Quality Check

RecurDyn/Mesher supports to check the quality of elements.

•     This function expresses the maximum value and the minimum value of all meshed elements to the defined item and the element which is out of the defined value in the Mesh mode. If you select several items, you cannot see the maximum value and the minimum value. But you can express all elements which are out of the condition.

Figure 1  Quality Check icon of the Mesher group in the Mesher tab

Figure 2  Quality Check dialog box

•     Element Check

•    Aspect Ratio: Checks the ratio of maximum element edge length to the minimum length. If you set as 3, you can see elements of greater than 3. The aspect ratio is always larger than 1 and it has the good quality to the nearer 1.

Figure 3  Definition of Aspect Ratio

•    Angle: Checks the interior angle of elements. If you set as “> 100” “< 45”, you can see elements of less than 45° or greater than 100°.

Figure 4  Definition of Interior Angle

•    Skewness: Checks the index to the torsion (asymmetry) of element. The skewness is larger than 0 and it has the smaller value than 90. It has the good quality to the nearer 0.

Figure 5  Definition of Skewness

•    Warping: Checks the angle between the normal (N1 and N2) of two adjacent triangles, as shown following figure. If you set as 18, you can see elements of greater than 18. This function supports only to the Shell4 mesh type. This value is 0 to 180 and has the good quality to the nearer 0.

Figure 6  Definition of Warping

•    Tapering: Checks the deviation of an area to the average of four areas. If you set as 0.5, you can see greater elements than 0.5. This function only supports to the Shell4 mesh type. This value is always larger than 0 and it has the good quality to the nearer 0.

Figure 7  Definition of Tapering

•    Max Value: Shows the maximum value of selected a function. So, you can get the standard value to evaluate the quality of elements easily.

•    Min Value: Shows the minimum value of selected a function. So, you can get the standard value to evaluate the quality of elements easily.

•     Line Check

Figure 8  Preview for Line Check

•    Free Line: The lines that belong to only one element are checked.

•    T-Connection Line: The lines that belong to more than three elements are checked.

•    Intersection Line: If lines go through the patches of elements, the lines are checked.

•     Preview: If this option is checked, the geometric entity which is applied to the setting values shown in the screen.

•     Show Tooltip: Elements or lines are checked and show in the view. This shows the tooltips of them as well.

•     Update: Updates the setting values.

•     Select: Select the low-quality elements that are below criteria. You can do the Node Merge operation with those selected elements. Or you can delete the unwanted elements.