Theory | |||
---|---|---|---|
FKM stands for mathematical proof of strength of machine components. The guideline was based on former TGL standards, the earlier guideline VDI 2226 and other sources and further developed to the new level of knowledge. The guideline is a calculation algorithm consisting of instructions, formulas and tables. Represents a general method for calculating the strength of components in mechanical engineering. Area of application of the FKM guideline:
There are 4 calculation tools on our site, that are based on the FKM guideline :
|
Static strength of unwelded components

Stress determination
Normal / shear stresses | |||
---|---|---|---|
σx | [MPa] | ||
σy | [MPa] | ||
σz | [MPa] | ||
τxy | [MPa] | ||
τxz | [MPa] | ||
τyz | [MPa] | ||
Main stresses | |||
σ1 | [MPa] | ||
σ2 | [MPa] | ||
σ3 | [MPa] | ||
Equivalent stress | |||
Equivalent stress1 | σv | - | [MPa] |
Material characteristics | |||
Component standard value of the yield point | Rp | - | [MPa] |
Technological size factor2 | Kd | 1 | [-] |
Short term temperature factor3 | KT | 1 | [-] |
Long term temperature factor4 | KTt | 1 | [-] |
Construction characteristics | |||
Plastic support number5 | npl | 1 | [-] |
Component strength | |||
Static component strength | σSK | - | [MPa] |
Safety factors | |||
Safety factors: applied conservatively | |||
Safety factor6 | j | 2 | [-] |
Proof | |||
Degree of utilization | aSK | - | [%] |
Notes on the factors | |||
---|---|---|---|
|
KONSCHA Simulation GmbH assumes no liability for the correctness, completeness, functionality and topicality of the collection of formulas, calculation programs or their results. The use of the content of the website is at the user's own risk. Liability claims are fundamentally excluded.
We are grateful for any information about any errors or improvements.