002114 sas ip inc vm203 dynamic load effect on

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Unformatted text preview: tions and Modeling Notes The problem is solved first using 2-D viscoelastic elements (VISCO88) and then using 3-D viscoelastic elements (VISCO89). In the 2-D case, due to the fact that the stresses will be the same in X and Z directions because of symmetry, an axisymmetric analysis is performed with the nodal degrees of freedom coupled in appropriate directions. The radial thickness of 0.2 cm is arbitrarily selected. Nodes 21 through 25 are coupled in the X-direction (radial coupling). Nodes with the same Y-location are coupled in Y-direction (axial coupling). In the 3-D case, an arbitrary thickness of 0.2 cm is assumed in both Y and Z directions. Nodal degrees of freedom are coupled in appropriate directions to simulate the correct physical behavior in the finite element model. The alumina is not a viscoelastic material, however, its material properties are input using viscoelastic format so that only one element type (VISCO88 in 2-D and VISCO89 in 3-D) can be used for both materials. Also, note that the viscoelastic material does not require the MP command for inputting t...
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This note was uploaded on 12/09/2010 for the course DEPARTMENT E301 taught by Professor Kulasinghe during the Spring '09 term at University of Peradeniya.

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