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252 results on '"dos Santos, J.F."'

40. Friction Riveting (FricRiveting) as a new joining technique in GFRP lightweight bridge construction

Author

Blaga, L., dos Santos, J.F., Bancila, R., and Amancio-Filho, S.T.

Subjects
Bridge construction -- Analysis -- Mechanical properties, Bridges -- Analysis -- Mechanical properties, Building materials -- Analysis -- Mechanical properties, Business, Construction and materials industries
Abstract

ABSTRACT The present work demonstrates the feasibility of the innovative Friction Riveting joining technique on glass fiber reinforced composite/lightweight alloy overlap joints for structural engineering applications. Glass-fiber-reinforced-polymer (GFRP) bridges can [...]

Published
2015
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41. Experimental and Numerical Analysis of Refill Friction Stir Spot Welding of Thin AA7075-T6 Sheets

Author

Janga, V.S.R., Awang, M., Yamin, M.F., Suhuddin, U.F.H., Klusemann, B., and Dos Santos, J.F.

Abstract

The refill friction stir spot welding (refill FSSW) process is a solid-state joining process to produce welds without a keyhole in spot joint configuration. This study presents a thermo-mechanical model of refill FSSW, validated on experimental thermal cycles for thin aluminium sheets of AA7075-T6. The temperatures in the weld centre and outside the welding zone at selected points were recorded using K-type thermocouples for more accurate validation of the thermo-mechanical model. A thermo-mechanical three-dimensional refill FSSW model was built using DEFORM-3D. The temperature results from the refill FSSW numerical model are in good agreement with the experimental results. Three-dimensional material flow during plunging and refilling stages is analysed in detail and compared to experimental microstructure and hardness results. The simulation results obtained from the refill FSSW model correspond well with the experimental results. The developed 3D numerical model is able to predict the thermal cycles, material flow, strain, and strain rates which are key factors for the identification and characterization of zones as well for determining joint quality.

Published
2021

44. Joining of polymers and polymer-metal hybrid structures: recent developments and trends

Author

Amancio-Filho, S.T. and dos Santos, J.F.

Subjects
Metals -- Usage -- Innovations -- Production processes, Degassing of metals -- Usage -- Innovations -- Production processes, Polymers -- Innovations -- Composition -- Production processes -- Usage, Engineering and manufacturing industries, Science and technology, Production processes, Usage, Composition, Innovations
Abstract

The development of new materials and fabrication techniques has become a matter of success for industrial sectors such as transportation. Polymers, polymeric composites, and polymer--metal structures are being increasingly employed in several products mainly due to the associated weight savings. The main joining methods for polymer and polymeric composites are mechanical fastening, adhesive bonding, and welding. On the other hand, polymer--metal structures are more difficult to join by traditional joining methods, mostly due to their strong dissimilar physical-chemical features. Constant efforts on developing improved alternative joining techniques for these hybrid structures, such as the FricRiveting and injection over molding, have contributed to the dissemination of such structures in industrial applications. This work shows that the field of joining of polymers, polymeric composites, and polymer--metal hybrid structures for industrial applications is still a growing research and development area. This is due to the increasing aspirations for more environmental-friendly technologies and lightweight materials. POLYM. ENG. SCI., 49:1461-1476, 2009. [C] 2009 Society of Plastics Engineers, INTRODUCTION Since it has been realized in the early 20th century that steels were strong and tough but heavy and that ceramics were strong but brittle, the efforts in materials [...]

Published
2009

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