The influence of fibre length shear lag theory

The factor x (Equation 9.15) depends on two key ratios G, which is typically 

It has been pointed out by Tucker and Liang [11] that to give a result consistent with the self-consistent models, Equation (9.13) should be modified to 

For a further discussion, the reader is referred to the texts by Kelly [13] and Hull and Clyne [14]. 

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