Young Modulus  Titanium  380 MPa  Bone  500…

  Young Modulus  Titanium  380 MPa  Bone  500 MPa  Cartilage  900 MPa  Ligament  1000 MPa  A titanium biomedical device transfers a force of 1200 N over a 10 mm2 area of a femur. It is known that in a normal femur joint the weight of 90kg is transmitted to the bone through the same 10mm2 area. Which situation presents the greatest strain on the femur bone? 

A researcher measures an axial strain of 400 με in the femor…

A researcher measures an axial strain of 400 με in the femoral diaphysis of a 70 kg adult during walking. Assume the Young’s modulus of cortical bone is 16 GPa and the cross-sectional area is 300 mm². Another student incorrectly assumes the femur has a cross-sectional area of 3 mm² and calculates the corresponding axial load. Which of the following statements is most accurate regarding the two calculations?