Cylindrical Surface Element Library

This section provides a reference to the cylindrical surface elements available in Abaqus/Standard.

This page discusses:

See Also
Surface Elements
In Other Guides
*SURFACE SECTION
*REBAR LAYER

Products Abaqus/Standard

Element Types

SFMCL6

6-node cylindrical surface

SFMCL9

9-node cylindrical surface

Active Degrees of Freedom

1, 2, 3

Additional Solution Variables

None.

Nodal Coordinates Required

X, Y, Z

Element Property Definition

Input File Usage

Use the following option to define surface element properties:

            
              SURFACE SECTION

If rebar are being defined, use the following option in conjunction with the SURFACE SECTION option:

            
              REBAR LAYER

Use the following option to define a mass density per unit area:

SURFACE SECTION, DENSITY=number

Element-Based Loading

Distributed Loads

Distributed loads are specified as described in Distributed Loads. Gravity, centrifugal, rotary acceleration, and Coriolis force loads apply only if the surface elements have rebar defined or if the elements have a defined density.

*dload
  1. Load ID (*DLOAD): BX
  2. FL−3

  3. Body force in the global X-direction.

  1. Load ID (*DLOAD): BY
  2. FL−2

  3. Body force in the global Y-direction.

  1. Load ID (*DLOAD): BZ
  2. FL−2

  3. Body force in the global Z-direction.

  1. Load ID (*DLOAD): BXNU
  2. FL−2

  3. Nonuniform body force in the global X-direction with magnitude supplied via user subroutine DLOAD.

  1. Load ID (*DLOAD): BYNU
  2. FL−2

  3. Nonuniform body force in the global Y-direction with magnitude supplied via user subroutine DLOAD.

  1. Load ID (*DLOAD): BZNU
  2. FL−2

  3. Nonuniform body force in the global Z-direction with magnitude supplied via user subroutine DLOAD.

  1. Load ID (*DLOAD): CENT
  2. FL−3(ML−2 T−2)

  3. Centrifugal load (magnitude is input as ρ⁢ω2, where ρ is the mass density per unit area, ω is the angular speed).

  1. Load ID (*DLOAD): CENTRIF
  2. T−2

  3. Centrifugal load (magnitude is input as ω2, where ω is the angular speed).

  1. Load ID (*DLOAD): CORIO
  2. FL−3T (ML−2 T−1)

  3. Coriolis force (magnitude is input as ρ⁢ω, where ρ is the mass density per unit area, ω is the angular speed). The load stiffness due to Coriolis loading is not accounted for in direct steady-state dynamics analysis.

  1. Load ID (*DLOAD): GRAV
  2. LT−2

  3. Gravity loading in a specified direction (magnitude is input as acceleration).

  1. Load ID (*DLOAD): HP
  2. FL−2

  3. Hydrostatic pressure applied to the element reference surface and linear in global Z. The pressure is positive in the direction of the positive element normal.

  1. Load ID (*DLOAD): P
  2. FL−2

  3. Pressure applied to the element reference surface. The pressure is positive in the direction of the positive element normal.

  1. Load ID (*DLOAD): PNU
  2. FL−2

  3. Nonuniform pressure applied to the element reference surface with magnitude supplied via user subroutine DLOAD.

  1. Load ID (*DLOAD): ROTA
  2. T−2

  3. Rotary acceleration load (magnitude is input as α, where α is the rotary acceleration).

  1. Load ID (*DLOAD): TRSHR
  2. FL−2

  3. Shear traction on the element reference surface.

  1. Load ID (*DLOAD): TRSHRNU (S)
  2. FL−2

  3. Nonuniform shear traction on the element reference surface with magnitude and direction supplied via user subroutine UTRACLOAD.

  1. Load ID (*DLOAD): TRVEC
  2. FL−2

  3. General traction on the element reference surface.

  1. Load ID (*DLOAD): TRVECNU (S)
  2. FL−2

  3. Nonuniform general traction on the element reference surface with magnitude and direction supplied via user subroutine UTRACLOAD.

Foundations

Foundations are specified as described in Element Foundations.

*foundation
  1. Load ID (*FOUNDATION): F
  2. FL−3

  3. Elastic foundation.

Surface-Based Loading

Distributed Loads

Surface-based distributed loads are specified as described in Distributed Loads.

*dsload
  1. Load ID (*DSLOAD): HP
  2. FL−2

  3. Hydrostatic pressure on the element reference surface and linear in global Z. The pressure is positive in the direction opposite to the surface normal.

  1. Load ID (*DSLOAD): P
  2. FL−2

  3. Pressure on the element reference surface. The pressure is positive in the direction opposite to the surface normal.

  1. Load ID (*DSLOAD): PNU
  2. FL−2

  3. Nonuniform pressure on the element reference surface with magnitude supplied via user subroutine DLOAD. The pressure is positive in the direction opposite to the surface normal.

  1. Load ID (*DSLOAD): TRSHR
  2. FL−2

  3. Shear traction on the element reference surface.

  1. Load ID (*DSLOAD): TRSHRNU (S)
  2. FL−2

  3. Nonuniform shear traction on the element reference surface with magnitude and direction supplied via user subroutine UTRACLOAD.

  1. Load ID (*DSLOAD): TRVEC
  2. FL−2

  3. General traction on the element reference surface.

  1. Load ID (*DSLOAD): TRVECNU (S)
  2. FL−2

  3. Nonuniform general traction on the element reference surface with magnitude and direction supplied via user subroutine UTRACLOAD.

Incident Wave Loading

Surface-based incident wave loading is also available for these elements. See Acoustic and Shock Loads.

Element Output

Output is currently available only when the surface element is used to carry rebar layers. See Defining Reinforcement for details.

Node Ordering and Face Numbering on Elements



 

Numbering of Integration Points for Output