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On kink-band propagation in fiber composites. (English) Zbl 0957.74010
Summary: Two kinds of kink-band propagation in the compression of aligned-fiber composites are studied analytically: band broadening in which a uniform kink band grows in the direction of loading at constant stress under increasing deformation; and transverse kink propagation, in which a kink band traverses a specimen quasi-statically under constant overall shortening. The analysis is based on a one-dimensional geometrically nonlinear couple-stress theory of composite kinking, that takes elastic fiber bending resistance into account together with idealized nonlinear stress-strain relations, but assumes non-breaking fibers. Simple results for band-broadening and transverse propagation stresses are deduced, and their significance is discussed.

MSC:
74E30 Composite and mixture properties
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