Comparative Study upon Stress and Strain in Femoral and Tibia Bones, for Different Age Persons, Using Extensometers and F.e.m

The paper presents the achievement of the stress and strain intensity in femoral and tibia bones, for different age persons, using two different modern methods. For an exactly value of strain, experimentally obtained, the author has developed an original structure having the main goal to fix the extensometer on the foot skin. It is well known that the human skin does not permit the attachment of a usual inductive extensometer upon it, due to the sliding surface. Using the Finite Element Method, it was possible to take a larger view of the stress and strain state into those two bones, not only in a particular section, as it was made using the extensometer.