PBAR

Bulk Data Entry

PBAR – Simple Beam Property

Description

The PBAR bulk data entry defines the properties of a simple beam (bar), which is used to create bar elements via the CBAR entry.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
PBAR	PID	MID	A	I1	I2	J	NSM
	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
PID	Unique simple beam property identification number. No default (Integer > 0)
MID	Material identification number. See comment 1. 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) ()
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)

Comments

1.	For structural problems, MID may reference only a MAT1 material entry. For heat transfer problems, MID may reference only a MAT4 material entry.

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).

3.	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.

BMP00024

Fig 1: Coordinate System for Bar Element (PBAR).

4.	The moments of inertia are defined as follows:

integer

5.	This card is represented as a property in HyperMesh.