Analisa Kekuatan Impak Helmet Sepeda Motor Metode Impak Jatuh Bebas

Abstract

The non-standard helmet testing is required for measure the helmet strength as effect of the load is given. In generally, traffic accident doesn�t involved by the velocity but also gravitational. Therefore, the research activity is done by researcher obtains the effect of free-fall impact loading on the non-standard helmet. The information which is obtained from this research will explain the effect of free-fall impact loading that is subjected on the non-standard helmet to user, industry, and also government. The objective of this research involves the testing apparatus construction of free-fall impact loading on the non-standard helmet, measuring the maximum impact loading, and the energy absorbing by helmet as effect of impact loading. The researcher collaborates with the Impact and Fracture Reaseach Center (IRFC) has bulit the testing apparatus which is equipped with good aquisition data system. The non-standar helmet is put on the adjustable testing rig. The impact time can be measured by eight inductive proximity sensors. The helmet will slide down and collides the anvil. The force will be measured with the load cell which is put down the anvil. There are four anvil forms which is adapted to the real condition, that is: flat plat, aligned plat, bullet, and a half-spherical anvil. The data will be transfered from the load cell into the DAQ system which has function to change the analog into digital signal. Finally, the data will be saved into PC as the force (N) and the impact time (ms). The free-fall impact testing equipment has shown the best performance on the force and impact time signal reading as long as the research activity. The maximum force on the flat anvil is 24.33 N; the aligned flat anvil is 37.88 N; the bullet anvil is 16.22 N; and a half-spherical anvil is 41.43 N at the elevation of 0.75 m. The minimum energy which causes the fracture on the helmet is 3.24 J at the elevation of 0.3 m.