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> N/A 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"

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"