anticlastic curvature

Hi all, i'm looking for informations about an effect called "anticlastic curvature". I know that bending a strip of a material which have young module and
poisson ratio function of direction, it arise a secondary curvature, in direction perpendicular to the one of main bending. This effect is called "anticlastic bending". Is this correct? Where can i find other informations? How can i calculate equation of deformed surface ?
I need to make FEM simulations of this effect into a bent silicon strip of dimensions 70x1x2mm. Can someone suggest me a software which can simulate anticlastic curvature? It seams this software should take in account for that young module and poisson ratio are function of direction, is this correct ? Here are young and poisson for silicon: young:
http://www.ioffe.rssi.ru/SVA/NSM/Semicond/SiGe/figs/wortman651_SiGe.gif
poisson:
http://www.ioffe.rssi.ru/SVA/NSM/Semicond/SiGe/figs/wortman652_SiGe.gif
Thanks in advance for any informations, Andrea
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Andrea wrote:

S. P. Timoshenko and J. N. Goodier, Theory of Elasticity, (McGraw Hill, 1982) 3rd Ed (or any edition, actually)
It (anticlastic bending curvature) occurs in isotropic materials, as well as anisotropic materials. It also occurs in plastic bending of beams.
Use the index to get the page number.
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thanks for the useful reference. Any informations about how to model a material which have young and poisson moduls function of direction (like silicon) in a Finite element model ? Which softwarre could provide this feature ?
Best regards? Andrea
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Andrea wrote:

You will get better response in a solid mechanics oriented group or a finite element group.
Materials as in sci.materials probably doesn't mean the same thing as materials does to you.
However, most modern commercial finite element codes have adequate anisotropic modeling capabilities to do what you are asking. After all, composite materials, wood and plywood are now commonplace engineering materials and these are all anisotropic (meaning the elastic properties vary with direction - as they would in cubic single crystal materials such as silicon).
I think you need a more advanced formal background in solid mechanics and continuum mechanics. Just running codes isn't going to give that to you.
Good luck.
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