Bulk Data Entry Defines the properties of a simple beam (bar), which is used to create bar elements via the CBAR entry.


(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
  C1 C2 D1 D2 E1 E2 F1 F2  
  K1 K2 I12            


(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
PBAR 39 6 2.9 8.4 5.97 1.1      
      2.0 4.0          


Field Contents SI Unit Example
PID Unique simple beam property identification.
Specifies an identification number for this property.
Specifies a user-defined string label for this property. 2

No default (Integer > 0 or <String>)

MID Material identification. 1 2
Specifies a material identification number.
Specifies a user-defined material identification string.

No default (Integer > 0 or <String>)

A Area of bar cross-section.

No default (Real ≥ 0.0)

I1 Area moment inertia in plane 1 about the neutral axis.

No default (Real ≥ 0.0)

I2 Area moment inertia in plane 2 about the neutral axis.

No default (Real ≥ 0.0)

I12 Area product of inertia.

Default = 0.0 (Real) (I1 > 0,. I2 > 0., I1 * I2 > I122)

J Torsional constant.

Default = 0.0 (Real > 0.0)

NSM Nonstructural mass per unit length.

Default = 0.0 (Real)

K1, K2 Area factor for shear.

Default = 0.0 (Real)

Ci, Di, Ei, Fi Stress recovery coefficients.

Default = 0.0 (Real)



  1. For structural problems, MID may reference only a MAT1 material entry. For heat transfer problems, MID may reference only a MAT4 material entry.
  2. String based labels allow for easier visual identification of properties, including when being referenced by other cards. (For example, the PID field of elements). For more details, refer to String Label Based Input File in the Bulk Data Input File.
  3. The transverse shear stiffness in planes 1 and 2 are (K1)AG and (K2)AG, respectively. The default values for K1 and K2 are infinite; in other words, the transverse shear flexibilities are set equal to zero. K1 and K2 are ignored if I12 ≠ 0. If a value of 0.0 is used for K1 and K2, the transverse shear flexibilities are set to 0.0 (K1 and K2 are interpreted as infinite).
  4. The stress recovery coefficients C1 and C2, and so on, are the y and z coordinates in the BAR element coordinate system of a point at which stresses are computed. Stresses are computed at both ends of the BAR.

    Figure 1. Coordinate System for Bar Element (PBAR)
  5. The moments of inertia are defined as:(1)
    I 1 = I xx = y 2 dA
    I 2 = I yy = z 2 dA
  6. This card is represented as a property in HyperMesh.