organized by the Institute of Thermomechanics of the CAS, v. v. i.,
every first Wednesday of the month at 10:00
in the Conference Room B in the main building of the Institute of Thermomechanics of the CAS, v. v. i. (see directions)
 

Contact persons: Dr. Radek Kolman, Dr. Hanuš Seiner

 

Wednesday, May 6, 2015, 10:00
 

 

Abstract:  First, the laboratories of the Department D4 - Impact and Waves in Solids will be briefly introduced. Next, the contribution will be aimed at the long-term development of a general three dimensional contact algorithm for the solution of complex engineering problems including the effects of material and geometric non-linearities. The key feature of this algorithm is that the contact search is performed at the Gaussian points rather than the nodes. The method was shown to be consistent with the variational formulation of a continuum problem, which enabled easy incorporation of higher-order elements with midside nodes to the analysis. The test problem involved creep analysis of high-pressure casing of the DSPWR steam turbine. Material properties were described by the probabilistic exponential model with damage. The FE prediction of permanent displacements in time 10 thousand and 200 thousand hours and a deformed shape of the dismantled casing was obtained. The analysis was performed in the FE code PMD (Package for Machine Design) developed at Department D4. The results were compared with FE code ANSYS.