Integrated output variables

This problem contains basic test cases for one or more Abaqus elements and features.

This page discusses:

Elements tested
Features tested
Problem description
Results and discussion
Input files

ProductsAbaqus/Explicit

Elements tested

PIPE21
PIPE31

C3D4
C3D6
C3D8
C3D8I
C3D8R
C3D10M

CPE4R
CPE6M
CPS3
CPS4R

M3D4R

S4
S4R
SC8R

T2D2
T3D2

Features tested

Output variables SOF and SOM give the total force and total moment transmitted across a given surface. This surface typically forms a cross-section cutting through a deformable continuum or structure. The area of the specified surface when projected along the average normal to that surface is given by output variable SOAREA. The vector output is given in the global basis, and the total moment is taken about the global origin by default. However, an integrated output section can be defined and associated with the integrated output request to obtain the output in a moving coordinate system and the total moment taken about an anchor point that may be translating and/or rotating.

Problem description

The integrated output variables can be requested only as history output to the output database. These variables are considered whole element set variables, meaning that the quantity requested is summed over the facets of the elements lying under the surface specified.

Each of the verification problems below models a region of given element type, and a number of cross-section-like surfaces are defined. A uniform initial stress is specified for the entire region. All the nodes of the region are then included in a rigid body that is constrained to undergo a large rotation. Under this rigid body motion the stresses should remain constant. Hence, the total force and the total moment vectors should correspond to the initial stresses and also remain constant. In addition, the integrated output is tested over surfaces through integrated output section definitions.

Results and discussion

These verification problems all impose a simple rigid body motion, and each contains the material under a specified initial stress. In all cases the integrated output based on the fixed stresses remains constant.

Input files

integratedoutput_b21.inp: Integrated output over a surface formed on the ends of a beam.
integratedoutput_b22.inp: Integrated output over a surface formed on the ends of a beam.
integratedoutput_b31.inp: Integrated output over a surface formed on the ends of a beam.
integratedoutput_b32.inp: Integrated output over a surface formed on the ends of a beam.
integratedoutput_p21.inp: Integrated output over a surface formed on the ends of a pipe.
integratedoutput_p31.inp: Integrated output over a surface formed on the ends of a pipe.
integratedoutput_c3d4.inp: Integrated output over a surface cutting through a solid.
integratedoutput_c3d6.inp: Integrated output over a surface cutting through a solid.
integratedoutput_c3d8.inp: Integrated output over a surface cutting through a solid.
integratedoutput_c3d8i.inp: Integrated output over a surface cutting through a solid.
integratedoutput_c3d8r.inp: Integrated output over a surface cutting through a solid.
integratedoutput_cpe4r.inp: Integrated output over a surface cutting through a solid.
integratedoutput_cpe6m.inp: Integrated output over a surface cutting through a solid.
integratedoutput_cps3.inp: Integrated output over a surface cutting through a solid.
integratedoutput_cps4r.inp: Integrated output over a surface cutting through a solid.
integratedoutput_m3d4r.inp: Integrated output over a surface cutting through a membrane.
integratedoutput_s4.inp: Integrated output over a surface cutting through a shell.
integratedoutput_s4r.inp: Integrated output over a surface cutting through a shell.
integratedoutput_sc8r.inp: Integrated output over a surface cutting through a continuum shell.
integratedoutput_t2d2.inp: Integrated output over a surface formed on the ends of a truss.
integratedoutput_t3d2.inp: Integrated output over a surface formed on the ends of a truss.