Table 2 Definition of damage variables in Warren et al. (2016)
From: Modelling of Damage Evolution in Braided Composites: Recent Developments
Damage mode | Damage variable value |
|---|---|
Pure matrix phase | d m  = 0.9 |
Longitudinal damage (fibre) | \( {d}_1=\left\{\begin{array}{cc}\hfill 0.93\hfill & \hfill \mathrm{tesnion}\hfill \\ {}\hfill 0.8\hfill & \hfill\ \mathrm{compression}\hfill \end{array}\right. \) |
Transverse damage (matrix) | \( {d}_1=\left\{\begin{array}{cc}\hfill 0.86\hfill & \hfill \mathrm{tesnion}\hfill \\ {}\hfill 0.6\hfill & \hfill\ \mathrm{compression}\hfill \end{array}\right. \) |
Longitudinal shear (combined) | d 3 = 1 − (1 − d 1)(1 − d 2) |
Transverse shear (combined) | d 4 = d 3 |