Strain Energy Density Settings

After inserting strain energy density, its parameter for fatigue life prediction have to be set. Select the item of the strain energy density in the explorer to edit its options in the property window. The name, unit and comment can be changed.

• Total Crack Length

  This is total length of the part, which will be crack totally to be damage. That means, that the part will be failure after this length by the crack propagation has been totally reached.

   

• Crack Initiation Factor

  The crack initiation process is defined by the formula:

  Crack Initiation = Crack Factor*Power(Strain Energy Density, Crack Exponent)

  This parameter is the crack factor of the formula being validated by experiment data.

   

• Crack Initiation Exponent

  The crack initiation process is defined by the formula:

  Crack Initiation = Crack Factor*Power(Strain Energy Density, Crack Exponent)

  This parameter is the crack exponent of the formula being validated by experiment data.

   

• Crack Growth Factor

  The crack growth rate for a cycle is defined by the formula:

  Crack Growth Rate= Growth Factor*Power(Strain Energy Density, Growth Exponent)

  This parameter is the growth factor of the formula being validated by experiment data.

   

• Crack Growth Exponent

  The crack growth rate for a cycle is defined by the formula:

  Crack Growth Rate= Growth Factor*Power(Strain Energy Density, Growth Exponent)

  This parameter is the growth exponent of the formula being validated by experiment data.

   

• Weibull Shape Factor

  The cumulative failure probability density for the fatigue life is characterized by the Weibull distribution. This parameter is the shape factor for the Weibull distribution being validated by experiment data, which indicates the amount of scatter in the data.