假人脚部力学特性的试验研究
Experimental Study on Mechanical Characteristics of Dummy Foot

汽车碰撞试验假人的脚部压缩试验是检验假人生物拟合性是否完好必不可少的试验之一，根据假人脚部标定试验法规要求，设计、制造了假人脚部压缩试验机，试制了4种弹性泡沫材料的不同厚度的脚垫样板，并进行了压缩试验，分析了样板厚度、密度以及硬度对试验结果的影响，得到了载荷-压缩量曲线随样板厚度、硬度变化的一般规律。研究结果表明：当脚垫材料的厚度为6 mm、7 mm以及C型邵氏硬度的大致范围为10~20时，假人的生物拟合性较好。
In order to ensure the biofidelity of a vehicle crash test dummy, it is essential to conduct a foot compression test. A compression testing machine was designed and manufactured based on the calibration test regulations for dummy foot. Four different elastic foam materials of heel pads with several thicknesses were made. Foot compression tests for these samples were performed. The influence of thickness, density and hardness of the sample on the mechanical responses was analyzed based on the test results. A general rule of stiffness curve changing with the thickness and hardness of the samples was obtained. The research results shows that a 6 mm or 7 mm heel pad foam sample with 10~20 Shore hardness (type C) is appropriate to ensure its biofidelity