Deflection vs plate thickness
Deflection vs plate thickness
(OP)
rb1957 stated in another thread that
"if a plate deflects much more than it's thickness, then it probably isn't working as a plate, and more like a membrane"
Are there any further comments or points to be made about this statement? Discuss please.
"if a plate deflects much more than it's thickness, then it probably isn't working as a plate, and more like a membrane"
Are there any further comments or points to be made about this statement? Discuss please.





RE: Deflection vs plate thickness
corus
RE: Deflection vs plate thickness
jt
RE: Deflection vs plate thickness
RE: Deflection vs plate thickness
Linear small deflection theory can be used for large deflection problems in many instances. Imagine bending a plastic ruler it remains elastic and easily calculable for massive thickness/deflection ratios.
RE: Deflection vs plate thickness
RE: Deflection vs plate thickness
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Deflection vs plate thickness
RE: Deflection vs plate thickness
corus
RE: Deflection vs plate thickness
To take a simple example:
Consider a long beam. If it is very thin, the deflection at the centre of the beam can be many many multiples of the beam's depth, yet linearity, and FEA, will still work perfectly well.
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Deflection vs plate thickness
if i do a FE analysis of a thin plate, i'd want a non-linear analysis ... i personally don't like linear elements "fudged" for large displacements.
and corus ... "he" is just fine ... "he/she" whilst being politically correct, possibly expresses a dubious gender ambiguity (which i'm pretty sure i don't suffer from) ... sometimes i'll say "he, in the non-gender specific sense,".