Mechanical behaviour of thermoplastic composites spot-welded and mechanically fastened joints

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

Zhao, T. (TU Delft Structural Integrity & Composites)
Palardy, G. (TU Delft Structural Integrity & Composites)
Villegas, I.F. (TU Delft Structural Integrity & Composites)
Rans, C.D. (TU Delft Structural Integrity & Composites)
Martinez, M.J. (Clarkson University)
Benedictus, R. (TU Delft Aerospace Structures & Materials)

Aerospace Structures & Materials

2016

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 .

Thermoplastic resin
Mechanical properties
Fractography
Joints/joining

http://resolver.tudelft.nl/uuid:96cd7d1b-2b49-4762-95ce-54e4d646ff4c

https://doi.org/10.1016/j.compositesb.2016.12.028

2019-01-01

1359-8368

Composites Part B: Engineering, 112 (1), 224-234

Institutional Repository

journal article

© 2016 T. Zhao, G. Palardy, I.F. Villegas, C.D. Rans, M.J. Martinez, R. Benedictus