McHenry Forum - Crash Reconstruction & Simulation

we've updated our website and this article is now mobile friendly on the website! Please see: Crash Reconstruction Techniques and Accuracy For convenience we also include it here: Note: Word Accident changed to Crash per It's no Accident so use the word Crash instead Crash Reconstruction Techniques ...

We've updated our website and this article is now mobile friendly on the website! Please see: SAE TOPTEC: SMAC Computer Program or convenience we also post it here: SMAC Computer Program Brian G. McHenry, McHenry Software, Inc., Cary, NC ©McHenry Software, Inc. Presented at the SAE Accident Reconstr...

New: Use this link to go to the latest post on this thread Q: Are there formal studies done on what happens when a vehicle hits a pothole or rut at high speed on a wet road? What would happen to steering control, direction and speed of the car? Additionally, rain had washed some sand and soil from ...

Q: Is there any literature study indicating how much the bonnet of a car would dive on hard braking? What sort of range of values to expect as the vehicle weight shifts forward? A: What i believe you are asking is are there any tests with measurements of the vehicle pitch as a result of braking. Unf...

We were recently notified of a recent advertisement from Engineering Dynamics about: " HVE Simulation Technology:Advanced Tire-Terrain Models " This advertisement is an endorsement of some of our 30+ year old McHenry extensions and refinements to the HVOSM program. McHenry invented HVOSM o...

In yet another great magazine cover The Economist has 'Planet of the Phones: By 2020 80% of adults will have a supercomputer in their pocket"
Enjoy!

Feb 25, 2015: Today we performed some quick Benchmark tests of the msmac3D 3D simulation program. This is a followup to our Feb 2014 msmac3D benchmark tests and show a dramatic improvement. The simulations in 3D run 2-4 times faster than Real time meaning a 10 sec simulation runs in around 3 seconds...

Be sure to also review the new DEMO videos being posted up.

• How to create a msmac3D simulation in less than 3 minutes!!
  
  Also see msmac3D instructional Videos

Found another reference which includes some documentation of tests of bumper height when traversing/impacting different curb types and at different speeds and angles.

• NCHRP 537 Recommended Guidelines for Curb and Curb–Barrier Installations

for example:

Q: (rcd via email) A car went out of control and mounted a curb (grass median) at an approach angle of about 45 degrees. It went airborne onto the opposite side of the road, going over the bonnet of a car traveling in the opposite direction, and pushing the car and its bonnet cover to the side. Any ...