A study on the mechanical properties of beagle femoral head using the digital speckle correlation method

The mechanical properties of the femoral head are known to play an important role in the athletic performance of animals. In this paper, the full-field displacement and strain distributions of beagle femoral head samples in the U and V fields under loading were measured using the digital speckle correlation method (DSCM), and some deformation characteristics were analyzed. Young's modulus and Poisson's ratio were calculated to demonstrate the notable axial anisotropy of the femoral head. The axial compressive Young's modulus varies from 361 MPa to 583 MPa, and the transverse one is 213 MPa. The Poisson's ratio in the axial–transverse direction ranges from 0.14 to 0.29, and the one in the transverse–axial direction is 0.07. Experimental results validated the accuracy of this measurement, providing a potential reference for investigating the deformation performance of the femoral head.