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Accident Reconstruction Science

Accident Reconstruction Science
Genre: Accident reconstruction
Publisher: Lawyers & Judges Publishing Company, Inc.; 4 edition (October 3, 2011)
Publication Year: 2011
Length: 416 pages
ASIN: 1936360039
ISBN: 1936360039
This 4th edition examines the science of reconstructing and analyzing an automobile accident, using text readily understood by any reader with a basic understanding of accident reconstruction.
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About the Book

Written for the re-constructionist, attorney, automotive engineer, or other interested professional, this edition examines the science of reconstructing and analyzing an automobile accident. Learn how to analyze accidents and judge speed from the final position of the vehicle. Also covered are topics such as sideswipe collisions, rollovers, calculations of collision timing and accelerations and measuring vehicle crush, among many others. Dr. Alan Watts explains basic concepts of physics, and then applies them to accident reconstruction. The text will be readily understood by any reader with a basic understanding of accident reconstruction; however, full details and equation derivations are provided for those with either higher technical education or a wish to more fully understand the issues.

Topics Include

  • General material loading responses
  • Vehicle crush response for impacts into rigid barriers
  • Crush responses in two-vehicle, low speed collisions
  • Computer modeling methods
  • Energetics of collisions
  • Bumper behavior
  • Integrated hits and other effects
  • Interesting mechanical models
  • Comparisons between the CRASH3 and the POD models
  • Proper solutions to various problems
  • Rollovers and side trips
  • A Typical Mathcad Solution
  • Side-Swipe Collisions
  • Measuring the Crush
  • The Heavy Vehicle versus Light Vehicle Problem
  • Conservation of Linear Momentum
  • Event Data Recorders (EDRs)
  • Going Round the Bend: Critical Yaw Velocity and Steering Logic
About the Author
Alan J. Watts

Alan J. Watts, Ph.D., is presently a consultant on accident reconstruction and biomechanics and the owner of Watts-Co in Albuquerque, NM, which he started in 2000. From April 2000 to September 2001 he also worked (by invitation of the owner) as the chief scientist for Permacharge Corporation in Rio Rancho, NM, a company that specializes in electrostatic charging of various materials, where his job was to explain how their existing system was actually working and to suggest improvements and options. Prior to that he was the chief scientist at POD Associates, Inc., in Albuquerque, NM, a company that initially performed defense-related U.S. government contract work before concentrating on computer programming/information systems. Prior to that he was the senior staff scientist at Ktech Corporation in Albuquerque, NM, another U.S. government contractor working on defense issues. He has also been recently appointed to be an adjunct professor at the Union Institute and University (based in Cincinnati, Ohio), overseeing a Ph.D. course in biomechanics. He received his B.Sc. (1965) and Ph.D. (1969) in physics from Exeter University, England. His Ph.D. included studies of metals using ESR (electron spin resonance) and NMR (nuclear magnetic resonance the forerunner of the medical MRI). He performed research for the British government at the Atomic Weapons Research Establishment, where he studied the effects of dynamic impacts, the use of high explosives, and the effects of rapid, very strong energy deposition in materials (due to x-rays, electrons and protons), which automatically involved the studies of shockwave behavior, and material failure modes (plastic flow, rupture, material spallation, melting, vaporization and ionization). His studies ranged from the design of low-impulse momentum gauges to the use of high-pressure stress gauges, and the synergistic effects of thermal-mechanical material responses, including aspects of nuclear weapon designs. Diagnostic techniques used included very powerful flash x-ray machines, capable of taking x-rays of rapidly moving opaque objects on time scales of microseconds. He is a member of the American Association for the Advancement of Science (AAAS), a member of the National Association of Professional Accident Reconstruction Specialists (NAPARS), a member of the ARC Network, and a member of the Society of Automotive Engineers (SAE). He has authored over one hundred refereed technical publications and presentations on behalf of government, and has acted as a peer reviewer on several publications of others. He has given talks concerning low-speed accidents to both the Defense Lawyers Association and the Trial Lawyers Association. He has also given similar talks at the Institute for Police and Technology Management (IPTM) in Jacksonville, Florida, and to the Institute of Law Enforcement Education, Pennsylvania.

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