1.3.8 Love-Kirchhoff beams and shells

Product: ABAQUS/Standard  

Elements tested

B23    B23H    B33    B33H    STRI3    STRI65   

Problem description

A three-dimensional problem is shown here. It may be particularized for two-dimensional beam elements.

Material:

Linear elastic, Young's modulus = 30 × 106, Poisson's ratio = 0.3.

Boundary conditions:

at end A, at end B.

Loading:

25.0 at end A, 100.0 at end B. Only , , and are applied for shell models.

Gauss integration is used for the shell cross-section for element STRI3.

Reference solution

Displacements in beam elements

= 1.667 × 10–5, = –1.333 × 10–3, = 0.01467 at node A,

= 4.92 × 10–3, = 5.2 × 10–3, = 1.2 × 10–3 at node.

Stress resultants in beam elements

–25.0, 25(1 – x), 100 + 25(5 – ), 100.0.

Displacements in shell elements

1.667 × 10–5, 0.01467 at node A, 5.2 × 10–3 at node B.

Results and discussion

Beam elements yield exact solutions. 3-node shell elements yield exact solutions for and but yield a value of 0.01412 for . 6-node shell elements yield exact solutions for and but yield a value of 0.01464 for .

Input files

eb2arxs4.inp

B23 elements.

eb2jrxs4.inp

B23H elements.

eb3arxs4.inp

B33 elements.

eb3jrxs4.inp

B33H elements.

es63sxs4.inp

STRI3 elements.

es56sxs4.inp

STRI65 elements.