采用双剪切试验法评估香蒲纤维/聚合物复合材料的界面断裂韧性和界面剪切强度

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

作者信息

Rizal Samsul, Nakai Yoshikazu, Shiozawa Daiki, Khalil H P S Abdul, Huzni Syifaul, Thalib Sulaiman

机构信息

Department of Mechanical Engineering Syiah Kuala University, Darussalam, Banda Aceh 23111, Indonesia.

Department of Mechanical Engineering Kobe University, 1-1, Rokkodai, Nada, Kobe 657-8501, Japan.

出版信息

Materials (Basel). 2019 Jul 10;12(14):2225. doi: 10.3390/ma12142225.

DOI:10.3390/ma12142225

PMID:31295885

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6678741/

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.

摘要

本文旨在通过使用具有三根纤维模型复合材料的双剪应力法，评估纤维/PLLA和纤维/环氧树脂复合材料的II型界面断裂韧性和界面剪切强度。通过扫描电子显微镜（SEM）观察纤维的表面状况以及纤维与基体之间界面处的裂纹扩展情况。对纤维进行碱处理可使纤维表面更粗糙，从而提高界面断裂韧性和界面剪切强度的值。纤维/环氧树脂的界面断裂值高于纤维/PLLA。纤维/PLLA和纤维/环氧树脂复合材料模型试样的界面断裂韧性受基体长度、纤维间距、纤维直径和粘结面积的影响。此外，复合材料模型的界面断裂韧性和界面断裂剪应力随着表面处理时间的增加而增加。