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Evaluation of Interfacial Fracture Toughness and Interfacial Shear Strength of Typha Spp. Fiber/Polymer Composite by Double Shear Test Method

1
Department of Mechanical Engineering Syiah Kuala University, Darussalam, Banda Aceh 23111, Indonesia
2
Department of Mechanical Engineering Kobe University, 1-1, Rokkodai, Nada, Kobe 657-8501, Japan
3
School of Industrial Technology, University Sains Malaysia, Penang 11800, Malaysia
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(14), 2225; https://doi.org/10.3390/ma12142225
Received: 20 May 2019 / Revised: 24 June 2019 / Accepted: 2 July 2019 / Published: 10 July 2019
(This article belongs to the Section Advanced Composites)
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Abstract

The aim of this paper is to evaluate the Mode II interfacial fracture toughness and interfacial shear strength of Typha spp. fiber/PLLA and Typha spp. 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 Typha spp. fiber can make the fiber surface coarser, thus increasing the value of interfacial fracture toughness and interfacial shear strength. Typha spp. fiber/epoxy has a higher interfacial fracture value than that of Typha spp. fiber/PLLA. Interfacial fracture toughness on Typha spp. fiber/PLLA and Typha spp. 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. View Full-Text
Keywords: Typha spp. fiber; surface treatment; interfacial fracture; interfacial shear Typha spp. fiber; surface treatment; interfacial fracture; interfacial shear
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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MDPI and ACS Style

Ikramullah; Rizal, S.; Nakai, Y.; Shiozawa, D.; Khalil, H.A.; Huzni, S.; Thalib, S. Evaluation of Interfacial Fracture Toughness and Interfacial Shear Strength of Typha Spp. Fiber/Polymer Composite by Double Shear Test Method. Materials 2019, 12, 2225.

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