Abstract

The purpose of this study is to examine the rotational mechanisms of a helmeted head and the effects of whole-body kinematic behavior of a cyclist and head-helmet interaction on head rotation and brain strain in an A-pillar impact in a car-to-cyclist collision. FE simulations where helmeted and unhelmeted cyclist models configured to collide with a small sedan car model were conducted. Although the number of impact simulations was limited, rapid head rotational motion and high brain strain were observed despite wearing a helmet model due to bottoming out of the helmet liner. In contrast, a low-friction helmet could reduce the change of head angular velocity and brain strain due to a significant reduction of a moment of force. In addition, the head rotation before impact generated relatively high brain strain, which indicated importance of whole-body kinematic behavior to discuss brain deformation in car-to-cyclist collisions.

摘要

本研究的目的是检查头盔头部的旋转机制以及骑自行车者的全身运动行为和头部头盔相互作用对汽车对 A 柱碰撞中头部旋转和大脑应变的影响。骑自行车的人碰撞。进行了有限元模拟，其中头盔和不戴头盔的自行车模型配置为与小型轿车模型发生碰撞。尽管冲击模拟的数量有限，但由于头盔衬里触底，尽管佩戴了头盔模型，但仍观察到快速的头部旋转运动和高脑劳损。相比之下，低摩擦头盔可以减少头部角速度的变化和大脑的应变，因为力矩显着降低。此外，撞击前的头部旋转会产生相对较高的大脑压力，