Table of Contents
name.i1
Program
RMD2 RMD3 XRM2 XRM3
Format
; main parameters IP NELEM NNOD ITED 0 NGD 0 KPER NPSN 0 KSS RP CRIT SCALE THDEF XL XU YL YU ZL ZU ALPHA ␣␣$A$ $I_k$ $W_k$ $I_\eta$ $W_\eta$ $I_\zeta$ $W_\zeta$ $p_x$ $p_y$ $p_z$ ; optional default values of line elements’ geometrical characteristics (see note below)
; description of nodes XY C IN$_1$ $x_{\mathtt{IN}_1}$ $y_{\mathtt{IN}_1}$ $z_{\mathtt{IN}_1}$ $\dots$ C IN$_n$ $x_{\mathtt{IN}_n}$ $y_{\mathtt{IN}_n}$ $z_{\mathtt{IN}_n}$ ; row-wise XY N IN$_1$ $\dots$ IN$_n$ X $x_{\mathtt{IN}_1}$ $\dots$ $x_{\mathtt{IN}_n}$ Y $y_{\mathtt{IN}_1}$ $\dots$ $y_{\mathtt{IN}_n}$ Z $z_{\mathtt{IN}_1}$ $\dots$ $z_{\mathtt{IN}_n}$ ; column-wise
; description of elements EL T ITE E IE N INE$_1$ $\dots$ INE$_\mathtt{NNE}$ H $h_1$ $\dots$ $h_\mathtt{NNE}$ G NG ␣␣S IH R $I_\eta$ $I_\zeta$ $A$ $\alpha_v$ $h_T$ $h_v$ ; optional description of the semi-loof element’s edge reinforcement(s) ␣␣A $A$ $I_k$ $W_k$ $I_\eta$ $W_\eta$ $I_\zeta$ $W_\zeta$ C $p_x$ $p_y$ $p_z$ ; optional values of line element’s geometrical characteristics (see note below)
; description of connector elements CN T INDF E IE IE$_1$ ID$_1$ IE$_2$ ID$_2$
; end of input data EN EN
If the EL
batch describing a line element is missing groups A
or C
, the default values from the RP
line are used.
Annotations
$\mathtt{NELEM}$ | The number of elements, including any connector elements. | |
---|---|---|
$\mathtt{NNOD}$ | The number of nodes. | |
$\mathtt{ITED}$ | The default value of the element type identification number. It is used when the EL batch is missing the T group. The default value is $\mathtt{ITED}=6$ (when $\mathtt{NDIM}=2$) or $\mathtt{ITED}=56$ (when $\mathtt{NDIM}=3$). |
|
$\mathtt{NGD}$ | The default value of the element numerical integration order, $2\le\mathtt{NGD}\le4.$ It is used when the EL batch is missing the G group. The default value is $\mathtt{NGD}=3.$ |
|
$\mathtt{KPER}$ | The key of periodicity. | |
$=0$ | non-periodic mesh | |
$=1$ | periodic mesh | |
$\mathtt{NPSN}$ | The number of nodes on the periodicity surface (when $\mathtt{KPER}=1$), or the number of nodes in the symmetry plane (when $\mathtt{KPER}=0$). | |
$\mathtt{KSS}$ | The key of the 2-D stress-strain matrix. | |
$=-1$ | plane stress ($\sigma_{xz}=\sigma_{yz}=\sigma_{zz}=0$) | |
$=0$ | plane strain ($\varepsilon_z=0$) | |
$=1$ | nonzero plane strain ($\varepsilon_z=\varepsilon_{z0}=\text{konst.}$) | |
$=2$ | axisymmetric (the axis of rotation is the $y$ axis) | |
$\mathtt{CRIT}$ | The criterion for checking Jacobians, i.e., the degree of distortion of elements. The adequate value is $1\le\mathtt{CRIT}\le2.5,$ for severely (but still allowably) distorted elements it may be up to $4.$ | |
$\mathtt{SCALE}$ | The scale of node coordinates and element thicknesses in XY a EL batches. For example, the value $\mathtt{SCALE}=0{,}001$ means that all coordinates and thicknesses are entered in milimeters. |
|
$\mathtt{THDEF}$ | The default thickness of planar elements and shell elements. It is used when the EL batch is missing the H group. The default value is $\mathtt{THDEF}=1.$ |
|
$\mathtt{XL},\mathtt{YL},\mathtt{ZL},$ $\mathtt{XU},\mathtt{YU},\mathtt{ZU}$ | The coordinates $(\mathtt{XL},\mathtt{XU})\times(\mathtt{YL},\mathtt{YU})\times(\mathtt{ZL},\mathtt{ZU})$ of the bounding box, not touching the body. It is used for checking input data. The default values are $\mathtt{XL}=\mathtt{YL}=\mathtt{ZL}=10^{-10},$ $\mathtt{XU}=\mathtt{YU}=\mathtt{ZU}=10^{10}.$ | |
$\mathtt{ALPHA}$ | The angle between the periodicity surfaces $[^\circ]$ (when $\mathtt{KPER}=1$). | |
$\mathtt{IN}_i$ | The index number of the $i$-th node, $1\le\mathtt{IN}_i\le\mathtt{NNOD}.$ | |
$x_{\mathtt{IN}_i},y_{\mathtt{IN}_i},z_{\mathtt{IN}_i}$ | The coordinates of the $i$-th node in the global Cartesian coordinate system. In 2-D meshes, the $z$ coordinates are always omitted. | |
$\mathtt{ITE}$ | The identification number of the element type. When the T group is missing, the value of $\mathtt{ITED}$ is used. |
|
$=4$ | triangle | |
$=5$ | axisymmetric triangle | |
$=6$ | quadrilateral | |
$=7$ | axisymmetric quadrilateral | |
$=51$ | truss | |
$=53$ | beam | |
$=54$ | tetrahedron | |
$=55$ | pentahedron | |
$=56$ | hexahedron | |
$=57$ | pyramid | |
$=61$ | semi-loof | |
$\mathtt{IE}$ | The index number of the element. | |
$\mathtt{NNE}$ | The number of nodes in the element, including any omitted midside nodes. | |
$\mathtt{INE}_j$ | The index numbers of the element’s nodes in predefined order, $1\le j\le\mathtt{NNE}.$ Midside nodes may be omitted by entering 0 at the appropriate position. |
|
$h_j$ | The element’s nodal thicknesses (only for planar elements and shell elements), $1\le j\le\mathtt{NNE}.$ If there is only a single value, it holds for all nodes of the element. When the H group is missing, the value of $\mathtt{THDEF}$ is used for all nodes of the element. |
|
$\mathtt{NG}$ | The order of numerical integration on the element, $2\le\mathtt{NG}\le4.$ When the G group is missing, the value of $\mathtt{NGD}$ is used. |
|
$\mathtt{IH}$ | The local edge number of the semi-loof element. | |
$\mathtt{INDF}$ | The identification number of the connection type. | |
$=-1$ | sandwich | |
$=-2$ | edge connection | |
$=-3$ | face connection | |
$=-4$ | fixed connection | |
$=-5$ | hinged connection | |
$=-6$ | transient resistance | |
$\mathtt{IE}_1,\mathtt{IE}_2$ | The index numbers of connected elements. | |
$\mathtt{ID}_1,\mathtt{ID}_2$ | The local numbers of entities at which the elements are connected. |