Authors
Abstract
This paper presented a numerical methods based on FEM were used to study
the effect of temperature on the dynamic characteristic of composite cylindrical
conical shell with different cone angle and wall thickness. The study taken into
account the effect of temperature on the material properties of the selected
material and the effect of pre stressing on the natural frequency of the shell. A
general conclusions could be obtained from the static analysis ,i.e. for higher
circumferential wave number, the effect of increasing the thickness is to produce
higher natural frequencies. The natural frequency of the system may drops by
about (12 %) as a result of the degeneration of the material properties due to
temperature elevation. The higher circumferential wave number, the more
pronounced is the influence of ply orientation on the resulting natural frequency
changing the ply orientation for 0/90/0 to 75/-75/75 may increase the natural
frequency by about (100 %). Finally the transient dynamic stresses may exceeds
the design stress by a bout (50 %).
Keywords
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