Question

(h=1.88 m=109.9 kg). This collusion was shown in class of the former CFL player. The net compressive force on the helmet and ultimately on the cervical bone for the smaller player was approximately 3517 N. This particular section of the spine has an outer radius of 23 mm and an inner radius of about 20 mm and a height of 7.5 mm. Assume the cervical bone is a hollow cylinder in the longitudinal axis and a rectangular cross section in the mediolateral axis. Please calculate the following (10 pts).
a. What is the moment of inertia along the longitudinal axis of the spine?
Ans (a):_______________________________
b. What is the stress along the longitudinal axis?
Ans (b):_______________________________
c. If the Young’s Modulus for the section of bone along the longitudinal axis is 0.35 GPa, what is the strain that is exhibited on the bone?
Ans (c):_______________________________
d. If the strain for failure is 0.6%, does the bone fail?
Ans (d):_______________________________
e. If the Poisson ratio for the players bone is 0.28, how much does the bone expand?
Ans (e):_______________________________
Consider the cartilage underneat the bone, if the young’s modulus is 12MPa, what happens to the cartilage and the cartilage has the same diameter of the bone, solid and a height of 3 mm during this collusion?
f. What is the moment of inertia along the longitudinal axis of the cartilage?
Ans (f):_______________________________
g. What is the stress along the longitudinal axis of the cartilage?
Ans (g):_______________________________
h. What is the strain exhibited on the cartilage?
Ans (h):_______________________________
i. If the strain for failure is 15% does the cartilage fail?
Ans (i):_______________________________
j. If the Poisson ratio for the player’s cartilage is 0.45, how much does the cartilage expand?
Ans (j):_______________________________

Answer 1