Study on the Operation of Liquid-Filled Anti-G Suit Based on Finite Element Method

High-performance military pilot’s blood shifts from upper extremities to the legs and feet and causes impaired vision and loss of consciousness. To avoid the effect of acceleration forces, a kind of liquid-filled protective garment has been proposed instead of pneumatic anti-G suits. In this paper, the finite element model of upper extremities and lower extremities of the body consisting of liquid-filled anti-G suit and human aircraft can generate extremely high gravitational acceleration which can shift pi tissue was developed to study the influence of liquid-filled anti-G suit on the body of pilot under different overload acceleration. The results show that: (1) the surface pressure gradually increases along with the increase of overload acceleration and liquid-filled level; (2) the maximum deformation of human mesh tissue increases along with the increase of overload acceleration and liquid-filled level; (3) the maximum stress and deformation of the clothes are similar with the pattern of human mesh tissue.