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Xtract
B-4
B 2.7
Sesam
1-FEB-2011
Program version 3.0
Result Attribute: PM-STRESS
This attribute contains the principal membrane stress components, i.e. principal stresses based on the membrane stress components only:
• P1 – the highest principal stress – membrane and shell elements
• P2 – the lowest principal stress – membrane and shell elements
Note: For membranes PM-STRESS components are equal to P-STRESS components.
See Section B 3.3 for information on the calculation of principal stresses.
B 2.8
Result Attribute: D-STRESS
This attribute contains the decomposed stress components, i.e. general stresses decomposed in membrane
and bending parts. This attribute is relevant for shell elements only.
• SIGMX (Mx) – membrane part of stress in the direction of the local x-axis
• SIGMY (My) – membrane part of stress in the direction of the local y-axis
• SIGBX (Bx) – bending part of stress in the direction of the local x-axis
• SIGBY (By) – bending part of stress in the direction of the local y-axis
• TAUMXY (Mxy) – membrane part of shear stress in the direction of the local x/y-axes
• TAUBXY (Bxy) – twisting part of shear stress in the direction of the local x/y-axes
• TAUBXZ (Bxz) – bending related shear stress in the direction of the local x/z-axes
• TAUBYZ (Byz) – bending related shear stress in the direction of the local y/z-axes
• MVONMISES – von Mises stress based on membrane stresses
See Section B 3.1 for information on the calculation of decomposed stresses.
B 2.9
Result Attribute: R-STRESS
This attribute contains the stresses integrated through the thickness, often referred to as stress resultants in
literature. This attribute is relevant for membrane and shell elements only.
• NXX – normal force per unit length in the direction of the local x-axis
• NXY – shear force per unit length in the membrane/shell surface (NYX = NXY)
• NXZ – shear force per unit length normal to the membrane/shell surface in a section normal to the local
x-axis