Multiaxial analysis
In: Local elastic-plastic strain methods
The methods grouped in this section are:
- with the normal load parameter only
- with the shear load parameter only
- combined solution
- original variant with the MSSR scheme preference
- variant with the MD scheme preference
- variant with the setting of effective normal strain according to Kim, Park and Lee [KPL99]
- variant with the cycle counting method from [WB96]
- Findley method modified by Socie to finite life
Because of the methods are based on e-N curves, the use of Newton-Raphson iterative formula for derivation of the resulting number of cycles is necessary. Palmgren-Miner cumulative law is applied for summation of fatigue damages of individual load cycles.
The basis of the methods being dependant on e-N curves means that the methods are suitable for a damage calculation in the region of finite life with number of cycles approx. < 1e5-1e6. The induced plastic deformation has to be covered in the load inputs. Since PragTic does not have any Neuber-like method incorporated for the multiaxial solution, the use of transient analysis is the only applicable solution.
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