Discrepancy in radial displacement governing eq for a sphere from Dr. Allen Bower's text in section 4.1.3
Attached is a pdf file indicating a discrepancy in the governing eq for radial displacements in a sphere. I am + Dr. Bower's text is correct but I cannot reconcile my derivation with his so I am assuming there must be some underlying assumption or approximation I am not aware of.
Can anyone provide me with greater insight?
my email: jberg3 [at] unl.edu (jberg3[at]unl[dot]edu)