CQPSTS
Bulk Data Entry Plane stress quadrilateral element connection. Defines a plane stress quadrilateral element in the xz or xy plane.
Format
(1)  (2)  (3)  (4)  (5)  (6)  (7)  (8)  (9)  (10) 

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

CQPSTS  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. No default (Integers > 0 or blank) 

Theta  Material orientation angle in
degrees. Default = 0.0 (Real) 
Comments
 Element identification numbers must be unique with respect to all other element identification numbers.
 The grid ordering of G1 through G8 is defined as:
 The continuation is optional.
 The definition of the elemental coordinate system and material orientation angle theta is the same as defined for CQUAD4 and CQUAD8, depending on the number of nodes in the CQPSTS elements.
 Plane stress analysis defined in the xy plane is supported, that is, the axis labels of “z” can be replaced by “y”. The outofplane normal direction defined by the corner node sequence with the right hand rule should point to the z direction if the element is in the xy plane, or the y direction if in the xz plane.
 A concentrated load (for example,
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, to apply a load of 200 N/m to a node Gi with the element thickness
being 0.05 m, the amount to be specified on the load entry should be
(200N/m) * 0.05m = 10N.
The default thickness of 1.0 is used if T is not specified on the PPLANE entry.
 Plane stress elements are
supported in:
 Linear static analysis
 Nonlinear Static analysis (Small and large displacement)
 Linear Transient Analysis
 Frequency Response Analysis
 Real and Complex Eigenvalue Analysis
These elements are currently not supported in: Inertia Relief analysis
 Buckling analysis
 Heat transfer analysis
 Optimization