Effect of CNT filler and temperature on fracture toughness of epoxy composites reinforced with carbon fabric

Author:

Kiran M. D.1,Govindaraju H K1,Kumar Nithin2,Nagaral Madeva3,Khankal Dhananjay Vasant4,Pandhare Amar Pradeep4,Babu E. R.5,Anjinappa Chandrashekar6,Razak Abdul7ORCID,Wodajo Anteneh Wogasso8ORCID

Affiliation:

1. Department of Mechanical Engineering BMS Institute of Technology and Management Bangalore India

2. Department of Mechanical Engineering NMAM Institute of Technology, Affiliated to NITTE (Deemed to be University) Mangaluru India

3. Aircraft Research and Design Centre, HAL Bangalore India

4. Department of Mechanical Engineering Sinhgad College of Engineering Pune India

5. Department of Mechanical Engineering Bangalore Institute of Technology Bangalore India

6. Department of Robotics and Artificial intelligence Bangalore Institute of Technology Bangalore India

7. Department of Mechanical Engineering P. A. College of Engineering (Affiliated to Visvesvaraya Technological University, Belagavi) Mangaluru India

8. Department of Automotive Engineering Dilla University Dilla Ethiopia

Abstract

AbstractIn present research the fracture behavior of carbon fabric‐epoxy composites (CE composites) was evaluated with the addition of 0.1, 0.2, 0.5, and 0.75 weight percentages of carbon nano tubes (CNTs) at different temperatures. The CE composites with different wt.% of CNT were fabricated using land layup method and cured by hot pressing. The fracture toughness of fabricated composites was evaluated in mode–I condition at different temperature. From the results it was shown that the highest fracture toughness was observed at 0.75 wt.% of reinforcement of CNT functional fillers. The fracture toughness of 0.75 wt.% CNT filled CE composites was increased by 19.73% compared to unfilled CE composites. The fracture toughness of CNT filled CE composites diminishes with increase in temperature and the composite filled with 0.75 wt.% CNT exhibits better fracture toughness than the unfilled CE composite at all the temperatures. The fracture toughness was improved by 57.76% and 71.65% at 40 and 60°C, respectively, at 0.75 wt.% reinforcement of CNT fillers. The fractured surfaces of composites were analyzed using Scanning Electron Microscope (SEM) to study the filler contribution to enhance the fracture toughness and failure mechanism of composites.

Publisher

Wiley

Subject

General Engineering,General Computer Science

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