PSI - Issue 12

Venanzio Giannella et al. / Procedia Structural Integrity 12 (2018) 479–491 V. Giannella Structural Integrity Procedia 00 (2018) 000 – 000

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Fig. 1. (a) FEM model and (b) submodel; dashed red circle showing the volume extracted in a DBEM submodelling phase.

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Fig. 2. Main material properties vs. temperature for the considered superalloy: (a) Young’s modulus, (b) expansion coefficient, (c) Poisson’s ratio.

In order to compute the stress field with the highest accuracy in the surroundings of the most critical region, a FEM submodel (Fig. 1b) with a finer mesh, 126000 SOLID187 (10-node tetrahedral) elements, is developed and solved for each of the six aforementioned mission points.

Figure 3. Mission profile with the six considered load cases: round per minutes (rpm) vs. time.