The present status of bicomponent fiber crimp frequency analysis is briefly reviewed. In order to develop a generalized model for the prediction of radius of curvature (or crimp frequency) of multi- (or bi-) component fiber, with an arbitrary shape of the cross-section and interfacial curves, the background of compound bars in the literature of classical theory of elasticity is also reviewed. Employing the semi-inverse method of St. Venant, the radius of curvature in the generalized case is derived through the use of the principle of minimum potential energy (see Appendix A). Both the limitations and the usefulness of the results are discussed.
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