good morning,
I am fairly new to the Hyper works world and I am struggling on the following topic:
A Bow (for Archery) ist modelled in its unstressed geometry (with 3D bricks).
The String which is attached to the tip of the bow is in real life shorter than the bow. Hence in reality you bend the bow , attach the string and let it spring back a bit.
In the model I attach the string directly to the tip but I try to model it as a beam section with execessive length.
In the first load step I wand to shorten (ie. contract ) it by applying a low temperature load. Once the bow has reached its brace hight which is with the string under tension but the arrow basically not pulled back I will then later apply a second load stept where the string is drawn back.
I got as far as modelling a beam and a string and run it static but that does not give the large defomation which occur.
I activated the NLstat command but that again ist only useful for small deflections. Since the stiffness matrix has to be reassembeld continuously,
I activated the NLGeom command. This gives useful results for the bending shape but I seem to have lost the possibility to apply the thermal load because there is no more Temp option any more like it was with static or Quasi static calculation.
Has anyone any idea how to progress from here?
An alternative to shorten the string by freezing would be maybe by removing elements? Don't know wether this is possible
This is only the beginning of a list of topics because there will be the contact issue between string an Bow later on.
regards
Rainer
