FKM Classification Parameters (Non-Welded)

The parameters for non-welded calculations are listed in both the Assign Material tab and the My Material tab of the Assign Material dialog.

The defaults are with respect to material = steel.

The following are the parameters listed in Assign Material tab.

The following are the parameters listed in My Material tab.

Formulation

Current support in the evaluation build is for steel only.

Cyclic degree of utilization for normal and shear stresses:

Assessment

[ Stress amplitude / (critical amplitude/total safety factor)]

$aBKx=\sigma ax/\left(\sigma BKx/jD\right)\le 1,$
                        
$aBKy=\sigma ay/\left(\sigma BKy/jD\right)\le 1,$
                            
$aBKxy=Taxy/\left(TBKxy/jD\right)\le 1,$
                            

Master Assessment Calculation

$a_{NH}=\frac{1}{2}·\left(\left|a_{BK,x}+a_{BK,y}\right|+\sqrt{{(a_{BK,x}-a_{BK,y})}^2+4·a_{BK,\tau }{}^2}\right)$

$a_{GH}=\sqrt{a_{BK,x}^2+a_{BK,y}^2-a_{BK,x}·a_{BK,y}+a_{BK,\tau }^2}$

$a_{BK,\sigma v}=q·a_{NH}+\left(1-q\right)·a_{GH}\le 1$