12.3 Element Output

Element output values are written to the file <name>.elemout.txt. Following data items are given, each line-wise with white space delimiters:

• Instant of time with marker Time followed by

  • time-value

• Elements with marker El followed by

  • element number

  • element type

  • name of element set

  • name of material

  • material type

  • labels of element nodes belonging to element

  • supplementary for shells SH4 cross sectional integration order and number of reinforcement layers

• Data at integration points – sub-items in one line

  • integration point coordinates or in case of 1D elements and 2D elements / beams or in case of 3D elements, see Section 10.3

  • strains / generalized strains

    • truss elements (T1D2,T2D2,T2D2E,T2D3,T2D3E,T3D2,T2D2E,T3D3,T2D3E) with strain

    • Bernoulli beams (B23,B23I,B23E,B23EI) with generalized strains

    • Timoshenko beams (B21,B21E) with generalized strains

    • 2D continuum elements (CPE3,CPS3,CPE4,CPS4) with strains

      • is a placeholder for which is generally set to zero, also for plane stress

      • additional generalized strain output is provided with SDA-elements, see Section 10.3. Each discontinuity (‘crack’) has two sampling points, see Book 7.7
        

        - first two items indicate the coordinates of discontinuity center

        - 3rd item is a marker C* indicating a discontinuity data line

        - 4th and 5th item indicate discontinuity normal with - and -component

        - items 6 - 9 indicate discontinuity width: 6 and 7 for tangential and normal component of first sampling point, 8 and 9 for second sampling point

        
        

    • 3D-continuum elements (C3D*) with strains

      • additional generalized strain output is provided with SDA-elements, but this is still under construction

    • slab elements (SB3) with generalized strains

    • shell elements (SH4,SH3)

      • due to the continuum based 5-parameter shell model (see Book 10.2/3) a derivation of generalized strains is not appropriate

    • 1D spring element (S1D2) with elongation

    • 2D bond elements (B2D2E,B2D3E) with longitudinal relative displacement / slip and lateral relative displacement

    • 3D bond elements (B3D2E,B3D3E) with longitudinal relative displacement / slip and two orthogonal lateral relative displacements

  • stresses / generalized stresses

    • truss elements with stress

    • beams with internal forces for Bernoulli beams and for Timoshenko beams

    • 2D continuum elements (plates) with stresses

      • is a placeholder for which is generally set to zero, also for plane strain

      • additional generalized stress output is provided with SDA elements following the discontinuity width items: items 10 and 11 for tangential and normal traction component of first sampling point, items 12 and 13 for second sampling point

    • 3D continuum elements with stresses

      • additional output is provided with SDA elements in lines indicated by a C-marker. This is still under construction.

    • slab elements with moments and approximate shear forces

    • shell element stress items are related to the local integration point coordinate system, see Section 10.3 and Fig. 4
      three different sets are provided

      • with marker Z following the global mid-surface integration point coordinates
        

        – internal local forces related to (Fig. 4)

        a moment results from stresses in -direction, i.e. its rotation axis is with analogous rules for

        – coordinates of in global system

      • regarding material type *RCSHELL, see Section 10.4, following the global mid-surface integration point coordinates plus the isoparametric lateral coordinate
        

        – with marker C continuum stresses

        followed by two reserved values for internal state parameters whereby the first one is currently for damage parameters of material types *ISODAMAGE,*MICRODAMAGE

        – with marker R reinforcement stresses for each reinforcement layer as is defined with a *SHELL SECTION, see Section 10.7

        lateral shear stresses always for a reinforcement layer by definition

        it should be considered that the respective uniaxal reinforcement orientation may be different to the axes of the local coordinate system

        – for both markers C,R this is followed by corresponding principal stress data: three principal in ascending order each followed by its local eigenvector components

    • spring elements with spring force

    • 2D bond elements with bond stress and lateral penalty force

    • 3D bond elements (B3D2E,B3D3E) with longitudinal relative displacement / slip and two orthogonal lateral penalty forces

