Durability workflows

The following steps summarize both event-based and function-based durability analyses.

Durability event-based workflow

You must start with a FEM file in which your model is meshed appropriately for a stress analysis. See Supported elements for durability analysis for more information.

Step	Summary	Detailed help topics
1.	Assign fatigue material properties.	The material assigned to the part of the model where you perform the durability analysis must have the appropriate durability and fatigue material properties.If you do not assign fatigue material properties, you can override the referenced material in the Solve Options durability object.	Material properties for durability analysis
2.	Create and solve the structural analysis solution.	The type of structural analysis solution that you create determines the type of events you can create during the durability analysis.Because the results file needs to contain either stress or strain result sets for performing the durability analysis, you must specify either stress or strain results in the output requests.	Supported solvers and solutions for durability analysis
3.	Create the Durability solution process.	A Durability solution process can contain multiple static, transient, and random events.	Create a Durability solution process
4.	Create durability objects.	Durability objects define durability solver settings that the software uses when solving durability events. Because you can reuse durability objects in different durability events, you can define durability solver settings once, and use them in multiple events.	Durability objects
5.	Create events.	Depending on the structural analysis solution, you can create static events, transient events, or random events.For each event, you specify the parent solution, its subcases, and necessary durability objects. You can create and edit durability objects directly in the event dialog boxes.	Create a static durability eventCreate a transient durability eventCreate and solve a random durability event
6.	Solve for durability analysis results.	You can solve each event and the durability solution process separately, or you can solve the durability solution process and all events at the same time.The durability solution process results cumulate damage and life results from all the active static, transient, and random events. Worst case safety factors are taken from all active events.	Solve durability and events
7.	Post process durability analysis results.	You can view the results you requested for each event separately and cumulatively under the durability result node in the Post Processing Navigator.	View durability results

Durability function-based workflow

Step	Summary	Detailed help topics
1.	Load or create AFU functions of stress or strain history.	Because the Evaluate Damage command evaluates stress or strain history functions that are stored in AFU files, you need to have the functions loaded in the XY Function Navigator.To obtain the stress and strain functions, you can:Create the XY table functions using the XY Function Editor command.Import data from external files.Use the Analyze Strain Gage command to obtain the functions from strain gage data.	Manage AFU filesPlot functionsCreate table functionsAnalyze strain gages
2.	Create a fatigue durability object.	The fatigue durability object defines fatigue life criterion and the cyclic stress-strain model for the Evaluate Damage command.	Create a fatigue durability object
3.	Evaluate the durability damage due to the stress or strain history.	The Evaluate Damage command performs cycle counting on multiple stress or strain functions to identify all stress or strain cycles and to calculate the damage due to identified cycles.The fatigue damage results can be stored either in a spreadsheet or a CSV file.You can modify nominal range bin and mean bin definitions. You can also edit or create a fatigue durability object.You must specify the material to which the functions are applied.	Evaluate the durability damage of a stress history

How do I

Define an S-N curve for isotropic materials

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Simcenter 3D Durability

Durability solution process

Durability objects

Static events

Transient events

Random events

Durability results for the event-based analysis

Analyzing strain gage rosette data

Durability damage evaluation

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Simulation Navigator for Durability

Supported elements for durability analysis

Material properties for durability analysis

Supported solvers and solutions for durability analysis

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Durability workflows, Simcenter 3D 2021.1 Series

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