neusun001
New member
- Feb 13, 2013
- 4
Hello!
I'm new to finite element method, I'm trying to learn how it works. I've started with a plate model, tried implementing mindlin reissner plate in xy plane, with 5 DOF (u,v,w,theta_x,theta_y). I made the element, connectivity and calculated displacements. I could match diplacements with that of Nastran's for the plate. However, I'm running into problems with matching stresses.
I'm doing:
strain = B*displacements;
stress = D*strains;
While calculating the Element model, I had a B matrix for axial, one for bending mode, one for shear mode. So I took the B matrix for calculating strains as B = B_axial+B_bending+B_shear.
However, in this place, the results are weird. Any ideas why?
Many thanks for your help.
I'm new to finite element method, I'm trying to learn how it works. I've started with a plate model, tried implementing mindlin reissner plate in xy plane, with 5 DOF (u,v,w,theta_x,theta_y). I made the element, connectivity and calculated displacements. I could match diplacements with that of Nastran's for the plate. However, I'm running into problems with matching stresses.
I'm doing:
strain = B*displacements;
stress = D*strains;
While calculating the Element model, I had a B matrix for axial, one for bending mode, one for shear mode. So I took the B matrix for calculating strains as B = B_axial+B_bending+B_shear.
However, in this place, the results are weird. Any ideas why?
Many thanks for your help.
