Assessment and Modification Strategies for Improved Interlaminar Properties of Advanced FRP Composites: A Review
Keywords:
polymer composites, interlaminar shear strength, fracture toughness, compression after impact, nanofiller, z-pinning, interleavingAbstract
Demand for high strength and high toughness material with a light weight has always been a
matter of concern. The specific properties of FRP composites make it a promising candidate
for various structural applications. In the present article, we highlight the strategies for
obtaining FRP composites with enhanced interlaminar strength and toughness by various
techniques. As strength of FRP composites are mostly limited by interlaminar properties,
various ways to characterize the interfacial mechanical properties are narrated in the
beginning. Further, the ways to modify the matrix and reinforcement phases to obtain high
strength and toughness are discussed. Effect of interleaving phase on mechanical
characteristics is summarized in this article along with the various fiber architecture and
their influences. Most of the strength characterization is discussed on the basis of flexural
strength, interlaminar shear strength or tensile strength while the toughness is characterized
through fracture toughness (stress intensity factor or critical strain energy release rate).
Overall, this discussion gives a broad overview and technical viable routes to obtain a
particular combination of strength and toughness.
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