ABAQUS Verification Manual  


1.4.5 Cohesive element load verification

Products: ABAQUS/Standard  ABAQUS/Explicit  

Elements tested

COH3D8    COH3D6    COH2D4    COHAX4    COH3D8P    COH3D6P    COH2D4P    COHAX4P   

Features tested

The following features are tested in this verification problem:

  • Element-based distributed loading specified using the *DLOAD option.

  • Surface-based distributed loading specified using the *DSLOAD option.

  • Thermal loading specified using the *TEMPERATURE option.

Problem description

In this verification test all the nodes of each element are fixed, and the reaction forces generated at the nodes as a result of the load application are used to verify the element load calculations. In addition, the effect of thermal loading applied using the *TEMPERATURE option is verified by allowing each element to deform freely in the thickness direction with the change in temperature. The resulting thermal strains in the thickness direction are compared with the analytical results.

Model:

  • COH3D8, COH3D6, COH3D8P, and COH3D6P:


    Cubic dimensions7 × 7 × 7
    Thickness Geometry
    Thickness directionGlobal 2
    Response Continuum
    Centrifugal axis of rotation(1, 0, 0) through (3.5, –1000, 3.5)
    Coriolis axis of rotation(1, 0, 0) through origin
    Gravitational load vector(0, 1, 0)

  • COH2D4 and COH2D4P:


    Planar dimensions7 × 7
    Thickness Geometry
    Thickness directionGlobal 2
    Response Continuum
    Centrifugal axis of rotation(1, 0, 0) through (3.5, –1000, 0.0)
    Coriolis axis of rotation(0, 0, 1) through origin
    Gravitational load vector(0, 1, 0)

  • COHAX4 and COHAX4P:


    Planar dimensions10 × 10
    Thickness Geometry
    Thickness directionGlobal 1; Global 2
    Response Continuum
    Centrifugal axis of rotation(0, 1, 0) through origin
    Gravitational load vector(0, 1, 0)

Material:

Young's modulus3 × 106
Poisson's ratio0.3
Coefficient of thermal expansion0.0001
Density10.0

Initial conditions:

Initial temperatureALL, 0.0

Results and discussion

The calculated reactions are in agreement with the applied loads. In addition, the thermal stresses and strains in the thickness direction match the analytical results for the case of thermal loading.

Input files

ABAQUS/Standard input files

coh3d8_loads_std.inp

BX, BY, BZ, GRAV, CENT, CENTRIF, ROTA, P1, P2, P3, P4, P5, P6, P, *TEMPERATURE for COH3D8.

coh3d6_loads_std.inp

BX, BY, BZ, GRAV, CENT, CENTRIF, ROTA, P1, P2, P3, P4, P5, P6, P, *TEMPERATURE for COH3D6.

coh2d4_loads_std.inp

BX, BY, GRAV, CENT, CENTRIF, ROTA, P1, P2, P3, P4, P, *TEMPERATURE for COH2D4.

cohax4_loads_std.inp

BR, BZ, GRAV, CENT, CENTRIF, P1, P2, P3, P4, P, *TEMPERATURE for COHAX4.

coh3d8p_loads_std.inp

BX, BY, BZ, GRAV, CENT, CENTRIF, ROTA, P1, P2, P3, P4, P5, P6, P, *TEMPERATURE for COH3D8P.

coh3d6p_loads_std.inp

BX, BY, BZ, GRAV, CENT, CENTRIF, ROTA, P1, P2, P3, P4, P5, P6, P, *TEMPERATURE for COH3D6P.

coh2d4p_loads_std.inp

BX, BY, GRAV, CENT, CENTRIF, ROTA, P1, P2, P3, P4, P, *TEMPERATURE for COH2D4P.

cohax4p_loads_std.inp

BR, BZ, GRAV, CENT, CENTRIF, P1, P2, P3, P4, P, *TEMPERATURE for COHAX4P.

coh_corioload.inp

CORIO for COH3D8, COH3D6, and COH2D4.

cohp_corioload.inp

CORIO for COH3D8P, COH3D6P, and COH2D4P.

ABAQUS/Explicit input files

coh_bf_grav_xpl.inp

BX, BR, BY, BZ, GRAV for COH3D8, COH3D6, COH2D4, and COHAX4.

coh_p_vp_xpl.inp

P1, P2, P3, P, VP1, VP2, VP3, VP4, VP for COH3D8, COH3D6, COH2D4, and COHAX4.

coh_thermal_xpl.inp

*TEMPERATURE for COH3D8, COH3D6, COH2D4, and COHAX4.