Determination of peak deflections from human surrogates using chestbands in side impact tests. Med Eng Phys 2013 Aug;35(8):1181-7
Date
01/30/2013Pubmed ID
23357337DOI
10.1016/j.medengphy.2012.12.012Scopus ID
2-s2.0-84879025291 (requires institutional sign-in at Scopus site) 7 CitationsAbstract
To understand the biomechanics of the human body in motor vehicle environments, physical models including anthropomorphic test devices (ATD) and biological models (postmortem human surrogates) are used, and sled tests are conducted. Deflection is often used as a biomechanical variable to characterize the effects of impact loading and derive injury criteria. The objective of the present study was to evaluate different techniques and recommend a methodology to determine the peak thorax and abdominal deflections from temporal contours using chestbands in oblique lateral impacts. The side impact ATD WorldSID representing human surrogates was positioned on a seat. The seat was rigidly fixed to the platform of an acceleration sled. The oblique load-wall fixed to the sled consisted of separate and adjustable plates to contact the shoulder, thorax, abdomen, and pelvis. Two 59-gage chestbands were wrapped on the thorax and abdomen. Tests were conducted at low, medium, and high velocities (3.4, 6.7, and 7.5m/s) and three methods, termed the spine-sternum, bilateral, and spine-box, were used to determine the global peak deflection and its angulation. Results indicated that all three methods produced very similar angulations, for all velocity tests, and at both thorax and abdominal regions. However, maximum deflections were the lowest in the spine-sternum, followed by bilateral and spine-box methods, with one exception. Based on the development of deflection contours, locations used in the definitions of the origin, and accuracy in identifying critical locations/points in time-varying contours, results of the present study indicate that the bilateral method is the optimum procedure to determine the oblique peak deflection vector in biomechanical tests.
Author List
Yoganandan N, Humm JR, Pintar FA, Maiman DJAuthors
Frank A. Pintar PhD Chair, Professor in the Biomedical Engineering department at Medical College of WisconsinNarayan Yoganandan PhD Professor in the Neurosurgery department at Medical College of Wisconsin
MESH terms used to index this publication - Major topics in bold
AbdomenAccidents, Traffic
Automobiles
Elastic Modulus
Equipment Design
Equipment Failure Analysis
Hardness
Humans
Manikins
Monitoring, Ambulatory
Physical Stimulation
Reproducibility of Results
Sensitivity and Specificity
Stress, Mechanical
Thorax
Transducers, Pressure