The present paper deals with the four-point bending of polyvinyl chloride beams reinforced with glass fiber clusters. The clusters, treated as orthotropic materials, were arranged periodically along the longitudinal axis of beams. The load-carrying capacity of the beams was estimated by two methods. In the first method, the beam strength was assessed using the Max-Stress, Max-Strain, Tsai–Wu, Inverse Tsai–Wu, and Hashin failure criteria. In the second one, the anisotropic Hill potential theory was employed to locally decrease the stiffness at any point of the whole structure. An analysis revealed that the Hill theory better described the true behavior of the beams at large deformations. It is also concluded that the toughness at fiber borders affects the total failure load considerably.
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Russian translation published in Mekhanika Kompozitnykh Materialov, Vol. 56, No. 2, pp. 293-310, March-April, 2020.
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Czechowski, L., Gralewski, J. & Kubiak, T. Failure of Polymer Beams Reinforced with Glass Fibers. Mech Compos Mater 56, 195–206 (2020). https://doi.org/10.1007/s11029-020-09872-8
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DOI: https://doi.org/10.1007/s11029-020-09872-8