banner ad
Experts Logo

articles

Trends in Automobile Safety: Analyses of Recent NCAP Front Crash Tests

By: Dr. Mukul Verma
Tel: (248) 971-0705
Email Dr. Verma

View Profile on Experts.com.



This article discusses some findings about automobile safety in frontal crashes. As is known, the NHTSA as part of their 'New Car Assessment Program' (NCAP) with the stated intent of helping customers select vehicles that are 'safer' according to NHTSA's ranking of 'more stars'. This rating system was revised some years ago for automobiles of model years 2011 and later (http://www.safercar.gov/ staticfiles/safetytech/st_landing _ca.htm). One of the interesting aspects of the new NCAP is that NHTSA publishes an 'overall score' for the vehicle's crashworthiness by combining the scores from frontal crash, side impacts and rollovers. Other significant changes in the NCAP are the addition of a test dummy representing small occupants, the inclusion of new injury-related parameters and significantly raised thresholds for achieving the highest (five stars) rating. Since wide publicity is given to NCAP scores and all vehicle manufacturers try to achieve the highest possible ratings for their new product, these ratings serve as mandates in vehicle design.front end collision picture

NCAP Tests for Frontal Crashes:The test configuration for this mode is 35 miles per hour impact of the vehicle into a fixed rigid barrier. This simulates crashes with fixed and rigid objects on the road and also represents full frontal crash of the car with another identical car. In these tests, the driver is represented by an anthropomorphic test device (ATD) simulating a fiftieth percentile male whereas the front passenger ATD simulates a fifth percentile female. The measured parameters are the responses of head, chest, femurs as well as the forces and moments on the neck. These measurements are used to calculate 'relative risk' scores which are then translated into separate 'stars' for the driver and the passenger. According to NHTSA, the following relationship exists between the ratings ('stars') and the risk of injury in frontal crashes.

star rating system piccture

ANALYSIS OF NHTSA'S TEST DATA

Background:The figures below show a driver ATD in a test as well as its response parameters. All the responses have been normalized (with different normalization factors as described in NCAP test procedures) so that they can be compared in one plot.

. . .Continue to read rest of article (PDF).


Dr. Mukul Verma, is a well-known expert in Automobile Safety and Crashworthiness, Vehicle Structures, Product Design, and Statistical Analyses of Traffic Trends and Regulations . He has worked in many engineering and management positions at a major automobile manufacturer including assignments in R&D, vehicle design, analysis and testing and engineering program management.

©Copyright - All Rights Reserved

DO NOT REPRODUCE WITHOUT WRITTEN PERMISSION BY AUTHOR.

Related articles

9/6/2010· Automotive - Vehicular

Airbag Deployments, Vehicle Structure And Occupant Safety Issues

By: Mukul Verma, PhD

Airbags in modern automobiles have been around for many years and their record in improving occupant safety in crashes is generally well accepted. However, many questions still arise regarding their deployment and performance in crashes.

neinstein-photo.jpg

9/22/2009· Automotive - Vehicular

Reviewing Drivers' Logs

By: Ned Einstein

In my review of more than 80 public transportation-related accidents and law suits, one almost universal theme has been the absence of any log review. This failure has generally combined with another common theme: A vehicle running behind schedule. The relationship between these two themes is easy to both understand and demonstrate - as is the acknowledgement that they constitute a genuine safety problem. But in a courtroom, the fact that system management failed to notice the vehicle running late - and worse, failed to even look for it - translates into a liability problem as well.

neinstein-photo.jpg

10/5/2019· Automotive - Vehicular

Autonomous and Inevitable: Drivers v. Robots, Part 1

By: Ned Einstein

This series of installments, which shall appear periodically, will examine some likely reactions to the robots by drivers.

;
Experts.com-No broker Movie Ad
Unicourt Logo Button

Follow us

linkedin logo youtube logo rss feed logo