PBAR

PBAR – Simple Beam Property

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

Field	Contents
PID	Unique simple beam property identification number. No default (Integer > 0)
MID	Material identification number. No default (Integer > 0)
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) ( $image\i1i2.gif$ )
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)

For structural problems, PBAR entries may reference only MAT1 material entries.
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 ¹ 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).
The stress recovery coefficients C1 and C2, etc., 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.

$image\bmp00024.gif$

Bar element coordinate system.

$image\integer.gif$

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