Method of determining the elastoplastic behavior of...

Details Method of determining the elastoplastic behavior of... Method of determining the elastoplastic behavior of...

2006-05-23

2006-05-23

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Mechanical measurement system

C073S760000

Reexamination Certificate

active

07050912

ABSTRACT:
A method of determining the elastoplastic behavior of components, in particular of gas turbine plants, at high temperatures. First of all, the linear-elastic behavior is determined and the inelastic behavior is taken into account on the basis of the linear-elastic results by using the Neuber rule, the anisotropic characteristics of the components, as occur in particular through the use of single-crystalline materials, are taken into account in a simple manner by using a modified anistropic Neuber rule in the formσ*2=σep2⁡(1+A⁢C⁢αER⁢(A⁢⁢σep2σ02)n-1)whereA=inelastic anisotropic correction term,A=⁢12[F⁡(Dyy-Dzz)2+G⁡(Dzz-Dxx)2+⁢H⁢(Dxx-Dyy)2+2⁢L⁢⁢Dyz2+2⁢⁢MDz⁢⁢x2+2⁢⁢NDx⁢⁢y2] where F, G, H, L, M and N are the Hill constants,C=elastic anisotropic correction term, C=D•E−1•Dσ*=determined linear stress,σep=estimated inelastic stress,D=direction vector of the elastic and inelastic stressesE−1=inverse stiffness matrix,ER=reference stiffness,σ0=reference stress, and σα, n=material constants.

REFERENCES:
patent: 5736645 (1998-04-01), Chin-Chan et al.
patent: 6715364 (2004-04-01), Bernhardi et al.
patent: 101 18 542 (2002-10-01), None
patent: 1 249 694 (2002-10-01), None
patent: 03/076908 (2003-09-01), None
Search Report from CH 0402/02 (Jul. 4, 2002).
Search Report from PCT/CH03/00135 (Jul. 4, 2003).
Ramberg, Walter, William R. Osgood. “Description of stress-strain curves by three parameters.” National advisory committee for aeronautics. Technical note No. 902.
Tsao, T. P. et al., “Long term effect of power system unbalance on the corrosion fatigue life expenditure of low pressure turbine blades.” IEE Proc.—Sci. Meas. Technol., vol. 147, No. 5, Sep. 2000 (IEE).
Compendex abstract of Ekh, Magnus. “Modeling of inelastic response of metals with emphasis on cyclic viscoplasticity.” Engineering information inc. Nr. 1572, 2000 (Doktorsavh Chalmers Tek Hogsk; Doktorsavhandlingar vid Chalmers Tekniska Hogskola).
Inspec abstract of Vaz, M., D.R.J. Owen. “Aspects of ductile fracture and adaptive mesh refinement in damaged elasto-plastic materials.” Int. J. Numer. Methods Eng. (UK), International journal for numerical methods in engineering, Jan. 10, 2001, (Wiley).
Compendex abstract of Cligoj, C.C. “Finite deformation coupled thermomechanical problems and generalized standard materials.” Int.J. Numer. Methods Eng; International journal for numerical methods in Engineering, Jul. 30, 1998, (John Wiley and Sons Ltd, Chichester England).

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