Brach Engineering :: VCRware® 3.3 – Experts in vehicular accident analysis & reconstruction
Our Mission
Brach Engineering is committed to the dissemination of information related to the analysis of, and solutions to, engineering problems, particularly those related to the reconstruction and analysis of vehicle collisions and pedestrian accidents. To this end, the engineers at Brach Engineering have authored three books and numerous technical papers on these and related topics. Additionally, the engineers at Brach Engineering have developed a suite of software programs, VCRware®, that provides analytical tools for the accident reconstruction community. The Brach Engineering website is intended to be a repository of this information.
SAE Publications
- SAE 2020-01-0639 — Sensitivity Analysis of Various Vehicle Dynamic Simulation Software Packages Using Design of Experiments (DOE)
- SAE 2018-01-0526 — Sensitivity Analysis of Simulated Postimpact Vehicle Motion Using Design of Experiments (DOE)
- SAE 2015-01-1433 — Nonlinear Optimization in Vehicular Crash Reconstruction
- SAE 2015-01-1419 — Reconstruction of Vehicle-Pedestrian Collisions Including an Unknown Point of Impact
- SAE 2014-01-0469 — Analysis of High-Speed Sideswipe Collisions Using Data from Small Overlap Tests
- SAE 2012-01-0608 — Uncertainty of CRASH3 ΔV and Energy Loss for Frontal Collisions
- SAE 2011-01-0094 — The Tire-Force Ellipse (Friction Ellipse) and Tire Characteristics
- SAE 2009-01-0102 — Tire Models for Vehicle Dynamic Simulation and Accident Reconstruction
- SAE 2007-01-0735 — Analysis of Collisions Involving Articulated Vehicles
- SAE 2007-01-0737 — Residual Crush Energy Partitioning Normal and Tangential Energy Losses
- SAE 2003-01-0491 — Modeling of Low-Speed, Front-to-Rear Vehicle Impacts
- SAE 2001-01-0898 — Throw Model for Frontal Pedestrian Collisions
- SAE 2000-01-0357 — Modeling Combined Braking and Steering Tire Forces
- SAE 980367 — Comparison of Tire Friction Test Methodologies Used in Accident Reconstruction
- SAE 980025 — Crush Energy and Planar Impact Mechanics for Accident Reconstruction
- SAE 971942 — Automotive Powerplant Isolation Strategies
- SAE 970957 — An Analytical Assessment of the Critical Speed Formula
- SAE 940722 — Uncertainty in Accident Reconstruction Calculations
- SAE 931321 — On the Dynamic Response of Hydraulic Engine Mounts
- SAE 871993 — Energy Loss in Vehicle Collisions
- SAE 870429 — Least Squares Collision Reconstruction
- SAE 870048 — A Review of Impact Models for Vehicle Collisions
- SAE 860018 — A Force and Energy Analysis: Vehicle Extraction with a Tow Strap
- SAE 860015 — Impact of Articulated Vehicles
- SAE 830468 — Impact Analysis of Two-Vehicle Collisions
- SAE 770014 — An Impact Moment Coefficient for Vehicle Collision Analysis
Other Publications and Papers
- R. Matthew Brach, David Fortenbaugh, Jon van Poppel, “Validation of the Han-Brach Vehicle-Pedestrian Impact Mechanics Model“, Collision Magazine, vol. 14, Issue 1, Spring 2020.
- Brach, Raymond M., “Impulse-Momentum Analysis of Multibody Vehicle-Pedestrian Collision Simulations“, presented at the 25th Annual EVU Congress, 2016, Bratislava, Slovakia.
- Brach, Raymond M., “Use of EDR Data in Vehicle Accident Reconstruction“, Collision Magazine, vol. 6, Issue 2, Fall 2011.
- Raymond M. Brach and R. Matthew Brach, “Insertion Loss: Train & Light-Vehicle Horns and Railroad-Crossing Sound Levels“, 158th Meeting, Acoustical Society of America, San Antonio, TX, Proceedings of Meetings on Acoustics, 2009.
- Brach, Raymond M. and R. Matthew Brach, “Tire models used in accident reconstruction vehicle motion simulation“, presented at the 17th Annual EVU Congress, November 6 – 8 2008, Nice, France.
- Brach, Raymond M., “Design of experiments and parametric sensitivity of planar impact mechanics“, presented at the 16th Annual EVU Congress, November 8 – 9 2007, Krakow, Poland.
- Brach, Raymond M. and R. Matthew Brach, “Analysis of Collisions: Point Mass Mechanics and Planar Impact Mechanics“, Collision Magazine, vol 2, issues 1, Spring 2007.
- Brach, R. M., “Adhesion, Hysteresis and the Peak Longitudinal Tire Force“, unpublished, 2006.
- Brach, Raymond M., “Formulation of Rigid Body Impact Problems using Generalized Coefficients“, Int J of Engrg Sci, Vol 36, 1, pp 61-72, 1998.
- Brach, Raymond M., “Calculation of Crush Stiffness Coefficients from Two-Vehicle Collisions“, unpublished, 1997.
- R. Matthew Brach and Alan G. Haddow, “The Nonlinear Response and Passive Vibration Isolation of Rigid Bodies“, 1996.
- Brach, Raymond M., “Classical Planar Impact Theory and the Tip Impact of a Slender Rod“, Int J Impact Engrg, Vol 13, No 1, pp 21-23, 1993.
- Brach, Raymond M., “Restitution in Point Collisions“, contribution to Computational Aspect of Contact, Impact and Penetration, Ronald F. Kulak and Leonard E. Schwer, Editors, Elmepress International, Lausanne, Switzerland, 1991, pp 167-181.
- Brach, Raymond M., “Vehicle Dynamics Model for Simulation on a Microcomputer“, Int J of Veh Des, Vol 12, #4, 1991.
- Brach, Raymond M., “Vehicle Collisions Analysis“, Chapter, Automotive Engineering and Litigation, Garland Law Publishing, New York, 1988.
- Brach, Raymond M., “Momentum and Energy Analysis of Automobile Collisions“, J. Morton, Ed, Structural Impact and Crashworthiness, Vol. 2, Imperial College, London, England, July 1984.
- Brach, Raymond M., “Identification of Vehicle and Collision Impact Parameters from Crash Tests“, Paper 83-DET-13, ASME Design Technical Conference, Dearborn, MI, 1983.
- Brach, Raymond M., “Nonlinear Parameter Estimation of a Vehicle Collision Model“, Proc 13th Annual Conf on Modeling and Simulation, Univ of Pittsburg, April 1982.