FKM Classification Parameters (NonWelded)
The parameters for nonwelded 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.
Parameter  Description 

Effective Diameter (Deff)  Effective diameter of the semifinished product (default = 7.5mm) 
Anisotropy factor (KA)  Default = 0.9 
Plastic Notch Factor – Nominal (Kp_sigma)  Default = 1 
Plastic Notch Factor – Shear (Kp_tau)  Default = 1 
Relative Stress Gradient X (G_sigmax)  Relative stress gradient in normal direction (Default = 0.1 mm1) 
Relative Stress Gradient Y (G_sigmay)  Relative stress gradient in normal direction (Default = 0.1 mm1) 
Relative Stress Gradient XY (G_sigmaxy)  Relative stress gradient in shear direction (Default = 0.1 mm1) 
Overload Factor (Overloading)  Parameter to decide overload situation. Options: F1, F2, F3, F4. Based on the selection, the fatigue limit calculation formula may vary. (Default – F2) 
Surface Roughness (Rz)  Average roughness of the component surface, (default = 100 μm) 
Surface Treatment Factor (Kv)  Default = 1 
Coating Factor (Ks)  Default = 1 
Temperature Factor (Ktd)  Default = 1 
Material Safety factor (jF)  Material safety factor for nonwelded steel based on regular inspection (default = 1.5) 
Load Safety factor (jS)  Safety factor defined by design loads (default = 1.0) 
Partial safety factor for allowable defects in castings (jG)  Material safety factor for Casted materials (default =1, as just steel is supported) 
Total Safety Factor (jD) 
Total safety factor, based on jF, jS, jD and KT,D , jD = jS . (jF/ KT,D) 
The following are the parameters listed in My Material tab.
Parameter  Description 

Tensile Strength (Rm)  Listed in SN tab (default = 300 N/mm2) 
Yield Strength (Rp)  Listed in SN tab (default = 180 N/mm2) 
Elastic Modulus (E)  Listed in SN tab (default = 2e5 N/mm2) 
Strain At Break Point (A%)  Listed in SN tab (default = 10% or 0.1) 
Normal Fatigue Limit (σ_wzd)  Listed in SN tab (default = 140 N/mm2) 
Shear Fatigue Limit (τ_wzd)  Listed in SN tab (default = 80 N/mm2) 
Number of Cycles at Knee Point, Normal Stress (Nd_σ)  Listed in SN tab (default = 1e6 cycles) 
Number of Cycles at Knee Point, Shear Stress (Nd_τ)  Listed in SN tab (default = 1e6 cycles) 
SN curve slope, Normal Stress (K_σ)  Listed in SN tab (default = 5) 
SN curve slope, Shear Stress (K_τ)  Listed in SN tab (default = 8) 
Fatigue Stress Factor, Fully Reversed, Normal (fw_σ)  Listed in Other tab (default = 0.4) 
Fatigue Stress Factor, Fully Reversed, Shear (fw_τ)  Listed in Other tab (default = 0.577) 
Constant, Technological Size Factor for Tensile Strength (adm)  Listed in Other tab (default = 0.15) 
Constant, Technological Size Factor for Yield Strength (adp)  Listed in Other tab (default = 0.4) 
Constant, Technological Size Factor @ adm (Deff,N,m)  Listed in Other tab (default = 40mm) 
Nonlinear Strain Stress Factor under bending – GJL (KNL)  Listed in Other tab (default = 1.0) 
aG Constant for (KtKf) ratio for Fatigue Strength Factor (aG)  Listed in Other tab (default = 0.4) 
bG Constant for (KtKf) ratio for Fatigue Strength Factor (bG)  Listed in Other tab (default = 2400) 
Constant For Roughness Factor, Normal Stress (aR_σ)  Listed in Other tab (default = 0.22) 
Minimum permissible tensile strength constant (Rm,N,min)  Listed in Other tab (default = 400 N/mm2) 
Constant for Mean Stress Sensitivity (aM)  Listed in Other tab (default = 0.35) 
Constant for Mean Stress Sensitivity (bM)  Listed in Other tab (default = 0.1) 
Compression Strength Factor, for tension, compression (f_σ)  Listed in Other tab (default = 1.0) 
Compression Strength Factor, Shear (f_τ)  Listed in Other tab (default = 1.0) 
Material Parameter Epsilon_0 (Epsilon_0)  Listed in Other tab (default = 0.05) 
Ductility factor (q)  Listed in Other tab (default = 0) 
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

${a}_{NH}=\frac{1}{2}\xb7\left(\left{a}_{BK,x}+{a}_{BK,y}\right+\sqrt{{({a}_{BK,x}{a}_{BK,y})}^{2}+4\xb7{a}_{BK,\tau}{}^{2}}\right)$
${a}_{GH}=\sqrt{{a}_{BK,x}^{2}+{a}_{BK,y}^{2}{a}_{BK,x}\xb7{a}_{BK,y}+{a}_{BK,\tau}^{2}}$
${a}_{BK,\sigma \text{\hspace{0.17em}}v}=q\xb7{a}_{NH}+\left(1q\right)\xb7{a}_{GH}\le 1$