生物力学家、创伤专家详细研究人体在碰撞过程中经受的各种撞击力后指出:车祸不是单一的碰撞,而是一连串撞击的混合,首先是汽车与障碍物发生碰撞;第二次是人体与汽车内部相撞,创伤开始发生,肋骨与腿骨一般在此时断裂;第三次撞击是人体内脏与突然停下的人体外部构架相撞,此时大脑向前冲,撞到颅骨内壁,心脏也会撞击胸部内侧。致命伤一般发生在第三次撞击中。另外,不管汽车安全装备有 Biomechanics, trauma experts to study in detail the human body in the collision process after a variety of impact force pointed out: the car accident is not a single collision, but a series of impact of the mix, the first collision of vehicles and obstacles; the second is the human body and Car collision, trauma began to occur, the ribs and the leg bone is generally broken at this time; the third hit is the human internal organs and suddenly stopped the external body frame collide, when the brain rushed forward, hit the inner wall of the skull, heart Will also hit the inside of the chest. Fatal injuries generally occur in the third impact. In addition, regardless of the car safety equipment