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when simulating simple tension, one end is defined as displacement u1=0, u1 at the other end is prescribed.
I want to get the total force on the end with u1=0.
But, there are hundreds of nodes on this end, it is hard to output the force of each node and sum them up.
And the stress is not uniformly distributed.
Is there a easier way to output the total force?
I would suggest you create a surface on that end and calculate force on that surface. This way you wont have to deal with the forces on the nodes. You may even do it on the other end if you like...coz the forces should balance.
Could it be in more details? If I define a surface, where can I output the history of the surface force?
Do i need to define constraint/coupling to connect one node to surface? I am guessing that if I do so, then just output the node force force of this node, it will be equal to the total surface force, is it true? I am doubting about it. Or there is another way?
You can also use ABAQUS/CAE to sum the forces for you after the simulation is done. That is, after selecting history output simply select all the different reaction forces that you want to sum up, then click "save as", then click "Sum". That way you will get a x-y data set that contains the sum of all forces for the selected nodes.
This approach works for both ABAQUS v6.6 and v6.7.
You can ask ABAQUS to print the results of selected entities in the .dat file. Than, you can cut and paste into a spreadsheet (time consuming). Or you can go further and chose to write the desired results in .fil file. But, than you have to utilize some of the ABAQUS utility subroutines to extract the results. This takes a bit of time to set-up, but than it works very well for repetitive use. You need to know Fortran to use this technique.
You need to be careful though as to where you decide to sum up your forces.
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