CQPSTN

Bulk Data Entry Defines a plane strain quadrilateral element in x-z or x-y plane.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
CQPSTN EID PID G1 G2 G3 G4 G5 G6  
  G7 G8 THETA            

Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
CQPSTN 111 2 31 74 75 32 51 52  
  53 85 15.0            

Definitions

Field Contents SI Unit Example
EID Unique element identification number.

No default (Integer > 0)

  
PID A PPLANE entry identification number.

Default = EID (Integer > 0)

  
G1, G2, G3, G4 Identification numbers of connected corner grid points.

These fields are mandatory.

No default (Integers > 0, all unique)

  
G5, G6, G7, G8 Identification numbers of connected edge grid points.

Default = blank (Integers > 0 or blank)

  
THETA Material orientation angle in degrees.

Default = 0.0 (Real)

  

Comments

  1. Element identification numbers must be unique with respect to all other element identification numbers.
  2. The Grid ordering of G1 through G8 are defined as:


    Figure 1. CQPSTN Definition
  3. The continuation line is optional.
  4. If the PPLANE entry referenced in field 3 references a MAT3 entry, material properties and stresses are always given in the xm-zm coordinate system shown in Figure 1.
  5. Plane strain analysis defined in x-y plane is supported, i.e. the axis labels of “z” above can be replaced by “y”.
  6. A concentrated load (e.g. a load specified by a FORCE entry) at a grid Gi of this element is defined to distribute along the thickness, T, of the element. For example, in order to apply a load of 200 N/m to a node Gi with the element thickness being 5.0m, the amount to be specified on the load entry should be:(1)
    ( 200N/m )*5.0m=1000N MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca aIYaGaaGimaiaaicdacaWGobGaai4laiaad2gaaiaawIcacaGLPaaa caGGQaGaaGynaiaac6cacaaIWaGaamyBaiabg2da9iaaigdacaaIWa GaaGimaiaaicdacaWGobaaaa@44B4@

    The default thickness of 1.0 is used, if T is not specified on the PPLANE entry.

  7. Plane strain elements are supported in linear analysis, small and large displacement nonlinear static analyses. They are currently not supported for large displacement inertia relief analysis.