Head Impact in Vehicle Interior

With the aid of the Finite Element Method, head impact analyses are conducted with reference to various energy-absorbing components.

A head impact in the vehicle interior is broken down into 2 large areas.

head impact

regulation: FMVSS 201

• free-moving headform (FMH); dummy head
• impact speed 24km/h (v = 19 km/h in head airbag area)
• impact area (see picture at bottom right)

<br>FMH: Modified Hybrid III Dummy Head

<br>Impact Point for FMH in Accordance with FMVSS 201

limit value

• recording of the acceleration via measuring sensors in the head

• definition of the impact configuration via the allocation of horizontal and vertical angles (according to FMVSS 201)

• HIC = Head Injury Criterion as a measured variable limit value HIC (d) < 1000

head impact simulation using a head impact pendulum

regulation: FMVSS 201 and ECE R21

• ball diameter 165 mm

• pendulum mass 6.8 kg

• pendulum length 795.5 mm

• rotation core z-coordinate from the h-point

• impact speed 24.1 km/h

(USA with passenger airbag v = 19.3 km/h

• impact area (see picture at bottom right)

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<br>Impact Area