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Effect of water absorption on the flexural strength of a green sandwich composite

  • Sivalingam Prabhakaran , Vijayan Krishnaraj , Mouleeswaran Senthilkumar , Redouane Zitoune und Krishna Shankar
Veröffentlicht/Copyright: 26. März 2019
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Materials Testing
Aus der Zeitschrift Materials Testing Band 61 Heft 4

Abstract

The main objective of this paper is to study the effect of water absorption on the flexural strength of new green sandwich composite material made of flax as skin reinforcement and agglomerated cork as core. In this work, three different types of skin reinforcements and three different densities of agglomerated cork core have been used for the manufacturing of sandwich composites. The manufactured sandwich composites were subjected to three-point bending tests under both dry and wet conditions. The three-point bending results confirmed a decrease in the specific flexural strength by 14-42 % in wet samples due to water absorption. Also, the increase in core density leads to an increase in flexural strength both in dry and wet conditions. During testing under dry conditions, the specific flexural strength of flax reinforced sandwich composite was found to be superior because of the higher strength to weight ratio factor of flax fiber when compared to a glass reinforced sandwich composite and glass/flax reinforced hybrid sandwich composite. Due to the hydrophilic nature of flax fibers, flax reinforced sandwich composite has a reduced specific flexural strength in wet conditions when compared to glass reinforced sandwich composite and glass/flax reinforced hybrid sandwich composite.

*Correspondence Address, Assistant Prof. Sivalingam Prabhakaran, Department of Robotics & Automation Engineering, K Block (2nd floor), PSG College of Technology, Peelamedu, Coimbatore 641 004, India, E-mail:

Prof. Sivalingam Prabhakaran, born in 1988, received his Master of Engineering in Engineering Design and Bachelor of Engineering in Mechanical Engineering from Bannari Amman Institute of Technology, Erode, India. He completed his Diploma in Design and Drafting at PSG Polytechnic College, Coimbatore, India. He has six years of teaching experience in Mechanical Engineering Stream. He is currently working as Assistant Professor in the Department of Robotics and Automation Engineering at PSG College of Technology, Coimbatore, India. His research interest includes composite structures and mechanical design.

Dr. Vijayan Krishnaraj, born in 1972, received his Bachelor of Engineering in Mechanical Engineering at Coimbatore Institute of Technology, Coimbatore, India in 1994. He completed his Master's degree in Production Engineering at the PSG College of Technology, Coimbatore, India in 1999. He completed his PhD in the area of drilling of composites in 2007 and completed his Post-doctoral Fellowship at the University of Paul Sabatier, Toulouse, France in 2009. Currently, he is working as Associate Professor in the Department of Production Engineering, PSG College of Technology, Coimbatore, India.

Dr. Mouleeswaran Senthil Kumar, born in 1973, received his Bachelor of Engineering in Mechanical Engineering from VLB Janakiammal College of Engineering and Technology, Coimbatore, India in 1994. He completed his Master's degree in Engineering Design at the Government College of Technology, Coimbatore, India in 1996. He completed his PhD in the area of passive and active suspension systems in 2008. He has published more than 125 papers in national and international journals in the area of composites and vibrations. Currently, he is working as Associate Professor in the Department of Production Engineering, PSG College of Technology, Coimbatore, India.

Dr. Redouane Zitoune, born in 1976, has been an Associate Professor in Mechanical Engineering at Paul Sabatier University, Toulouse, France since 2005. His PhD work focused on the machining (drilling and milling) of composites materials. His current research interests include damage analysis during drilling and milling of composites materials – with conventional machining and abrasive water jet machining.

Dr. Krishna Shankar is currently working as Professor at the University of New South Wales (UNSW), Canberra, Australia. He has nineteen years of teaching experience at UNSW Canberra, four years of aircraft design experience as stress analyst in the Design Bureau, HAL, India and six years of post-doctoral research experience at the University of Toronto, Canada and National Research Council of Canada in Composite structural analysis and testing. His research interests are aerospace materials, dynamics, vibration and vibration control.

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Published Online: 2019-03-26
Published in Print: 2019-04-04

© 2019, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. StressLifetc – NDT-related assessment of the fatigue life of metallic materials
  5. Structural evolution of ceramic coatings by mechanical alloying
  6. Influence of rolling texture on near-threshold crack extension behavior in aluminum alloy EN AW-6082
  7. Influence of variation of energy per unit length on mechanical-technological properties of ultra-high-strength steel 22MnB5 in the laser beam welding process
  8. Comparative study on fatigue behavior between unbonded prestressed and ordinary reinforced reactive powder concrete beams
  9. Quantitative analysis of metal fiber morphology by level set image segmentation algorithms
  10. Mechanical properties of electro and butt fusion welded high-density polyethylene pipes
  11. Effects of ultrasonic welding parameters for solar collector applications
  12. Mechanical strength of single-lap joints bonded with nano graphene and MWCNT reinforced epoxy-based nanocomposite adhesives
  13. Optimum spatial variable blank holder forces determined by the sequential response surface method (SRSM) and a hybrid algorithm
  14. Experimental study on gas emission from coal mass with a rich microstructure
  15. Effect of water absorption on the flexural strength of a green sandwich composite
  16. Wavelet based pseudo color scaling for optimizing wear behavior of epoxy composites
  17. Damage characteristics of basalt fiber reinforced mortar under compression evaluated by acoustic emission
https://doi.org/10.3139/120.111330

Artikel in diesem Heft

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. StressLifetc – NDT-related assessment of the fatigue life of metallic materials
  5. Structural evolution of ceramic coatings by mechanical alloying
  6. Influence of rolling texture on near-threshold crack extension behavior in aluminum alloy EN AW-6082
  7. Influence of variation of energy per unit length on mechanical-technological properties of ultra-high-strength steel 22MnB5 in the laser beam welding process
  8. Comparative study on fatigue behavior between unbonded prestressed and ordinary reinforced reactive powder concrete beams
  9. Quantitative analysis of metal fiber morphology by level set image segmentation algorithms
  10. Mechanical properties of electro and butt fusion welded high-density polyethylene pipes
  11. Effects of ultrasonic welding parameters for solar collector applications
  12. Mechanical strength of single-lap joints bonded with nano graphene and MWCNT reinforced epoxy-based nanocomposite adhesives
  13. Optimum spatial variable blank holder forces determined by the sequential response surface method (SRSM) and a hybrid algorithm
  14. Experimental study on gas emission from coal mass with a rich microstructure
  15. Effect of water absorption on the flexural strength of a green sandwich composite
  16. Wavelet based pseudo color scaling for optimizing wear behavior of epoxy composites
  17. Damage characteristics of basalt fiber reinforced mortar under compression evaluated by acoustic emission
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