Cylindrical Membrane Element Library

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

This page discusses:

Element Types

MCL6

6-node cylindrical membrane

MCL9

9-node cylindrical membrane

Active Degrees of Freedom

1, 2, 3

Additional Solution Variables

None.

Nodal Coordinates Required

X, Y, Z

Element Property Definition

Element-Based Loading

Distributed Loads

Distributed loads are specified as described in Distributed Loads.

*dload
  1. Load ID (*DLOAD): BX
  2. FL−3
  3. Body force in the global X-direction.

  1. Load ID (*DLOAD): BY
  2. FL−3
  3. Body force in the global Y-direction.

  1. Load ID (*DLOAD): BZ
  2. FL−3
  3. Body force in the global Z-direction.

  1. Load ID (*DLOAD): BXNU
  2. FL−3
  3. Nonuniform body force in the global X-direction with magnitude supplied via user subroutine DLOAD.

  1. Load ID (*DLOAD): BYNU
  2. FL−3
  3. Nonuniform body force in the global Y-direction with magnitude supplied via user subroutine DLOAD.

  1. Load ID (*DLOAD): BZNU
  2. FL−3
  3. Nonuniform body force in the global Z-direction with magnitude supplied via user subroutine DLOAD.

  1. Load ID (*DLOAD): CENT
  2. FL−4(ML−3 T−2)
  3. Centrifugal load (magnitude is input as ρω2, where ρ is the mass density per unit volume, ω is the angular velocity).

  1. Load ID (*DLOAD): CENTRIF
  2. T−2
  3. Centrifugal load (magnitude is input as ω2, where ω is the angular velocity).

  1. Load ID (*DLOAD): CORIO
  2. FL−4T (ML−3 T−1)
  3. Coriolis force (magnitude is input as ρω, where ρ is the mass density per unit volume, ω is the angular velocity).

  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. The pressure is positive in the direction of the positive element normal.

  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): ROTDYNF (S)
  2. T−1
  3. Rotordynamic load (magnitude is input as ω, where ω is the angular velocity).

  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.

Element Output

If a local orientation (Orientations) is not used with the element, the stress/strain components are expressed in the default directions on the surface defined by the convention given in Conventions. If a local orientation is used with the element, the stress/strain components are in the surface directions defined by the orientation. In large-displacement problems the local directions defined in the reference configuration are rotated into the current configuration by the average material rotation. See State storage for details.

Stress, Strain, and Other Tensor Components

Stress and other tensors (including strain tensors) are available for elements with displacement degrees of freedom. All tensors have the same components. For example, the stress components are as follows:

S11

Local 11 direct stress.

S22

Local 22 direct stress.

S12

Local 12 shear stress.

Section Thickness

STH

Current thickness.

Node Ordering and Face Numbering on Elements



 

Numbering of Integration Points for Output