Experimental investigation of maximum stress concentrations in a femur bone by photoelastic approach

Abstract EN

Progress in experimental stress analysis methods furthers the understanding of stress distribution in bone structures that are essential to know when performing successful implants.

biomechanics requires professional methodologies to solve complex problems.

this includes the measurement of physical reactions caused by loads that are impractical in nature.

the maximum stress distribution behavior of a human femur bone under the action of startling loads caused by accidents/sporting activities was investigated through the photoelastic method.

the experiments were carried out using a circular polariscope at different input loads and boundary conditions.

the stress concentration factor was computed through fringe orders that are related to the stresses obtained from the model.

A 2D-scale model of the femur bone was developed with an acrylic material to capture the stress field by optical illumination method.

photoelastic stress analysis revealed the maximum shear stress in the plane of the model and the principal stress difference with high reliability.

the nominal stress magnitudes were computed from the fringe order by supplementary data and numerical analysis.

state of stress in the femur at different instances was captured through multiple oblique views of the isochromatic fringes.

the novel fringe interpretation method facilitated the identification of suitable material for implants with a high factor of safety at actual loading conditions.