Understanding cyclic stress-strain behavior

The cyclic stress-strain curve is used to define the material behavior of structures subjected to cyclic loading. The durability solver uses cyclic stress-strain curves to convert the amplitudes of stress cycles to and from the amplitudes of the strain cycles for durability evaluations whit a notch factor.

For example, if you want to perform stress life fatigue calculation on a finite element (FE) stress history with a notch (stress concentration) factor, the software needs to convert all identified stress cycles into strain cycles to include the local plastic strains in the fatigue model.

The durability solver allows the following cyclic stress-strain models:

• Linear

• Power hardening

• Ramberg-Osgood

	Ramberg-Osgood model
Power hardening model
Linear model
Monotonic curve
Cyclic yield
Monotonic yield

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Static events

Transient events

Durability damage evaluation

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Ramberg-Osgood model

Power hardening model

Linear model

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Understanding cyclic stress-strain behavior, Simcenter 3D 2021.1 Series

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