PRESENT GRAPH ELEMENT Elements

              

This command will produce a graph showing the variation of results at a specified element (see note 2) across the range of loadcases specified in the RESULTS LOADCASE command. If more than one element is specified then graphs for each (up to a limit of 1000) will be superimposed. The required elements can be an OLD list (the last element or elements to be graphed), they can be specified as part of the command, or they can be taken from a specified set (see note 1).

Notes:

1.

Specifying a set
If a set is specified that is a node set, then the elements used in the graph will be all those elements that have a node in the set.

2.

Element results
For each specified element, by default one representative results value is taken. This can be set to be either the (absolute) maximum, (absolute) minimum, mean value, or nth value of the results at each of the element's nodes or Gauss points using the command RESULTS RANGE EL-RESULT.

However, if a list of elements is entered as part of the PRESENT GRAPH ELEMENT command, then after each element number the option is given to specify what value for that element is to be used. The choice available is NODE n, GAUSS n, MAX [ABSOLUTE], MIN [ABSOLUTE], or MEAN, making it possible to graph variation at specific element nodes (for elementwise nodal results) or specific Gauss points (for elementwise Gaussian results) as well as extreme or mean values for an element. If NODE is specified, then the node number entered is the model node number and the user should ensure that the node is actually part of the associated element. If GAUSS is specified, then the Gauss point number is local to the associated element and refers to the order in which the Gauss point results were entered into FEMVIEW.

3.

Nodal results
This command is only available if the currently selected results attribute contains element results. If nodal results have been selected then a warning message will be produced and the user should use the command PRESENT GRAPH NODE.

4.

Graphs of more than one attribute
The results graphed will be the currently selected results superimposed with any results previously added to the RESULTS STACK. In this way multiple attribute graphs are possible, provided of course that all of the attributes to be graphed are element results.

5.

Input of results data to FEMVIEW
For a time, frequency, or load step related loadcase, the results should be submitted to FEMVIEW in ascending order of time, frequency, or load step within the loadcase.

6.

Graphs across static loadcases
If a range of static loadcases has been specified with the RESULTS LOADCASE command, then the graph will be plotted with a constant increment along the x-axis.

7.

Graphs of results for multiple surfaces
Where there are results values for more than one surface, the required surface or surfaces may be specified with the RESULTS RANGE SURFACE command. If no surface number is specified then all of the surfaces encountered will be used.

Examples:

1.

PRESENT GRAPH ELEMENT OLD

A graph of the currently selected results and those previously stored in the results stack at the previously selected element(s) against loadcases is drawn.

2.

PRESENT GRAPH ELEMENT 1 TO 10

A graph of results at the specified elements against loadcases is drawn.

3.

PRESENT GRAPH ELEMENT 1 NODE 2 7 NODE 15 22 NODE 47

A graph of (elementwise nodal) results at the nodes 2, 15 and 47 in elements 1, 7 and 22 respectively is plotted against loadcases.

4.

PRESENT GRAPH ELEMENT 1 GAUSS 2 7 GAUSS 3 22 GAUSS 1

A graph of (elementwise Gaussian) results at the 2nd, 3rd and 1st Gauss points in elements 1, 7 and 22 respectively is plotted against loadcases.

5.

PRESENT GRAPH ELEMENT 36 MAX 36 MIN

A graph of the maximum and minimum results values for element 36 against loadcases is drawn.

6.

PRESENT GRAPH ELEMENT bracket

A graph of results at the elements in the set `bracket' against loadcases is drawn.

See also the following commands

'PRESENT GRAPH NODE'
'PRESENT OPTIONS GRAPH'
'RESULTS LOADCASE'
'RESULTS RANGE'
'RESULTS STACK'