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Simple Question About Shell constituitve ( ABD) matrix

Simple Question About Shell constituitve ( ABD) matrix

Simple Question About Shell constituitve ( ABD) matrix

(OP)
Hi All

First I would like to know that for shell (and plates?) we use and define ABD matrix like laminates or not ? is it correct that in ABD matrix calculation in the integral , in a laminate , we put the transformed matrix that it's stresses are along the fibers , cause the stresses in that direction matters

and in shell we use the stiffness matrix as it is in solid condition ?

the matrial is orthotropic

and in case that we calcualte ABD matrix , how we input it for example in Abaqus ?

as I am reading here , on page 15 I see :

http://www.colorado.edu/engineering/CAS/courses.d/...

but the matrix is defined 6 * 6 and I think in shell with one layer we shoul not talk about ABD so ?

but here in this paper

http://www.enu.kz/repository/2010/AIAA-2010-2706.p...

on page 4 , the ABD matrix is 8 * 8

what is taken into consideration and why is it called ABD here then ??!!

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