Pouria Azarikhah

Dear Chris

Thank you for your kind response. Additionally, I would like to find required directional force in back plate of needle over the time. Only a constant velocity during the penetrating is considered in my model. I obtained force reaction selecting backplate face which does not show accurate trend . On the other hand, I extracted equivalent von mises stress of elements below needle which show acceptable trend. How should I find the required penetration force? Many Thanks.