CEDREM is a no limit engineering team expert in high speed phenomena as explosions, shocks, ballistics and impacts. Our main activity has always been computer based modeling. This has led us to develop the software ourselves to push the limits of our ability and enhance the performance of our customer's products. With numerical simulation, we always try to get inside structures, including the human body. The aim is always to achieve a better understanding of the phenomena. Thinking outisde the box and looking at the problem from a different angle often means we create new materials and design specific to the customer's requirements. Highly involved in composites, we have created our own tools, gathered in the KTex Family, to represent this complex material at the scale of the yarns and study the impact of the manufacturing processes on its performance. We have also built our own human body model featuring all the bones and organs. Simulating the internal fluids being its specificity, pressure waves can propagate from one organ to the other without contact.