Experimental Analysis on the Fracture Toughness and Fatigue Crack Growth Rate of Carbon Nanotube/Graphene Nanoplatelet/Epoxy Composites

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Project title

Code/計畫編號

MOST105-2221-E019-023

Translated Name/計畫中文名

同時添加碳奈米管及石墨烯微片對環氧樹脂複合材料破裂韌性及疲勞裂縫成長速率影響之實驗與分析

Project Coordinator/計畫主持人

Yi-Ming Jen

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Mechanical and Mechatronic Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=11879477

Year

2016

Start date/計畫起

01-08-2016

Expected Completion/計畫迄

31-07-2017

Bugetid/研究經費

996千元

ResearchField/研究領域

機械工程

本計畫將針對同時添加碳奈米管及石墨烯微片於環氧樹脂基材中之奈米複合材料進行破裂韌性及疲勞裂縫成長行為之實驗與分析，以瞭解此類複合材料在承受靜態及週次負荷下抵抗裂縫開展之能力。在試片準備上，將選定五個碳加強材總重量百分比（0.25、0.50、0.75、1.00、2.00、3.00 wt.%)，並考慮五種碳奈米管及石墨烯微片的重量百分比比例（9:1、7:3、5:5、3:7、1:9)來製作試片，以研究碳加強材不同配置比例對此類奈米複合材料破裂韌性及疲勞裂縫成長行為之影響。研究中疲勞裂縫成長行為將以數學模型來描述實驗量測得到之疲勞裂縫成長速率與裂縫前端應力強度因子範圍間之關係。實驗後試片之破斷面將以掃描式電子顯微鏡進行檢測，以瞭解不同碳加強材配置比例對此類複合材料在靜態及週次負荷下抵抗裂縫開展之機制。研究之成果將與過去文獻中單獨添加單一種碳加強材之奈米複合材料之破裂韌性及疲勞裂縫成長行為結果相比較，以探討添加兩種不同維度的碳加強材與單獨添加一種碳加強材對此類高分子基複合材料抵抗裂縫開展能力之異同性。The fracture toughness and fatigue crack growth behavior of the carbon nanotube (CNT)/graphene nanoplatelet (GNP)/epoxy composites will be experimentally analyzed to study the of the ability of crack extension resistance of studied nano-composites subjected to the static and cyclic loading, respectively. In the experimental program, five contents of the two nano-fillers (0.25、0.50、0.75、1.00、2.00、3.00 wt.%) and five fractional ratios between the CNTs and GNPs (CNT:GNP = 9:1、7:3、5:5、3:7、1:9) will be considered in the preparation of specimens to investigate the effect of the allocation ratios between the two fillers on the fracture toughness and fatigue crack growth behavior of the studied nano-composites. The relationship between the measured fatigue crack propagation rate and the stress intensity factor range at the crack tip will be described using a mathematical model to study the fatigue crack behavior. The fracture surfaces will be examined using a scanning electron microscopy to evaluate the mechanism of crack extension resistance between the studied nano-composites with various allocation ratios between two fillers under static and cyclic loading. The results of the proposed project will also be compared with those of past studies to discuss the difference of the reinforcement mechanism between the polymer-based nano-composites with single and multiple nano-carbon-fillers.

Keyword(s)

碳奈米管
石墨烯微片
環氧樹脂
奈米複合材料
破裂韌性
疲勞裂縫成長速率
應力強度因子
加強機制
carbon nanotube (CNT)
grapheme nanoplatelet (GNP)
epoxy
nano-composite
fracture toughness
fatigue crack propagation rate
stress intensity factor
reinforcement mechanism

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Experimental Analysis on the Fracture Toughness and Fatigue Crack Growth Rate of Carbon Nanotube/Graphene Nanoplatelet/Epoxy Composites

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