CustomStrainDegradation

Strain History Based Degradation With Custom Rules

This model implements the universal damage model assuming the degradation factor depends on the strain history.

Syntax

material CustomStrainDegradation (1) (2) (3) [4]
# (1) int, unique material tag
# (2) int, host intact material tag
# (3) int, tension degradation expression tag
# [4] int, compression degradation expression tag, default: (3)

Usage

The usage of CustomStrainDegradation is identical to CustomStressDegradation.

The degradations for positive/negative strains are defined separately.

$$D_{pos}=D_{pos}(\varepsilon_{max}),\quad D_{neg}=D_{neg}(\varepsilon_{min}).$$

In which $\varepsilon_{max}$ is the maximum strain (positive) of the whole loading history, and $\varepsilon_{min}$ is the minimum strain (negative) of the whole loading history.