Numerical analysis of dynamic behaviors for living bodies collided with a moving object by FEM using nonlinear complex restoring force element

Abstract

In near future, opportunities of contacts between humans and robots will increase. Therefore, it can be said that knowing mechanical properties of human bodies for safety problems becomes important. In addition, machine design for the contact is desired. Under relatively large impact load, human palms have nonlinear restoring forces, and palm may exhibit a non-linear hysteresis in the dynamic characteristics. For the palms, as the compressive deformation increase, the spring of the palm shows hardening characteristics, and hysteresis become langer. We proposed and computed using nonlinear complex restoring force element to simulate experimental impact responses of alive human palms with bio mechanical reactions.