kevin2002
Structural
- Aug 4, 2002
- 6
Hi,
I have created a 4-ply (30/30)s composite laminated model in Abaqus using layers of 20-noded brick elements and the model was subjected to uniform pressure at the bottom surface. But, the resulting transverse shear stress distribution TaoXZ is not what I'm expecting. The figures below illustrate them where 0 indicates the point of zero stresses.
0 (expected) 0 (resulting)
__
\ /
\__ /_____
\ __/ _____/
/ __/
The material properties is defined using anisotropic type, so the stresses will be plotted in the global direction. I have double checked their definition and there is no problem with this. Also the stresses is plotted at the centre line of the 3D laminated plate and they are many times the width away from discontinuies, e.g fixed end, and sufficiently far away from free edges. So i will expect the stress should decay to what can be determined using lamination theories or equilibrium equations, i.e. the expected stress distribution should be as shown above.
Is that something regarding interlaminar effects that ideal lamination theories have neglected? Any suggestion by someone with expertise in this area is greatly appreciated. Thank you.
Kevin
I have created a 4-ply (30/30)s composite laminated model in Abaqus using layers of 20-noded brick elements and the model was subjected to uniform pressure at the bottom surface. But, the resulting transverse shear stress distribution TaoXZ is not what I'm expecting. The figures below illustrate them where 0 indicates the point of zero stresses.
0 (expected) 0 (resulting)
__
\ /
\__ /_____
\ __/ _____/
/ __/
The material properties is defined using anisotropic type, so the stresses will be plotted in the global direction. I have double checked their definition and there is no problem with this. Also the stresses is plotted at the centre line of the 3D laminated plate and they are many times the width away from discontinuies, e.g fixed end, and sufficiently far away from free edges. So i will expect the stress should decay to what can be determined using lamination theories or equilibrium equations, i.e. the expected stress distribution should be as shown above.
Is that something regarding interlaminar effects that ideal lamination theories have neglected? Any suggestion by someone with expertise in this area is greatly appreciated. Thank you.
Kevin