DO you know why the safety helmets are hemispherical?

Safety helmet is a kind of labor protection equipment that must be equipped in many working environments. It can be used to protect the head safety of workers.

Although most people once known or used safety helmets, do you know why all safety helmets are hemispherical? Shanghai Chengge answers to you.

In fact, there is a scientific principle behind this.

Scientifically speaking, hemispherical helmets are the strongest. The firmness of an object, except the material, its appearance structure is also very important. According to scientific data, the shape that can most withstand external impact is spherical and convex surface, which can distribute the external pressure along the convex surface, and the force at each place is more uniform, so the hemispherical structure has the largest stiffness. 

As a safety helmet worn by construction workers, for example, if there is a brick falling down from a height, accordingly hit the helmet, because of the effect of acceleration of gravity, the impact forced on the helmet are huge, will make a serious damage, but the smooth hemispherical shell can separate the concentrated force along the spherical, at the same time, The elastic liner in the inner edge of the cap can continue to be cushioned, thus greatly reducing the pressure on the head due to the impactive.

According to scientific speculation, the dispersion and cushioning of the helmet can reduce the impact force to about 5/6, enough to make the head well protected.

Therefore, according to the scientific experimental results, it is found that the hemispherical structure has a great effect on improving the overall protective effect of the helmet.