ABAQUS user subroutines for the simulation of viscoplastic - loicz

More documents

Recommendations

Info

28 Fig. 13. FE-mesh and loading condition
Fig. 14. Maximum. principal damage after 34000 h Fig. 15. Crack initiation at a cavity Fig. 16. Max. principal strain after 34000 h Fig. 17. Max. principal stress after 34000 h 5.4 TiAl turbine blade — CHABOCHE model coupled with damage A model turbine blade made of a TiAl intermetallic alloy developed at the GKSS Research Centre is used as object of the FE-calculation. The blade has a length of 224 mm. The material parameters of the CHABOCHE model have been estimated by MOHR [1999], as listed in Table 5. Table 6 gives the corresponding material parameters of the damage model used for the calculation. The continuum element C3D4 of the element library of ABAQUS is used. The number of nodes is 1476 and the number of elements is 4825. The blade is subject to centrifugal forces, only, at a constant rotation speed of 40000 1/min; the density of TiAl is 3.8 g/cm 3 . Geometric non-linearity has been considered. The distribution of the maximum damage at t = 9060 hours is shown in Fig. 18. It obviously ocurs at the root of the blade which after all has not been modelled realistically. The calculation is just supposed to 29
Page 1 and 2: Technical Note GKSS/WMS/01/5 intern
Page 4 and 5: 0. Nomenclature 3 1. Introduction 7
Page 6 and 7: R ∞ Wi Z I , Z D Zij 6 saturated
Page 8 and 9: W internal variable, eq. (20b) four
Page 10 and 11: where S is the CAUCHY stress tensor
Page 12 and 13: 12 0 for x ≤ xm 1 h(x) = 2 1− c
Page 14 and 15: flow rule: E Ý i = p Ý ˜ S ′
Page 16 and 17: 16 −1 −1 D1 = 0 , L1 = 0, Z i1
Page 18 and 19: parameters of Tables 2 and 3, and t
Page 20 and 21: 20 Fig. 1. Experiments and model pr
Page 22 and 23: 22 Fig. 3. Contour plots of the max
Page 24 and 25: 24 Fig. 5. Contour plots of directi
Page 26 and 27: 26 Fig. 6. FE-mesh and loading cond
Page 30 and 31: proove that the model performs well
Page 33 and 34: 6. References AI, S.H.; LUPINC, V.
Page 35 and 36: 7. Appendices: ABAQUS-Inputfiles 7.
Page 37 and 38: ** auflagerung ** *BOUNDARY, OP=NEW
Page 39 and 40: ** E, nu, Do, n, K1, K2, K3, m1 149
Page 41 and 42: ** ====== 2. load ein ** *STEP, INC
Page 43 and 44: 7.3 Appendix 3: Single crystal plat
Page 45 and 46: *NODE FILE, FREQUENCY=0 *EL FILE, F
Page 47 and 48: 7.4 Appendix 4: TiAl turbine blade
Page 49 and 50: *AMPLITUDE, NAME=CYCLEONE, DEFINITI

ABAQUS user subroutines for the simulation of viscoplastic - loicz

Create successful ePaper yourself

Delete template?

Save as template?