为减轻汽车碰撞事故中安全带可能造成的乘员伤害，提出了具有负泊松比(NPR)特性的安全带织带的概念。建立了包含人体胸部简化模型的织带性能仿真有限元模型。对比了NPR织带与传统织带的乘员保护效能；研究了泊松比、摩擦因数对NPR织带保护效能的影响；Madymo假人碰撞仿真，验证了NPR织带的有效性。结果表明：与传统织带相比，NPR织带能有效减小乘员胸部压缩变形量；泊松比越小，保护效能越佳；而胸部与织带间的摩擦不利于NPR织带保护效能的发挥。%A concept of seat belt webbing with negative Poisson's ratio (NPR) characteristic was proposed for mitigating the harm to occupants by the seat belt in car-crash accidents. A ifnite element (FE) model with a simpliifed human chest model was established and used for webbing performance simulation. The occupant protection performances of NPR webbing were compared with that of the traditional webbing. The effects of Poisson’s ratio and friction coefifcient on the NPR webbing’s performance were investigated. The effectiveness of the NPR webbing was veriifed by MADYMO dummy crash simulation. The results indicate that compared with the traditional seat belt webbing, the NPR webbing can effectively reduce the occupant chest delfection;the smal er the Poisson’s ratio, the better the protection performance;friction between the occupant chest and the NPR webbing is not conducive to the effectiveness of the NPR webbing.
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