Strength analysis on hybrid welding interface of polymer and short carbon fiber reinforced composite

Strength analysis on hybrid welding interface of polymer and short carbon fiber reinforced composite

Thermal welding is commonly used in polymer composite pipeline, and the strength of the polymer welding joint remains a weak link. Short carbon fiber (SCF) is used to reinforce polymer welding joint, where a hybrid welding interface between SCF-reinforced polymer composite and polymer is introduced....

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Bibliographic Details
Published in:Journal of materials science Vol. 56; no. 26; pp. 14556 - 14569
Main Authors: Shi, Jianfeng, Yao, Riwu, Kong, Zhiyong, Ni, Fengyao, Zheng, Jinyang
Format: Journal Article
Language:English
Published: New York Springer US 01-09-2021
Springer
Springer Nature B.V
Subjects:
Carbon fiber reinforced plastics
Carbon fibers
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Composites & Nanocomposites
Crystallography and Scattering Methods
Digital imaging
Dissimilar material joining
Dissimilar materials
Failure analysis
Failure surface
Fiber composites
Fiber reinforced polymers
Materials Science
Orientation effects
Peel strength
Peel tests
Polymer industry
Polymer matrix composites
Polymer Sciences
Polymers
Shear
Solid Mechanics
Strain distribution
Welded joints
Welding
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Summary:Thermal welding is commonly used in polymer composite pipeline, and the strength of the polymer welding joint remains a weak link. Short carbon fiber (SCF) is used to reinforce polymer welding joint, where a hybrid welding interface between SCF-reinforced polymer composite and polymer is introduced. The hybrid welding interface involves joining of dissimilar materials, and there is a lack of understanding about the strength of the composite–polymer welding interface. In this study, shear and peel tests were conducted to evaluate the strength of the hybrid welding interface. Strain distribution around welding interface during testing was measured by digital image correlation, and the failure surfaces were analyzed by microscope observation. The results showed that both shear and peel strength of the hybrid welding interface were improved due to the bridging effect of SCF on the hybrid welding interface. However, it was also found that the SCF near the welding interface tended to orientate parallel to the welding interface after welding, and the welding-induced orientation limited the strengthening effect of SCF. The hybrid welding interface had larger shear rigidity, which led to a more even strain distribution, and could bear larger shear load comparing to pure polymer welding interface.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-021-06207-3