Flexural behavior of functionally graded polymeric composite beams

Faculty Engineering Year: 2021
Type of Publication: ZU Hosted Pages:
Authors:
Journal: Journal of Industrial Textiles SAGE Volume:
Keywords : Flexural behavior , functionally graded polymeric composite    
Abstract:
The bending test is one of the most important tests that demonstrates the advantages of functional gradient (FGM) materials, thanks to the stress gradient across the specimen depth. In this research, the flexural response of functionally graded polymeric composite material (FGM) is investigated both experimentally and numerically. Fabricated by a hand lay-up manufacturing technique, the unidirectional glass fiber reinforced epoxy composite composed of ten layers is used in the present investigation. A 3-D finite element simulation is used to predict the flexural strength based on Hashin’s failure criterion. To produce ten layers of FGM beams with different patterns, the fiber volume fraction (Vf%) ranges from 10% to 50%. A comparison between FGM beams and conventional composite beams having the same average Vf% is made. The experimental results show that the failure of the FGM beams under three points bending loading (3PB) test is initiated from the tensioned layers, and spread to the upper layer. The spreading is followed by delamination accompanied by shear failures. Finally, the FGM beams fail due to crushing in the compression zone. Furthermore, the delamination failure between the layers has a major effect on the rapidity of the final failure of the FGM beams. The present numerical results show that the gradient pattern of FGM beams is a critical parameter for improving their flexural behavior. Otherwise, Vf% of the outer layers of the FGM beams, i.e. Vf%¼30, 40, or 50%, is responsible for improving their flexural strength.
   
     
 
       

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  • Mahmoud Mohamed Atta Mhmmud, "Effects of composite patching on cyclic crack tip deformation of cracked pinned metallic joints", Taylor & Francis, 2020 More
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  • Mahmoud Mohamed Atta Mhmmud, "Flexural behavior of functionally graded polymeric composite beams", SAGE Publications, 2022 More

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