages would be the best. The metal properties, or
even
> composite properties, can be input, with all the joint fixities and
various
> loads placed in different places to determine stress and strains. Then you
> modify and keep "testing" you design using the software until sufficient
> margins of safety are reached. This kind of design code has been used for
a
> very long time in such organizations as our NASA and Department of Defense
> and it is generally pretty accurate. But, lots of places have this, such
as
> building designers, bridge designers, airplane designers, universities. A
> little searching should lead you to someone who can help at a very nominal
> fee...or none at all if a university...
>
> mayf, the red necked ignorant desert rat in Pahrump...
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