Abstract
AbstractThe fatigue behavior and fracture toughness of injection molded short‐glass‐fiber‐reinforced poly(vinyl chloride) (sgfr‐PVC) were investigated using the Crack Layer approach and fractography, Fatigue crack propagation (FCP) experiments in single‐edge‐notched (SEN) specimens were conducted concurrently with microscopic observations. Fracture was observed to propagate as a main crack surrounded by a layer of damage. The magnitude of damage was controlled by the content of glass fiber, which in turn controlled crack reduced acceleration and fracture toughness. FCP behavior was successfully described by the Crack Layer theory, which accounts for the damage associated with crack propagation. In absence of significant interfacial bonding, mechanical fiber/matrix interlocking provided the main resistance to crack propagation. Fiber‐induced matrix deformation and fiber pull‐out appeared to be the dominant energy absorbing mechanisms.
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