Biomedical Engineering Reference
In-Depth Information
Table 7.8
Body depth (Deutsches Institut für Normung E.V.)
of human body models is based on the body depth according to Table
7.8
in which
is the distance between front and back side of the torso measured in an upright body
position with the heels, buttocks and back (especially the shoulder region) in
contact with a straight wall (Deutsches Institut für Normung e.V. 2006).
7.1.5.1 Deformation Analysis of the Spine
Based on the findings outlined previously, interaction simulations were carried out
with the body models in the lateral posture and the bedding system LS2 employing
the factorized foam materials F0.25, F0.5 and F0.75 with varying membrane
pressure. To evaluate comfort, the deformation of the spine at static equilibrium was
analyzed. It was assumed that the ideal spine geometry is horizontal (parallel to the
undeformed mattress surface), representing the undeformed and unloaded state.
Figure
7.16
qualitatively illustrates the interaction of body and bedding system.
