Mechanical behaviour of thermoplastic composites spot-welded and mechanically fastened joints: A preliminary comparison

Tian Zhao; Genevieve Palardy; Irene Fernandez Villegas; Calvin Rans; Marcias Martinez; Rinze Benedictus

doi:10.1016/j.compositesb.2016.12.028

Mechanical behaviour of thermoplastic composites spot-welded and mechanically fastened joints: A preliminary comparison

Tian Zhao^*, Genevieve Palardy, Irene Fernandez Villegas, Calvin Rans, Marcias Martinez, Rinze Benedictus

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

76 Citations (Scopus)

Abstract

The in-plane and out-of-plane mechanical behaviour of both ultrasonically spot-welded and mechanically fastened joints was investigated by double-lap shear and pull-through tests, respectively. Spot-welded specimens showed comparable onset failure load and significantly higher joint stiffness compared to mechanical fasteners when carrying shear load. The failure modes and the damage within specimens were analysed after mechanical tests. Intralaminar failure and very limited damage on the out-most ply were found for welded specimens, whereas catastrophic through-the-thickness failure was observed for mechanically fastened joints. Based on the experimental outcomes, the mechanical performance and failure mechanisms of spot-welded joints were critically assessed in comparison to the mechanical fasteners.

Original language	English
Pages (from-to)	224-234
Number of pages	11
Journal	Composites Part B: Engineering
Volume	112
DOIs	https://doi.org/10.1016/j.compositesb.2016.12.028
Publication status	Published - 1 Mar 2017
Externally published	Yes

Keywords

Fractography
Joints/joining
Mechanical properties
Thermoplastic resin

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10.1016/j.compositesb.2016.12.028

Cite this

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title = "Mechanical behaviour of thermoplastic composites spot-welded and mechanically fastened joints: A preliminary comparison",

abstract = "The in-plane and out-of-plane mechanical behaviour of both ultrasonically spot-welded and mechanically fastened joints was investigated by double-lap shear and pull-through tests, respectively. Spot-welded specimens showed comparable onset failure load and significantly higher joint stiffness compared to mechanical fasteners when carrying shear load. The failure modes and the damage within specimens were analysed after mechanical tests. Intralaminar failure and very limited damage on the out-most ply were found for welded specimens, whereas catastrophic through-the-thickness failure was observed for mechanically fastened joints. Based on the experimental outcomes, the mechanical performance and failure mechanisms of spot-welded joints were critically assessed in comparison to the mechanical fasteners.",

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AU - Zhao, Tian

AU - Palardy, Genevieve

AU - Villegas, Irene Fernandez

AU - Rans, Calvin

AU - Martinez, Marcias

AU - Benedictus, Rinze

PY - 2017/3/1

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N2 - The in-plane and out-of-plane mechanical behaviour of both ultrasonically spot-welded and mechanically fastened joints was investigated by double-lap shear and pull-through tests, respectively. Spot-welded specimens showed comparable onset failure load and significantly higher joint stiffness compared to mechanical fasteners when carrying shear load. The failure modes and the damage within specimens were analysed after mechanical tests. Intralaminar failure and very limited damage on the out-most ply were found for welded specimens, whereas catastrophic through-the-thickness failure was observed for mechanically fastened joints. Based on the experimental outcomes, the mechanical performance and failure mechanisms of spot-welded joints were critically assessed in comparison to the mechanical fasteners.

AB - The in-plane and out-of-plane mechanical behaviour of both ultrasonically spot-welded and mechanically fastened joints was investigated by double-lap shear and pull-through tests, respectively. Spot-welded specimens showed comparable onset failure load and significantly higher joint stiffness compared to mechanical fasteners when carrying shear load. The failure modes and the damage within specimens were analysed after mechanical tests. Intralaminar failure and very limited damage on the out-most ply were found for welded specimens, whereas catastrophic through-the-thickness failure was observed for mechanically fastened joints. Based on the experimental outcomes, the mechanical performance and failure mechanisms of spot-welded joints were critically assessed in comparison to the mechanical fasteners.

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Mechanical behaviour of thermoplastic composites spot-welded and mechanically fastened joints: A preliminary comparison

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Keywords

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