Advanced mechanical characterization of friction stir welds made on polycarbonate

Lambiase, F.; Grossi, V.; Paoletti, A.

doi:10.1007/s00170-019-04006-4

Cited by 15 publications

(9 citation statements)

References 39 publications

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“…Figure 8 shows the method of sample preparation for mechanical testing of LFSWed polymers. Strain changes during the tensile test can be monitored by digital image correlation (DIC) analysis [34]. Lambiase et al [34] used DIC analysis to show the strain development during tensile tests of FSWed PC sample (Figure 9).…”

Section: Morphology Of the Welds And Quality Assessmentmentioning

confidence: 99%

“…In LFSW the extruded polymer is substituted with the stirred material that is highly pasty and must fulfill the weld seam. This is done by the tool Strain changes during the tensile test can be monitored by digital image correlation (DIC) analysis [34]. Lambiase et al [34] used DIC analysis to show the strain development during tensile tests of FSWed PC sample (Figure 9).…”

Section: Morphology Of the Welds And Quality Assessmentmentioning

confidence: 99%

“…This is done by the tool Strain changes during the tensile test can be monitored by digital image correlation (DIC) analysis [34]. Lambiase et al [34] used DIC analysis to show the strain development during tensile tests of FSWed PC sample (Figure 9). They analyzed samples were FSWed with various tool velocities, and found that at the beginning of the tensile test the strain localized in the region corresponding to the contact with the tool shoulder corner.…”

Section: Morphology Of the Welds And Quality Assessmentmentioning

confidence: 99%

Section: Morphology Of the Welds And Quality Assessmentmentioning

confidence: 99%

“…The morphology of the stirred region (shape, dimension and presence of cavities), the adhesion of the stirred region to the surrounding walls, as well as the thermal shrinkage determine the mechanical behavior of the welds. Lambiase et al [34] collected three main failure modes developing during tensile tests of welds made by FSW, namely:  Adhesive failure: detachment of the stirred region from the side walls. This failure mode mainly developed due to low temperature and hydrostatic stress developed during the process;  Cohesive failure: failure developing from the weld seam due to the presence of defects such as tunneling and/or porosities;  Stress concentration: due to the material removal from the upper weld surface due to adhesion of the material to the bottom surface of the tool shoulder, which exerted a milling action.…”

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confidence: 99%

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Friction Stir Welding and Friction Spot Stir Welding Processes of Polymers—State of the Art

2020

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In the last decade, the friction stir welding of polymers has been increasingly investigated by the means of more and more sophisticated approaches. Since the early studies, which were aimed at proving the feasibility of the process for polymers and identifying suitable processing windows, great improvements have been achieved. This owes to the increasing care of academic researchers and industrial demands. These improvements have their roots in the promising results from pioneer studies; however, they are also the fruits of the adoption of more comprehensive approaches and the multidisciplinary analyses of results. The introduction of instrumented machines has enabled the online measurement of processing loads and temperature, and critical understanding of the principal aspects affecting the material flow and welds quality. Such improvements are also clearly demonstrated by the increase of the strength of recent joints (up to 99% of joining efficiency) as compared to those reached in early researches (almost 47%). This article provides a comprehensive review of the recent progresses on the process fundamentals, quality assessment and the influence of process parameters on the mechanical behavior. In addition, emphasis is given to new developments and future perspectives.

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Section: Morphology Of the Welds And Quality Assessmentmentioning

confidence: 99%

Section: Morphology Of the Welds And Quality Assessmentmentioning

confidence: 99%