Vibrations of Shells Composed of Composite Materials
This Chapter is in no way a comprehensive portrayal of the voluminous literature on the vibration of composite shells. Subsequent to studying the vibrations of isotropic shells in Chapter 12, the intent here is to provide some insight into the vibration behavior, some techniques available for solution, and some awareness of the peculiarities associated with composite shells.
Histopathologic studies have demonstrated microshards from silicone elastomer metatarsophalangeal joint implants in adjacent tissues in a setting of chronic inflammation and in inguinal lymph nodes. Cytologic smears of synovial fluid from symptomatic implanted joints should show these refractile, nonpolarizing microshards in the reactive inflammatory context. Nonspecific enzymatic inflammatory activity contributes to further destabilization of the implants, eventuating in symptoms and signs requiring prosthesis removal. Cytopathologic examination of aspirated fluid from the vicinity of a symptomatic implanted joint demonstrates foreign body reaction to silicone elastomer, predicting a need for intervention before the local damage is severe and disabling