Mechanic of Advanced and Smart Materials
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Environmental conditions effect on mechanical properties and mode II fracture toughness of composite multilayers with woven fibers glass /vinyl ester

Document Type : Original Article

Authors

Hamidreza Rezaei Ashtiani 1
F Jamshidi 2
Mazaher salamattalab 3

1 Associate Professor of school mechanical engineering- arak university of technology

2 arakut

3 arak university of technology

https://doi.org/10.61186/masm.3.3.380
Abstract
Due to the effect of environmental conditions on the behavior of materials, in this research, the effect of acidic environment on the flexural modulus and fracture toughness of glass fiber/vinyl ester composite multilayers at different temperatures under second mode loading has been investigated. The samples were placed at 25°C and 80 °C for different periods of time in acidic environmental conditions. The experimental results show that different environmental conditions, especially at a temperature of 80 °C, have a significant effect on the behavior of composite samples. The load-displacement diagrams and fracture toughness of the samples have been investigated in different time intervals. The experimental results show that at the temperature of 25°C, the maximum load as well as the interlayer fracture toughness increases at the beginning and then decreases. Also, at around 80 °C, after 250 days, more than 50% of the fracture toughness value was observed. The scanning electron images (SEM) of the mechanisms of damage and crack growth over time showed that fiber breakage and separation of fibers from the resin occur at the fracture surface of the samples.

Keywords

Composite multilayers
Woven fibers
Mode II fracture
Acidic-temperature environment
Viscous zone model
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Mechanic of Advanced and Smart Materials
Volume 3, Issue 3
Autumn 2023
Pages 380-397

  • Receive Date 28 January 2024
  • Revise Date 13 February 2024
  • Accept Date 18 February 2024

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