AI Article Synopsis
- The paper evaluates the Mode II interfacial fracture toughness and shear strength of fiber/PLLA and fiber/epoxy composites using a double shear stress method with a 3 fibers model.
- Alkali treatment enhances fiber surface roughness, improving the composites' interfacial properties and leading to higher toughness and shear strength for fiber/epoxy compared to fiber/PLLA.
- Factors like matrix length, fiber spacing, fiber diameter, and bonding area impact interfacial fracture characteristics, with longer treatment durations further increasing these properties.
Article Abstract
The aim of this paper is to evaluate the Mode II interfacial fracture toughness and interfacial shear strength of fiber/PLLA and fiber/epoxy composite by using a double shear stress method with 3 fibers model composite. The surface condition of the fiber and crack propagation at the interface between the fiber and the matrix are observed by scanning electron microscope (SEM). Alkali treatment on fiber can make the fiber surface coarser, thus increasing the value of interfacial fracture toughness and interfacial shear strength. fiber/epoxy has a higher interfacial fracture value than that of fiber/PLLA. Interfacial fracture toughness on fiber/PLLA and fiber/epoxy composite model specimens were influenced by the matrix length, fiber spacing, fiber diameter and bonding area. Furthermore, the interfacial fracture toughness and the interfacial fracture shear stress of the composite model increased with the increasing duration of the surface treatment.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6678741 | PMC |
| http://dx.doi.org/10.3390/ma12142225 | DOI Listing |
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