Guest
Output and Interpretation GT STRUDL
Rev D 2.3.7 - 2 V 3
The results output using this command are located at different points depending on the
element type (CSTG, SBHQ6, etc.). Some elements output the result at all nodes of the element,
others at only the corner nodes, and a few elements output the results only at the centroid of the
element. The output location of each result for the various elements is indicated in the GTSTRUDL
element library presented in Table 2.3.1. PRINCIPAL STRESSES and PRINCIPAL STRAINS
are available for the PLANE STRESS/STRAIN elements only using the LIST command.
Interpretation of Results
The STRESSES, STRAINS, PRINCIPAL STRESSES, PRINCIPAL STRAINS, and
ELEMENT FORCES output using the LIST command are element type dependent. The
reference frame for the results is also dependent on the type of element, two-dimensional (PLANE
STRESS/STRAIN, AXISYMMETRIC STRESS, PLATE BENDING, PLATE) or three-dimensional
(TRIDIMENSIONAL). The reference frame for all two-dimensional elements is the
PLANAR element coordinate system. The location of the PLANAR coordinate system is
described in Section 2.3.2. The reference frame for all TRIDIMENSIONAL element results is
the GLOBAL coordinate system.
2.3.7.1.1 PLANE STRESS/STRAIN Results
The PLANE STRESS and STRAIN element results are output with respect to the
PLANAR element coordinate system. By using the LIST STRESSES form of the command, the
stresses SXX, SYY, and SXY (FORCE/LENGTH 2 ) are output at the available location for each
element type. Again, the available location of these results is described in Table 2.3.1. The
orientation of the positive normal stresses SXX and SYY and the positive shear stress SXY on a
unit area with the PLANAR coordinate system is shown in Figure 2.3.11(b). By using the LIST
STRAINS form of the command, the strains EXX, EYY, and EXY are also output at the locations
described in Table 2.3.1. The positive direction of the strains is the same as for the stresses.
The LIST PRINCIPAL STRESSES form of the command outputs the maximum and
minimum normal stresses, S1 and S2 (FORCE/LENGTH 2 ), the absolute value of the maximum
shear stress, TMAX, and an angle THETA. THETA is the angle from the PLANAR element
coordinate axis Xp to the direction along which S1 occurs. The measure of this angle is from Xp
to the axis of S1 with positive being a counterclockwise angle from Xp into the direction of S1.
This is illustrated on a differential area shown in Figure 2.3.12. The LIST PRINCIPAL STRAINS
Rev D 2.3.7 - 2 V 3
The results output using this command are located at different points depending on the
element type (CSTG, SBHQ6, etc.). Some elements output the result at all nodes of the element,
others at only the corner nodes, and a few elements output the results only at the centroid of the
element. The output location of each result for the various elements is indicated in the GTSTRUDL
element library presented in Table 2.3.1. PRINCIPAL STRESSES and PRINCIPAL STRAINS
are available for the PLANE STRESS/STRAIN elements only using the LIST command.
Interpretation of Results
The STRESSES, STRAINS, PRINCIPAL STRESSES, PRINCIPAL STRAINS, and
ELEMENT FORCES output using the LIST command are element type dependent. The
reference frame for the results is also dependent on the type of element, two-dimensional (PLANE
STRESS/STRAIN, AXISYMMETRIC STRESS, PLATE BENDING, PLATE) or three-dimensional
(TRIDIMENSIONAL). The reference frame for all two-dimensional elements is the
PLANAR element coordinate system. The location of the PLANAR coordinate system is
described in Section 2.3.2. The reference frame for all TRIDIMENSIONAL element results is
the GLOBAL coordinate system.
2.3.7.1.1 PLANE STRESS/STRAIN Results
The PLANE STRESS and STRAIN element results are output with respect to the
PLANAR element coordinate system. By using the LIST STRESSES form of the command, the
stresses SXX, SYY, and SXY (FORCE/LENGTH 2 ) are output at the available location for each
element type. Again, the available location of these results is described in Table 2.3.1. The
orientation of the positive normal stresses SXX and SYY and the positive shear stress SXY on a
unit area with the PLANAR coordinate system is shown in Figure 2.3.11(b). By using the LIST
STRAINS form of the command, the strains EXX, EYY, and EXY are also output at the locations
described in Table 2.3.1. The positive direction of the strains is the same as for the stresses.
The LIST PRINCIPAL STRESSES form of the command outputs the maximum and
minimum normal stresses, S1 and S2 (FORCE/LENGTH 2 ), the absolute value of the maximum
shear stress, TMAX, and an angle THETA. THETA is the angle from the PLANAR element
coordinate axis Xp to the direction along which S1 occurs. The measure of this angle is from Xp
to the axis of S1 with positive being a counterclockwise angle from Xp into the direction of S1.
This is illustrated on a differential area shown in Figure 2.3.12. The LIST PRINCIPAL STRAINS
