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5.3 EN 12952-3

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If EN 12952-3 is selected in the Fatigue model/code drop-down menu in Project Setup dialog box in 5.1 Data Entry and Project Setup, the EN 12952-3 button  on the toolbar becomes activated. 

 

Choose Input>EN 12952-3 or click EN 12952-3 button.  The EN 12952-3 Input dialog box appears. 

 

 

5.3.1 Selecting Material

 

The user can choose EN material or ASME Sec. II Part D material, or manually enter or modify material properties.

 

 

If EN material is selected, the EN Material group box is activated.

 

 

Select a material database from EN 10216 Seamless tubes, or EN 10217 Welded tubes, or EN 10028 Flat products, or EN 10222 Forgings, or EN 10213 Castings, or EN 10269 Fasteners, or EN 10273 Weldable bars.  Then the Steel Name dropdown menu is activated.  Select a material from the drop-down menu.

 

 

If ASME Sec. II Part D is selected, the ASME Material group box is activated.  Select a material from Spec No. drop-down menu.

 

 

 

If Manually enter or modify radio button is clicked, the Manually enter properties dialog box pops up:

 

 

Enter material name, tensile strength at ambient temperature, yield strength at ambient temperature, and yield strength at reference temperature.  Specify either the steel is feritic or austenitic by check corresponding radio button.  Click OK button to confirm and close the dialog.  To come back and make changes, click Edit button to open the dialog box.

 

5.3.2 Selecting Correction Factor Ck

 

Click Correction factor Ck drop-down menu to select a Ck value according to surface roughness conditions or welding details. 

 

 

The value Ck0 = 1 shall be used for calculating the influence of the surfaces in the non-welded region of a component having roughness depths Rz < 6 μm, such as can be achieved by grinding or machining.

 

Surfaces in the non-welded region with peak-to-valley heights Rz of 6 to 50 μm can be assigned values of Ck0 = 1.3 for Rm = 1000 MPa, and Ck0 = 1,1 for Rm = 400 MPa.  For Rm value between 400 MPa and 1000 MPa, Ck0 value is interpolated.   

 

Click Examples of welded joints button to see examples of welded joints for Configuration Group K1 (Ck1), Configuration Group K2 (Ck2), or Configuration Group K3 (Ck3).

 

 

The selected and entered information are displayed in the information box.

 

 

Click Plot fatigue curve button to plot the fatigue curve for the material selected.  The Fatigue Curve window appears.  You can zoom, print or export the chart, or change the styles of the chart by clicking the buttons on the tool bar.  Click X button on the upper-right corner to close the window.  The following is an example.

 

 

When completed, click OK button to return to the main window.

 

 

 

 

 

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