Virtual Reality technologies are increasingly used in numerous domains. In industrial applicationsfor instance, virtual prototyping enables engineers to interactively test if one part can be assembledinto another. In such simulations, the contact between virtual objects is an essential notion as ittightly governs the movement of objects, constraining their trajectory with respect to...

This work describes methodology for evaluating laboratory models of head impact biomechanics. Using this methodology, we investigated: how closely does twin-wire drop testing model head rotation in American football impacts? Head rotation is believed to cause mild traumatic brain injury (mTBI) but helmet safety standards only model head translations believed to cause severe TBI. It is unknown w...

Abstract In order to study the effect of different launch tube diameters gas-driven two-stage light gas guns on flow field during process, a model piston movement in pump projectile was established using Fluent. Using dynamic mesh technology and 6DOF model, numerical simulation process gun carried out, effects tubes velocity bore were obtained. The results show that when mass difference between...