Strength of Single Plies

These failure criteria can be applied to single ply composites as illustrated in the following Examples. 

Example 3.19 A single ply Kevlar 49/epoxy composite has the following properties. 

If the fibres are aligned at 15° to the jc-direction, calculate what tensile value of Ox will cause failure according to (i) the Maximum Stress Criterion (ii) the Maximum Strain Criterion and (iii) the Tsai-Hill Criterion. The thickness of the composite is 1 mm. 

a stress of Ox = 1608 MN/m would cause failure in the local 

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