A two-dimensional recruitment model for the skin

In this paper a 2-dimensional recruitment model for a planar soft tissue is presented, able to compute the local collagen fibers displacement caused by the application of a concentrated force and to evaluate the damage of the elastin matrix and on the fibrous component. The model assumption is that the collagen fibers oppose to the force by means of geometrical modification and the generation of traction forces; the scratching of elastin would be driven by the orientation changes of the collagen fibers. With reference to the skin, a layer with thickness equal to 3 mm has been modeled. An applied force of 0.75 N preserve the fibrous component from rupture. This value is the limit value; beyond it the collagen fibers start to fail whereas the elastin matrix disrupts also for lower values. This recruitment model can provide information about the stress state surrounding wounds in the skin, which is of interest because of the role that the stress plays in the healing process.