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REXS Specification

FKM evaluation points

Notice

Change from REXS version 1.3

Modeling of FKM evaluation points is new in REXS 1.4

The FKM Guideline ("Rechnerischer Festigkeitsnachweis für Maschinenbauteile“ des Forschungskuratorium Maschinenbau) offers both a calculation method with nominal stresses at common notch locations (similar to DIN 743) as well as a calculation method with local stresses for components of any shape. The FKM evaluation point component (fkm_evaluation_point) was created for the associated parameters.

FKM evaluation points can be used as follows:

  • The FKM evaluation point can be connected with a Notches via an assembly relation. In this case, it uses the coordinate system of the associated shaft.

  • The FKM evaluation point can be connected with a notch calculation position of a shaft-hub connection via an assembly relation. In this case, it uses the coordinate system of the associated (inner) shaft.

  • The FKM evaluation point can be assigned to Assembly groups | assembly_group via assembly relations. In this case, it uses the coordinate system of the assembly.

fkm_evaluation_relations.png

Required relations

XML syntax

Assembly relation

Notch evaluation point

<relation id="175" type="assembly">
	<ref id="113" role="assembly" hint="shaft_shoulder"/>
	<ref id="178" role="part" hint="fkm_evaluation_point"/>
</relation>