Sentences with phrase «neck shear force»
The second set of evaluation criteria is comprised of the maximum neck shear force and maximum neck tension measured on the dummy during the test.
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The Institute's dynamic ratings of good, acceptable, marginal, or poor are derived from two seat design parameters (peak acceleration of the dummy's torso and time from impact initiation to head restraint contact with the dummy's head) plus neck tension and shear forces recorded on BioRID during the test.
«That produces an S - shape in the neck, and that can develop a lot of shear forces in the neck,» Romilly says.
The Institute's dynamic ratings of good, acceptable, marginal, or poor are derived from two seat design parameters (peak acceleration of the dummy's torso and time from impact initiation to head restraint contact with the dummy's head) plus neck tension and shear forces recorded on the BioRID dummy during the test.
The full deceleration of the head, neck and torso, aggravated by the tightened seat belt, creates high tension and shear forces in the spine, brain stem, nerves and ligaments.
Significantly high shear forces develop in the neck and brain, the spinal curves straighten and the spine is compressed.