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碳纳米管增强碳纤维增强塑料在不同温度和加载速率下的I型和II型层间断裂韧性表征

Characterization of Mode I and Mode II Interlaminar Fracture Toughness in CNT-Enhanced CFRP under Various Temperature and Loading Rates.

作者信息

Yenigun Burak, Chaudhry Muhammad Salman, Gkouti Elli, Czekanski Aleksander

机构信息

Department of Mechanical Engineering, York University, Toronto, ON M3J 1P3, Canada.

出版信息

Nanomaterials (Basel). 2023 May 25;13(11):1729. doi: 10.3390/nano13111729.

DOI:10.3390/nano13111729
PMID:37299632
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10254139/
Abstract

This study investigates the influence of temperature and loading rate on the Mode I and Mode II interlaminar fracture behavior of carbon-nanotubes-enhanced carbon-fiber-reinforced polymer (CNT-CFRP). CNT-induced toughening of the epoxy matrix is characterized by producing CFRP with varying loading of CNT areal density. CNT-CFRP samples were subjected to varying loading rates and testing temperatures. Fracture surfaces of CNT-CFRP were analyzed using scanning electron microscopy (SEM) imaging. Mode I and Mode II interlaminar fracture toughness increased with increasing amount of CNT to an optimum value of 1 g/m, then decreased at higher CNT amounts. Moreover, it was found that CNT-CFRP fracture toughness increased linearly with the loading rate in Mode I and Mode II. On the other hand, different responses to changing temperature were observed; Mode I fracture toughness increased when elevating the temperature, while Mode II fracture toughness increased with increasing up to room temperature and decreased at higher temperatures.

摘要

本研究调查了温度和加载速率对碳纳米管增强碳纤维增强聚合物（CNT-CFRP）的I型和II型层间断裂行为的影响。通过制备具有不同碳纳米管面密度负载的CFRP来表征碳纳米管对环氧树脂基体的增韧作用。对CNT-CFRP样品施加不同的加载速率和测试温度。使用扫描电子显微镜（SEM）成像分析CNT-CFRP的断裂表面。I型和II型层间断裂韧性随着碳纳米管含量的增加而增加，直至达到1 g/m的最佳值，然后在更高的碳纳米管含量下降低。此外，发现CNT-CFRP的断裂韧性在I型和II型中随加载速率线性增加。另一方面，观察到对温度变化的不同响应；升高温度时I型断裂韧性增加，而II型断裂韧性在温度升高至室温时增加，在更高温度下降低。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dcab/10254139/81b209319f18/nanomaterials-13-01729-g018.jpg
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