DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click
HERE to register or log in.
Accession Number:
AD0652893
Title:
BIOPHYSICAL MECHANISMS AND SCALING PROCEDURES APPLICABLE IN ASSESSING RESPONSES OF THE THORAX ENERGIZED BY AIR-BLAST OVERPRESSURES OR BY NONPENETRATING MISSILES
Descriptive Note:
Technical Progress rept.
Corporate Author:
LOVELACE FOUNDATION FOR MEDICAL EDUCATION AND RESEARCH ALBUQUERQUE NM
Report Date:
1966-11-01
Pagination or Media Count:
50.0
Abstract:
A mathematical model was devised to study the dynamic response of the thorax of mammals to rapid changes in environmental pressure and to non- penetrating missiles impacting the rib cage near the mid-lateral point of the right or left thorax. Scaling procedures are presented for similar animals relating, for a given degree of damage, the body mass of the animal to various parameters describing the exposure dose. Internal pressures computed with the model for a dog exposed at the end plate of a shock-tube are compared to those measured with a pressure transducer inserted in the esophagus down to the level of the heart. Computed time-displacement histories of missiles following impact with the right side of the thorax are compared to those obtained experimentally by means of high-speed motion picture photography. High internal pressures predicted with the model for non-penetrating impact are compared to those obtained experimentally and theoretically for exposure to air blast. Experimental data are presented arbitrarily assessing lung damage in animals struck by non-penetrating missiles constant impact area as a function of missile mass and impact velocity. These data are compared for several missile mass-velocity combinations with those computed using the mathematical model. Similarities in the dynamic responses of the thorax to air blast and to non- penetrating missiles are discussed.
Distribution Statement:
APPROVED FOR PUBLIC RELEASE
