Table 6: First ply failure load and ultimate ply failure load.

Type of lamina Failure criteriaFirst ply failure Ultimate Ply Failure Load (UPFL) MPa Load for 4 mm deflection where such load is less than FPFL MPa
Failure load (FPFL) MPaFailed plyFailed Gauss pointFailed element

ASCPMaximum stress 0.8238118180.05500.1993
Hoffman0.7714L118190.4308
Tsai-Hill0.8177118179.0895L
Tsai-Wu 0.7722218191.8979

SYCPMaximum stress 0.7980118265.7825 0.1870
Hoffman0.7244L218296.7450
Tsai-Hill 0.7922118265.3874L
Tsai-Wu 0.7249218300.7547

ASAPMaximum stress 17.79682159499.8536
Hoffman0.8798111495.2707
Tsai-Hill 0.99871349509.8078
Tsai-Wu 0.8122L111493.5450L

SYAPMaximum stress 25.64081157504.5590
Hoffman1.3737148356.7432
Tsai-Hill 1.51891157418.6368
Tsai-Wu 1.2917L148328.4164L

Note: “L” represents the least failure load obtained from the four failure criteria.