These two videos each show a frontal crash visualizing the force flux using force flux tubes.
Evaluating the results of siimulations the calculating engineer is among other things interested in knowing which components convert how much force to deformation energy or transmit it to adjacend components.
The devolution of the force flux for example in the main girders at a frontal crash can be simulated intuitively with crashViewer using a force fluxe tube. To do this at first the user specifies the mid-line of the force flux tube to be generated by the interactive selection of node points. Now the contibuting finite elements are determined in equal distances orthogonally along this mid-line. Here too the use of a bounding volume tree (see efficient distance calculation) garantees an efficient calculation. The section forces are computed and summed up for the contributing elements. The accumulated section force value is visualized by the radius and also by the color of the tube. The Calculation of a force flux tube is very expensive and may take several minutes.
These two videos each show a frontal crash visualizing the force flux using force flux tubes.
The definition of a mid-line of a force flux tube kann be saved. With the aid of a batch programm accessing the same modules as crashViewer one or more such definitions can be read in together with a PAM-crash output file. The calculated section forces can so be saved and later on be read in and be visualized by crashViewer without making the user wait for the calculation.