Table 4 Failure criteria and degradation character according to Sun et al. (2013)
From: Modelling of Damage Evolution in Braided Composites: Recent Developments
Failure | Criteria | Degradation |
|---|---|---|
Tension along 1-direction | \( {\sigma}_{11}^T>{X}_T; CD{A}_1> CDA \) | E 11 = 0, G 12 = 0, G 13 = 0 |
Compression along 1-direction | \( {\sigma}_{11}^C<{X}_C \) | E 11 = 0.95 E 11, \( {\sigma}_{11}^C={X}_C \) |
Tension along 2-direction | \( {\sigma}_{22}^T>{Y}_T \) | E 22 = 0, G 12 = 0, G 13 = 0 |
Compression along 2-direction | \( {\sigma}_{22}^C<{Y}_C \) | \( {\sigma}_{22}^C={Y}_C \) |
Tension along 3-direction | \( {\sigma}_{33}^T>{Y}_T \) | E 33 = 0, G 13 = 0, G 23 = 0 |
Compression along 3-direction | \( {\sigma}_{33}^C<{Y}_C \) | \( {\sigma}_{33}^C={Y}_C \) |
Shear in 2–3 plane | \( {\sigma}_{23}^S>{SS}_{23} \) | G 23 = 0 |
Shear in 1–2 plane | \( {\sigma}_{12}^S>{SS}_{12} \) | G 12 = 0 |
Shear in 1–3 plane | \( {\sigma}_{13}^S>{SS}_{13} \) | G 13 = 0 |