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Experimental investigation of CFRP-AA structures joined by ultrasonic additive manufacturing (UAM) and resistance spot welding (RSW)

2023; Elsevier BV; Volume: 260; Linguagem: Inglês

10.1016/j.compositesb.2023.110768

1879-1069

Hongqi Guo, M. Bryant Gingerich, Leon M. Headings, Ryan Hahnlen, Marcelo J. Dapino,

Material Properties and Applications

Implementation of carbon fiber reinforced polymer (CFRP) composites in vehicle structures requires improved CFRP-metal joints. Aluminum alloy (AA) is joined to CFRP using ultrasonic additive manufacturing (UAM). To quantify the mechanical performance of UAM CFRP-AA joints, top-hat and double-hat CFRP-AA hybrid structures are prepared by joining aluminum flanges of CFRP hat sections to AA sheet or to another CFRP hat using resistance spot welding (RSW). Top-hat structures are tested in four-point bending; double-hat structures are tested in dynamic axial crush and quasi-static torsion. The structures with UAM CFRP-AA joints achieve higher energy absorption efficiency than the benchmark in all test modalities.