ABAQUS Verification Manual  


1.5.3 Patch test for cylindrical elements

Products: ABAQUS/Standard  

Elements tested

CCL12    CCL24    CCL24R   

Problem description

Material:

Linear elastic, Young's modulus = 1.0 × 106, Poisson's ratio = 0.25.

Loading:

Displacement boundary conditions applied to all exterior nodes: 10–3r, 10–3.

Nonuniform body force: To maintain a constant shear stress 400 and preserve equilibrium, an equilibrating body force, BZNU, is defined in user subroutine DLOAD as BZNU –400, where r is the radius of the integration point.

Reference solution

The analytical results for each step are presented below.

Step : PERTURBATION

  • 2000.

  • 400.

  • 10–3.

  • 10–3.

Results and discussion

All elements yield exact solutions.

Input file

ABAQUS/Standard input files

ecccgfp1.inp

CCL12 elements.

ecccgfp1.f

User subroutine DLOAD used in ecccgfp1.inp.

eccrgfp1.inp

CCL24 elements.

eccrgfp1.f

User subroutine DLOAD used in eccrgfp1.inp.

eccrgrp1.inp

CCL24R elements.

eccrgrp1.f

User subroutine DLOAD used in eccrgrp1.inp.