On a higher order analysis of laminated composite strips with extension-twist coupling

A _nite displacement analysis for extension!twist coupling in pretwisted laminated composite strips is presented[ A new formulation of the kinematics is constructed by neglecting the terms of order of the square of the maximum strain magnitude in the strain displacement relations[ The closed!form extension!twist relationships are derived and the in~uence of out!of!plane shear strains on the results is estimated[ The accuracy of the model is assessed through comparison with test data and analytical predictions