Required material properties for specialist durability analysis

Durability properties are a class of material properties that are necessary for durability analysis. The following table lists the durability material properties required for stress life and strain life analysis templates. Blank cells indicate that the durability property is not used.

All properties are located on the Durability page in the Isotropic Material dialog box, except for the Young's Modulus (E) and Poisson's Ratio (NU) properties, which are located on the Mechanical page, and the Max Stress Tension (ST) and Max Stress Compression (SC) properties, which are located on the Strength page.

Note:

The temperature dependent material properties, which you define on the Durability page of the Isotropic Material dialog box, must have a consistent temperature field. For example, if you use table fields to define how Fatigue Strength Coefficient, Fatigue Ductility Exponent, and Cyclic Strain Hardening Exponent vary with temperature, you must enter the tabular data for the same temperature points in all the three table fields.

Durability material property	Stress life analysis template	Strain life analysis template
Young’s Modulus		✓
Poisson’s Ratio		✓
Max Stress Tension (ST) NOTE	✓	✓
Max Stress Compression (SC)NOTE	✓	✓
Stress-Life Data Fatigue Life-Stress FieldNOTE	✓
Stress-Life Data slope filed NOTE	✓
Stress AmplitudeNOTE	✓
Fatigue LifeNOTE	✓
Fatigue Strength CoefficientNOTE	✓	✓
Fatigue Strength ExponentNOTE	✓	✓
Fatigue Ductility CoefficientNOTE		✓
Fatigue Ductility ExponentNOTE		✓
Cyclic Strength Coefficient		✓
Cyclic Strain Hardening Exponent		✓
R-Ratio	✓	✓
Survival Probability	✓	✓
Tsigma (90/10)	✓	✓
Endurance LimitNOTE	✓NOTE	✓

Note:

The specialist durability material database is in the [software_installation_path]\simulation\durspecialist\matlib directory.

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Convert LMS Virtual.Lab durability material files to Simcenter 3D material XML files

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Required material properties for specialist durability analysis, Simcenter 3D 2021.1 Series

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Ultimate tensile strength

Ultimate compression strength

Available when

Stress-Life Data

is set to

Fatigue Life-Stress Field

. The field defines fatigue life versus stress amplitude.

Available when

Stress-Life Data

is set to

Slope Field

. The field specifies the stress amplitude versus the inverse slope of the SN-curve. (for more information refer to

Defining SN-curves

.)

Stress amplitude computed at endurance limit.

Fatigue life computed at endurance limit.

Available when

Stress-Life Data

is set to

Coefficients

.

Available when

Stress-Life Data

is set to

Coefficients

.

Available when

Strain-Life Data

is set to

Coefficients

.

Available when

Strain-Life Data

is set to

Coefficients

.

When one of the number of cycles, the endurance stress amplitude, or the endurance strain amplitude data is known, the other two are calculated using the Ramberg-Osgood and the Manson-Coffin-Morrow methods.

For stress-Life analysis,

Endurance Limit

data is only required when

Stress-Life Data

is set to

Coefficients

.

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