McHenry Forum - Crash Reconstruction & Simulation

A question came up on DeltaV for the situation of Occupant vs Vehicle Deltav,
see

• Occupant v Vehicle Gs (acceleration) in Rear End Crash

Question: I have a relatively low speed rear-end impact. Biomedical guy is saying whatever the lead vehicle experiences in Gs is cut by 60% for the driver due to body sinking into the soft seat. I found a 2001 SAE research study that says the opposite. They measured acceleration of vehicles and bod...

A response posted To the Linkedin Topic : actually I’ve proven that my point is correct in many case in court also The vehicles ECU is designated a terminal unit which stores data obtain whilst the vehicle is being driven by an individual therefore the information stored is relevant only to the per...

New: Use this link to go to the latest post on this thread In response to a post to LinkedIn where one of the responses questioned about needing driver AND vehicle owner consent to read the EDR of a vehicle in a crash, I decided to start a thread on EDR data etc and so if you have any information, ...

On the Napars Facebook page they brought up Effective Drag for a rolling vehicle: This is a topic which clearly has a "seminal" paper that everyone handling crash analyses should be familiar with SAE Paper 890859 One might also do well to review Searle's 1983 SAE paper on pedestrian crash ...

Just saw this posted up and figured time to start posting up articles on infotainment and other data in your vehicle. So here's a start! Think it is great (that crimes can be solved!) Insecure wheels: Police turn to car data to destroy suspects' alibis Looser privacy standards for vehicle data are a...

A Response posted to Facebook NAPARS page: Q: So maybe the tires are getting involved at 35, but not 30? Interesting. Our Response: That is possible. Also sorting through the test result data might allow sorting with respect to tire size, overhang and whether tire deflated or not Then it will might...

Dec 23, 2020: New post on Restitution by NAPARS/Wade on Facebook : Monson and Germane reported on a bunch of full-barrier crash tests at 30 and 35mph, and found a higher restitution value for the higher speeds, more or less across the board . This is contrary to our expectation that e should go down...

We recently responded to some questions on simulation posted to the INCR Forum Simulation Analysis effects of input variations and it included our issues with crash simulation programs which use simplified momentum solutions. These include PC-CRASH , Virtual Crash , Planar Impact Models , and others...

Another response on the INCR thread included the following statement/question on Simulation: Q: For those who are doing the simulations, correct me if I am incorrect on this, but if you do a simulation, and it overlays the physical evidence, vehicles hit in the correct locations, stop in the correct...