Section force componets (SF)
Section force componets (SF)
(OP)
Hi all,
When all section force and moment components are printed in the .DAT file this is what I get:
ELEMENT PT FOOT- SF1 SF2 SF3 SF4 SF5 SF6 SM1 SM2 SM3
NOTE
(I´m using S4R shell elements)
Why appear 6 force components? (I thought that only 3 components should
appear, like with the moments)
What do these 6 components mean?
Thanks all
When all section force and moment components are printed in the .DAT file this is what I get:
ELEMENT PT FOOT- SF1 SF2 SF3 SF4 SF5 SF6 SM1 SM2 SM3
NOTE
(I´m using S4R shell elements)
Why appear 6 force components? (I thought that only 3 components should
appear, like with the moments)
What do these 6 components mean?
Thanks all





RE: Section force componets (SF)
From ABAQUS Analysis User's Manual
->23.6.7 Three-dimensional conventional shell element library
"Section forces, moments, and transverse shear forces
Available for elements with displacement degrees of freedom.
SF1 Direct membrane force per unit width in local 1-direction.
SF2 Direct membrane force per unit width in local 2-direction.
SF3 Shear membrane force per unit width in local 1–2 plane.
SF4 Transverse shear force per unit width in local 1-direction (available only for S3/S3R, S3RS, S4, S4R, S4RS, S4RSW, S8R, and S8RT).
SF5 Transverse shear force per unit width in local 2-direction (available only for S3/S3R, S3RS, S4, S4R, S4RS, S4RSW, S8R, and S8RT).
The section force SF6, which is the integral of S33 through the shell thickness, is reported only for finite-strain shell elements and is zero because of the plane stress constitutive assumption. The total number of attributes written to the results file for finite-strain shell elements is 9; SF6 is the sixth attribute
SM1 Bending moment force per unit width about local 2-axis.
SM2 Bending moment force per unit width about local 1-axis.
SM3 Twisting moment force per unit width in local 1–2 plane."
RE: Section force componets (SF)
RE: Section force componets (SF)
After reading the documentation I have a question : I´m using S4R shell elements and I want to get the element section forces and moments (3 forces + 3 moments) like when you write " FORCE(SORT1,REAL,BILIN)=ALL " in the .BDF file in NASTRAN. How can I do this????
Because after reading the documentation I´ve realised that this components I get when SF is printed in the .DAT, are not the same that I get with NASTRAN (Except SF1 that coincides with NASTRAN´s Fx)
Thanks
RE: Section force componets (SF)
Thanks all for your answers.