This calculator is designed for the use of Accident Investigators. The crush analysis is based on the Crash 3 algorithm. More precise and more sophisticated programmes, such as 'AI Damage' from AiTS International, will give more precise results and will deal with additional aspects, such as spin out and post-impact directions.
The following assumptions are made by this calculator:
First, select the two vehicle categories and two collision types from the four dropdown lists below. This will calculate Stiffness Coefficients A and Stiffness Coefficient B.
Second, enter the Width of damage in the appropriate box.
Third, fill in either the next two (C1 and C2), next four (C1, C2, C3, and C4), or all remaining six (C1, C2, C3, C4, C5, and C6) boxes.
Finally, fill in the remaining three boxes (Force direction, Centre of Gravity to Force Direction, and Mass of vehicle), before clicking the Calculate button.
| Vehicle 1 | Vehicle 2 | |
|---|---|---|
| Vehicle category | ||
| Collision type | ||
| Stiffness Coefficient A | ||
| Stiffness Coefficient B | ||
| Width of damage (cm) | ||
| Crush measurement C1 (cm) | ||
| Crush measurement C2 (cm) | ||
| Crush measurement C3 (cm) | ||
| Crush measurement C4 (cm) | ||
| Crush measurement C5 (cm) | ||
| Crush measurement C6 (cm) | ||
| Force direction to surface normal angle (degrees) | ||
| CoG to Force Direction (moment arm) (cm) | ||
| Mass of vehicle (kg) |
| Energy dissipated (Joules) | ||
| Maximum impact force (Newtons) | ||
| Equivalent barrier speed (mph) | ||
| Delta V |
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