Hello everyone,

I was working in R&D at an engineering firm and was mostly working with 
MSC-ADAMS. I picked up a hobby/research project which involves rigid/flex 
modelling and simulating a compound bow. Since MSC-ADAMS is not viable 
financially or otherwise, I looked up a few solutions online and I landed 
here on this forum. (the other package I found was FreeDyn, which was 
closer to ADAMS, but I couldn't find proper documentation, especially for 
modelling contact/collision). 

I aim to find the output of the system consisting of a compound bow and an 
arrow. By output, I mean, the ejecting velocity, range, stress (if we take 
up a flex part) etc. 

I would try to break my questions into pointers, so it's easy to reply :

   1. Is it possible to model a compound bow and arrow using this project? 
   2. If yes, how steep is the learning curve for someone with basic python 
   experience? (I do have experience with C++ but it has been a while, python 
   is my go-to language for day-to-day programming.)
   3. Can contacts be modelled fairly easily? (In ADAMS it was particularly 
   very easy)
   4. If I have a CAD ready, will it be useful or do I need to manually 
   define all the bodies?
   5. As my project might involve deformation in some elements, can flex 
   body be modelled with pychrono? (I saw it being listed in Brief 
   Introduction)
   1. Do we need to find free/open-source FE software or it could be 
      handled by the library?
      2. How difficult would it be?
      

I would be really thankful if anyone could answer all or even a few of the 
queries. This module seems to be promising for learning anyway (project or 
not). Hoping to start learning.

Thanks again.
DM

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