iMechanica - pure bending - Comments

HI SIR, I have one

Hardik kumar — Thu, 08 May 2008 05:07:05 -0400

HI SIR,

I have one confusion about anostropic material ,How can we find nutural plane location in bi-metal plate.we can consider same as isotropic material criteria for this?.And is it possible to simulate isotropic material in ABAQUS?

file attached

Rui Huang — Tue, 29 Apr 2008 23:40:47 -0400

Please see the file attached to your original post.

isotropic....

Hardik kumar — Tue, 29 Apr 2008 22:33:48 -0400

Sorry,sir,

(Rui Huang)

Its fully my mistake, its actually isotropic Material.and Thx for your co-operation.My email - hkpa@deakin.edu.au

isentropic or isotropic?

Rui Huang — Tue, 29 Apr 2008 16:15:05 -0400

Hardik,

What do you mean by "isentropic material"? If you mean "isotropic", I can send you a formula to calculate the location of nuetral plane for bilayered plates, again under the condition of homogeneous Poisson's ratio, if you give me your email address.

Pure Bending.(isentropic Material)

Hardik kumar — Tue, 29 Apr 2008 03:13:47 -0400

How to find the location of nutural plane from the Bimetal layered plate subjected to Pure bending??.And on what basis its changing in layered materia(isentropic material e.g-Mg?Thx ...............

I am doing my final year project "FEA (ABAQUS)Layered plate analysis under pure bending"and its similarity and problem with practical and simulation results.

neutral plane

Rui Huang — Sun, 27 Apr 2008 11:55:00 -0400

I would like to point out that the concept of neutral plane should be used with caution for two-dimensional bending of multilayered plates. The references given above considered only one-dimensional bending, like the classical beam theory, in which case the neutral plane can be defined with no ambiguity. For two-dimensional bending (with two non-zero principal curvatures) of multilayered plates, however, an ideal neutral plane (with zero in-plane strain in all directions) does not exist, unless all the layers are isotropic, linear elastic with identical Poisson's ratios.

You could found it in the book.

Ying Li — Sun, 27 Apr 2008 08:54:34 -0400

You could found it from the book "Mechanics of Materials"

Or from the appendix III in "Suo, Z., Hutchinson, J.W., 1990. Interface crack between two elastic layers. Int. J. Fracture 43,1-18."

Ying Li Department of Engineering Mechanics Tsinghua University Beijing, 100084, P. R. CHINA

Re: Layered Material

Zhigang Suo — Sun, 27 Apr 2008 07:14:00 -0400

This is a classical problem and there are many papers on the subject. Here is one that might get you started:

Z. Suo, E.Y. Ma, H. Gleskova and S. Wagner, Mechanics of rollable and foldable film-on-foil electronics. Appl. Phys. Lett. 74, 1177 (1999).