The required dimensions for the design of shafts and axes with full circular cross-section will be estimated with
an approximate calculation. It is assumed that the main load is well-known.
‘The permissible nominal torsional stress is set so low that the neglected bending stress will be considered as well as increasing stresses due to impact forces (external forces), notches, cross-sections, etc. The basis for the design of axes under bending stress is the nominal stress’ (from Niemann 2001, 3. Edition, p. 741).
The material can be selected for the calculation from the database. It is also possible to use individual material by the default of the maximum permissible torsion and bending tension.
For the calculation the material can be selected from the following listbox.
In case you cannot find the material you are looking for in our extensive database, simply define your individual material. You will find the entry ‘User-defined’ in the listbox. If you select this option, the input fields will be enabled, so that you can enter your own input values.
Every material has a material number. With the material selection, the material number is displayed automtically. If you have specified an user-defined material, then ‘0.0000’ appears in the listbox ‘Material number’.
Four different load types are available for the calculation:
After the input of the load - bending and torsion load or both - as well as the desired safety factor, the required minimum diameter of the axle or shaft is determined.
Clicking the link ‘More calculation modules’ leads you to our web site. Here you can register for a free test account in order to use all eAssistant calculation modules (e.g., shafts, cylindrical gears, bevel gears, springs). Find more information in section 2 ‘Registration’).
Please Note: If you registrate for the first time, you will receive a password in order to login. The project management helps you to start the calculation modules. The list on the left side shows all calculation modules including the free modules. If you use these modules, then no time will be deducted from your account.
Our manual is improved continually. Of course we are always interested in your opinion, so we would like to know what you think. We appreciate your feedback and we are looking for ideas, suggestions or criticism. If you have anything to say or if you have any questions, please let us know via telephone +49 (0) 531 129 399-0 or email www.eAssistant.eu.