FRONTAL STIFFNESS
COEFFICIENTS
Expedite your crush analyses with our stiffness coefficients, calculated using reliable, published methods. Simplify and bolster your reconstructions with modern, forensically sound data that holds up.
Advancing the Standard
Lightpoint’s stiffness datasheets go further, using an exhaustive process that captures each vehicle’s true structural response to provide reconstructionists with highly accurate coefficients.
Modern methods combined with our extensive database of Vision Point Clouds put Lightpoint in a unique position to do something that hasn’t been done before: build a scientifically robust database that accounts for air gap.
All science, no guesswork.
Calculated, Not Estimated
In 2024, Neal et al. published a detailed method for calculating stiffness coefficients that properly accounts for air gap.
Building on that work, and integrating approaches from the Strubles’ textbook and Neptune’s method for B₀ estimation, we developed a process that merges modern test data with analytical rigor. Here’s the short version of how we do it:
Measure free space and crush width from Vision Point Clouds
Analyze accelerometer data to determine speed/distance
Develop force-displacement curves via barrier load cell data
Calculate residual crush and compare to raw data
Key Features
Cited Sources
All foundational data can be traced to its original source, whether it's a crash test, point cloud, or paper.
Published Methods
All methods are derived from credible, published sources, from SAE to authoritative textbooks.
The Data You Need
A, B, G, and Kv coefficients are presented for each test, with best-fit values included for multiple tests.
Stepwise Clarity
Every step of the process is shown, so you can see exactly how the results are derived.
Air Gap and Raw
Both air gap and raw crush values are provided, allowing you to compare and choose which tests to use.
Crash and SMAC Plots
Graphs for both air gap and raw data are included, so you can clearly see the fit and difference.
Sample Datasheet
Built for the Community
Lightpoint is uniquely equipped to perform the rigorous analyses required to build this database of stiffness coefficients, made possible by our extensive library of Vision Point Clouds and the published work of our colleagues.
We’re proud to make that effort so you don’t have to, delivering the most accurate stiffness coefficients available. It’s not an easy process, but once it’s done, the entire community benefits. Browse our database of coefficients below.
Browse the Database
[STIFFNESSCOUNT] Stiffness Coefficients Currently Available
