Contents Chapter 5: Theory Documentation | 5.3. Failure Analysis | 5.3.4. Failure Criteria for Reinforced Materials | Print page 5.3.4.1. Maximum Strain CriterionIn the maximum strain criterion, the ratios of the actual strains to the failure strains are compared in the ply principal coordinate system. The failure criterion function is written as(5–36)where: « 5.3.4. Failure Criteria for Reinforced Materials 5.3.4.2. Maximum Stress Criterion »