TY - JOUR AU - Lumdoun, Watcharayut AU - Sakkampang, Kunanon AU - Sriamnuai, Jeerayut PY - 2022/07/18 Y2 - 2024/03/29 TI - Finite element analysis of the effect of angles on impact helmet JF - Engineering and Applied Science Research JA - Eng Appl Sci Res VL - 49 IS - 5 SE - ORIGINAL RESEARCH DO - UR - https://ph01.tci-thaijo.org/index.php/easr/article/view/247830 SP - 643-656 AB - <p>This research examined the helmets of motorcyclists with an impact tester using a solid round hammer, 45<sup>o</sup> pointed hammerhead, serrated hammerhead, and a curved hammerhead. The weight of the hammer, 15 kg, was dropped at height 1 m (E<sub>k</sub> = 146 J), 2 m (E<sub>k</sub> = 294 J), 3 m (E<sub>k</sub> = 441 J) and 4 m (E<sub>k</sub> = 588 J), respectively, to analyze the effect of the impact load. The experimental results were comparatively analyzed using Finite Element Analysis (FEA) at angles of 55°, 70C, 80°, 90°, 100° and 110°. According to the results of this study, it was found that the curved hammerhead showed the lowest load compared to the highest loaded hammerhead, 45<sup>o</sup> pointed hammerhead, which was the highest among all hammerheads at any speed. The maximum impact load angle was 90<sup>o</sup>, and the lowest impact load angle was 55<sup>o</sup> in all cases. When the results of the experiments were compared with the results from the Finite Element Analysis (FEA) model, it was found that at an angle of 90<sup>o</sup>, the model results were similar to the results of all experiment cases. The maximum difference was 5.06 %, and the results from the angle model which gave load values closest to the 90<sup>o</sup> angle were 100<sup>o</sup> and 110° respectively.</p> ER -