- Unfortunately in June 2023, Connie, his wife and my mother, passed away.
Search found 1788 matches
- Mon Mar 25, 2024 12:34 pm
- Forum: McHenry News!
- Topic: Raymond R McHenry, Pioneer in Crash Reconstruction
- Replies: 5
- Views: 8825
Re: Raymond R McHenry, Pioneer in Crash Reconstruction
March 2024, Ray is 95 and healthy and doing great.
- Mon Mar 25, 2024 12:13 pm
- Forum: General Topics
- Topic: Is a Straight Line From Impact to Rest in Momentum Correct?
- Replies: 1
- Views: 1893
Re: Is a Straight Line From Impact to Rest in Momentum Correct?
March 2024: edited updated and added the graphics
- Sun Mar 24, 2024 11:24 am
- Forum: Collision Simulation, SMAC
- Topic: The Effects of Friction on EDRs and DeltaV
- Replies: 6
- Views: 22602
Re: The Effects of Friction on EDRs and DeltaV
March 2024, added mention and link For restitution effects, please see Effects of Restitution on the Application of Crush Coefficients for details on effects of restitution, which "reduces the residual deformation while increasing the total impact speed change". In this forum topic, we foc...
- Sun Mar 24, 2024 10:49 am
- Forum: Damage Analysis, CRASH
- Topic: What Speed Should I Use to Calculate CRASH3 A&B Coeff?
- Replies: 2
- Views: 1551
Re: What Speed should I Use to Calculate CRASH3 A&B Coeff?
Q: The argument behind the idea that we're getting to dV from damage and stiffness (and, of course, BEV) made me hesitate...maybe I read stuff wrong before and it IS dV we should be using. But, by my way of thinking, if I work it all the way back to Emori, for example, the input was always the spee...
- Sat Mar 23, 2024 1:33 pm
- Forum: General Topics
- Topic: Rollover Analysis: minimum speeds and roll velocity approximation
- Replies: 9
- Views: 9599
Re: Rollover Analysis: minimum speeds and roll velocity approximation
Q: (Posted to a Facebook forum) Can anyone here share a rollover formula? A: One of the responses was: During WREX 2016 a presenter gave a presentation on a new rollover formula. S=sqrt 13(d). The distance is from trip to final rest. I have used it several times and get within 5mph of the minimum sp...
- Sat Mar 23, 2024 11:58 am
- Forum: Damage Analysis, CRASH
- Topic: What Speed Should I Use to Calculate CRASH3 A&B Coeff?
- Replies: 2
- Views: 1551
Re: What Speed should I Use to Calculate CRASH3 A&B Coeff?
Q: Got into a discussion with someone and we ran into a "conundrum." It has to do with a reading of the various papers and such as it relates to stiffness coefficients. So say we have a set of crash test data and we want to find stiffness coefficients. The discussion hinges on the velocit...
- Wed Mar 13, 2024 6:36 pm
- Forum: msmac3D Licensee Notes
- Topic: msmac3D Ver 4.5.5 FEATURE HIGHLIGHTS, AVAILABLE NOW!
- Replies: 7
- Views: 14634
Re: msmac3D Ver 4.5.5 FEATURE HIGHLIGHTS, AVAILABLE NOW!
4.5.5 uploaded!
- Sat Mar 09, 2024 1:24 pm
- Forum: Damage Analysis, CRASH
- Topic: CRASH Damage Analysis Estimations at Higher DeltaVs?
- Replies: 0
- Views: 58
CRASH Damage Analysis Estimations at Higher DeltaVs?
Q: I am attempting to determine what research exists into how the CRASH algorithm may/may not overestimate DV at higher levels (i.e. 75mph). In my research I have found 1982 DOT HS 806 152 Accuracy & Sensitivity of CRASH by Smith and Noga which appears to show good correlation in the mid 60's D...
- Sun Mar 03, 2024 10:29 am
- Forum: Vehicle Safety
- Topic: "Moral Hazard" of safety devices and solutions?
- Replies: 0
- Views: 63
"Moral Hazard" of safety devices and solutions?
Read an interesting Op-ed article today in NY Time Opinion: Moral Hazard Has No Place in Addiction Treatment Which was about a concept called ' Moral Hazard " and included a mention of how it came into being which related to safety belts in cars?!! From the article "The University of Chica...
- Fri Mar 01, 2024 11:30 am
- Forum: General Topics
- Topic: What files should be produced for Simulation and Animation
- Replies: 3
- Views: 8880
Re: What files should be produced for Simulation and Animation
updated/refined with minor changes for clarification.