Model Configuration

Three configurations are supported:
  • SN – Stress Life
  • EN – Strain Life
  • FOS- Factor of Safety
A model configuration is defined as follows:
<ModelConfig type="SN" unit="MPa">
  	….
	….
	</ModelConfig>
Table 1. <ModelConfig> Attributes
Attribute Valid Values Comment
type SN, EN, FOS Mandatory
unit MPa, ksi, psi Mandatory

SN - Stress Life

The following child tags are supported under <ModelConfig> when type=”SN”. All elements are mandatory.
Element Tag Valid Values
<method> Uni Axial Muli Axial
<stresscombination> "Abs Max Principal"

"Max Principal"

"Signed von"

"Critical Plane"

"Signed Max Shear"

 NA
<survivalfactor> 0 < Value < 1.0 0 < Value < 1.0
<noOfPlanes> NA 7 < Value < 93
<correction> "GOODMAN"

"GERBER"

"GERBER2"

"SODERBERG"

"FKM"

"NONE"

 NA
<sheardamage> NA "FINDLEY"

"NONE"
<tensiondamage> NA "GOODMAN"

"FKM"

"NONE"
<layer> "Top"

"Bottom"

"Worst"

 "Top"

"Bottom"

"Worst"
<typeofloading> "Time Series"

"Transient Response"

"Modal Superposition"

"Random (PSD Stresses)"

"Random (Input PSD with FRF)"

"Sine Sweep"

 "Time Series"

"Transient Response"

"Modal Superposition"

EN - Strain Life

The following child tags are supported under <ModelConfig> when type=”EN”. All elements are mandatory.
Element Tag Valid Values
<method> Uni Axial Muli Axial
<stresscombination> "Abs Max Principal"

"Max Principal"

"Signed von"

"Critical Plane"

"Signed Max Shear"

 NA
<survivalfactor> 0 < Value < 1.0 0 < Value < 1.0
<noOfPlanes> NA 7 < Value < 93
<correction> "GOODMAN"

"GERBER"

"GERBER2"

"SODERBERG"

"FKM"

"NONE"

 NA
<sheardamage> NA "FINDLEY"

"NONE"
<correction> "SWT"

"MORROW"

"MORROW2"

"NONE"

 NA
<tensiondamage> NA "SWT"

"MORROW"

"NONE"
<sheardamage> NA "FS"

"BM"

"NONE"
<plasticcorrection> "NEUBER"

"NONE"

 NA
<layer> "Top"

"Bottom"

"Worst"

 "Top"

"Bottom"

"Worst"
<typeofloading> "Time Series"

"Transient Response"

"Modal Superposition"

"Random (PSD Stresses)"

"Random (Input PSD with FRF)"

"Sine Sweep"

 "Time Series"

"Transient Response"

"Modal Superposition"
<resultinput> "STRESS"

"STRAIN"

 NA

SN and EN Vibration Fatigue Analysis

Supported vibration fatigue analysis for SN and EN.

Random (PSD Stress)

Random (PSD Stress) analysis is specified as:
<typeofloading> Random (PSD Stresses)</typeofloading>
Element Tag Valid Values
<damagemodel>

"DIRLIK"

"LALANNE"

"NARROW"

"THREE"
<srupperlimitoption>

"Calculated"

"User Input"
<facsrend> 0.0 < Value
<srwidthoption>

"Calculated"

"User Input"
<nbin> 0 < Value

Random (Input PSD with FRF)

Random (Input PSD with FRF) analysis is specified as:
<typeofloading>Random (Input PSD with FRF)</typeofloading>
Element Tag Valid Values
<damagemodel>

"DIRLIK"

"LALANNE"

"NARROW"

"THREE"
<srupperlimitoption>

"Calculated"

"User Input"
<facsrend> 0.0 < Value
<srwidthoption>

"Calculated"

"User Input"
<nbin> 0 < Value

Sine Sweep

Sine sweep analysis is specified as:
<typeofloading>Sine Sweep</typeofloading>
Element Tag Valid Values
<freqinputformat> "User Input"

"All Frequencies"

"Frequency Increment"
<freqinputvalue> Valid value

FOS - Factor of Safety

The following child tags are supported under <ModelConfig> when type=”FOS”. All elements are mandatory.
Element Tag Valid Values
<method> "DANGVAN"
<typeofloading> "Time Series"

"Transient"