Week Eight

           Between last week and the beginning of this week, we have collected the results from the Three Point Flexural Test, figured out the Bending Stiffness and Young's modulus, and analyzed data. 

             We noticed that the Young's modulus and the Bending Stiffness decrease as the amount of time that the bones are submerged in 100% acetone increases. This holds true for the hollow cylindrical, normal bones and the scaled bones. However, there is one exception: in the loading test #8, the data we obtained for the modified femur that is treated with acetone for 60 seconds did not turn out as expected. The obtained Young's modulus and Bending Stiffness increased. As we examined this modified bone model after the test, we noticed that the breaking point was not in the middle of the bone's length. Instead, it was between the mid-shaft and the trochanter of the bone. Meanwhile, in the remaining models, the breaking point happened to be in the middle. This error may have affected the accuracy of our data in loading test #8. So, we've decided to overlook the result from loading test #8. 

             At the end of this week's lab, we returned to our bone model on AutoCad to re-modify the dimensions of its frontal and transversal planes. We sent out the adjusted model with the new dimensions for 3D printing.