  • supplementary data specific for material models, see Section 10.4

    • *ELASTIC with option PHASE_FIELD

    • *MISES

    • *ISODAMAGE

    • *MICRODAMAGE

    • *RCBEAM

Example RC-beam B23E

Time   1.0000
El      5    B23E             PROP1          MAT1       RCBEAM      9     10     11
   2.0564   0.0000   7.2831e-04   1.1072e-02   1.4893e-05   1.8209e-01   2.3891e+00  -1.4861e+00
   2.2500   0.0000   7.3874e-04   1.1263e-02  -3.6207e-05   1.8501e-01   2.4282e+00  -1.5139e+00
   2.4436   0.0000   7.4917e-04   1.1455e-02   1.5056e-05   1.8790e-01   2.4673e+00  -1.5417e+00
...

Example plate CPS4

Time   1.0000
El     31    CPS4          EL1           MAT1         ELASTIC     34     43     44     35
   1.8943   3.3943  -4.3699e-05   4.8675e-06   0.0000e+00  -7.4924e-05  -1.4197e+00  -1.2867e-01   0.0000e+00  -9.9586e-01
   1.8943   3.1057  -4.1603e-05   4.8675e-06   0.0000e+00  -7.8599e-05  -1.3501e+00  -1.1474e-01   0.0000e+00  -1.0447e+00
   1.6057   3.3943  -4.3699e-05   1.1919e-06   0.0000e+00  -7.2827e-05  -1.4442e+00  -2.5081e-01   0.0000e+00  -9.6800e-01
   1.6057   3.1057  -4.1603e-05   1.1919e-06   0.0000e+00  -7.6503e-05  -1.3745e+00  -2.3688e-01   0.0000e+00  -1.0169e+00
...

Example slab SB3

Time   1.0000
El     11     SB3           PROP1                MAT2              NLSLAB     22     20      6
   2.5000   0.8333   5.0941e-03   1.1908e-03   4.3262e-03   3.2093e-02   7.5023e-03   1.3627e-02  -3.5518e-03   1.0683e-02
   2.3000   0.9000   4.9372e-03   1.0073e-03   4.3578e-03   3.1105e-02   6.3459e-03   1.3727e-02  -3.5518e-03   1.0683e-02
   2.5000   0.7000   5.1601e-03   1.3604e-03   4.3236e-03   3.2508e-02   8.5706e-03   1.3619e-02  -3.5518e-03   1.0683e-02
   2.7000   0.9000   5.2133e-03   1.1200e-03   4.1882e-03   3.2844e-02   7.0562e-03   1.3193e-02  -3.5518e-03   1.0683e-02
...

Example shell SH4:

Time   1.0000
El      7     SH4                     EL1               MAT2          MISES      7      8     19     18           5      0
    2.8302    0.4226   14.6990        Z  -4.7066e-02  -8.9233e-02   9.7324e-02   1.2878e-01  -2.2318e-02   3.8590e-02   6.6137e-02  -5.3893e-03     0.9820  0.0000 -0.1891  -0.0000  1.0000 -0.0000
    2.8302    1.5774   14.6990        Z   1.3405e-01  -5.3011e-02   1.1007e-01   1.4652e-01  -1.8771e-02   4.8432e-02   1.2113e-01  -5.3893e-03     0.9820  0.0000 -0.1891  -0.0000  1.0000 -0.0000
    4.1516    0.4226   14.3820        Z  -5.2629e-02  -5.6235e-02   1.7980e-01   1.3453e-01   6.5280e-03   4.6760e-02   4.5381e-02  -1.0953e-02     0.9608  0.0000 -0.2773  -0.0000  1.0000 -0.0000
    4.1516    1.5774   14.3820        Z   1.1629e-01  -2.2452e-02   1.9254e-01   1.5224e-01   1.0070e-02   5.6602e-02   9.7776e-02  -1.0953e-02     0.9608  0.0000 -0.2773  -0.0000  1.0000 -0.0000
...

Output is repeated for each time interval as defined by step sub-keyword *EL FILE, see Section 10.9.

Element output values are also written to the file <name>.elemout_.txt, same data with different formatting. Specifications remain to be appended.