Decomposition - Wang & Brown v.96

Decomposition - Wang & Brown

This is a special computational scheme that was published in [WB96] and can be described in several steps:

1) The load history is transformed to von Mises' equivalent strain.

2) The maximum value throughout the load history is picked (and designated as point A).

3) Relative strain tensors computed as a difference between actual strain tensor and the strain tensor in point A are computed.

4) Relative equivalent von Mises' strains are computed on them.

5) The maximum value is picked (point B).

6) Points A and B form one half-cycle, the point B splits the load history into two parts. The procedure with steps 1-6 is repeated for each of those two parts.

This scheme was programmed into PragTic. It should be usable universally in conjunction with any other fatigue analysis method, but currently it is usable only for the Wang and Brown method. The current version in PragTic is implemented as a standalone method WB 1996. Be aware, that the possibility to choose Wang & Brown v.'96 in the Decomposition dialogue is currently only fictitious for WB 1993 method and the rain-flow decomposition of resolved shear strain variable is used instead.

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