The role of muscle tensing on the force : deflection response of the thorax and a reassessment of frontal impact thoracic biofidelity corridors.

Auteur(s)
Kent, R. Bass, C.R. Woods, W. Salzar, R.S. & Melvin, J.
Jaar
Samenvatting

This paper evaluates how muscle tensing changes the structural response of the dynamically loaded thorax. Nine porcine thoraces with both ventral (supine) and dorsal (prone) loading were used to quantify the effect. Muscle tensing was assessed using repeated tests on a subject with and without forced muscle contraction. Dynamic (~1.25 m/s) and quasi static tests were performed with a potentiometer and load cells to calculate effective thoracic stiffness. The results show that the effect of muscle tensing decreases with increasing chest deflection, which is supported by the limited human data available. The peak force increases with muscle tensing for chest deflection levels up to about 20%, after which the peak force changes negligibly when the muscles are tensed. The shape of the force-deflection curve, and therefore the work done by the deforming thorax, do, however, depend upon muscle tensing regardless of the peak deflection level attained. The findings are discussed relative to current thoracic biofidelity corridors, which include an adjustment to account for muscle tensing. For the covering abstract see ITRD E141807.

Publicatie aanvragen

1 + 0 =
Los deze eenvoudige rekenoefening op en voer het resultaat in. Bijvoorbeeld: voor 1+3, voer 4 in.

Publicatie

Bibliotheeknummer
C 49856 (In: C 49848 CD-ROM) /84 / ITRD E141815
Uitgave

In: Proceedings of the 2004 International IRCOBI Conference on the Biomechanics of Impact, Graz (Austria), September 22-24, 2004, Pp.

Onze collectie

Deze publicatie behoort tot de overige publicaties die we naast de SWOV-publicaties in onze collectie hebben.