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Assessment of mechanical shear response using digital image correlation
Leitão, Carlos; Loureiro, Altino; Rodrigues, DulceIn this work, a special tool, developed for running shear tests using a universal tensile testing machine is described, as well as the procedures used for strain data acquisition via Digital Image Correlation (DIC). Testing procedures were developed and verified by testing two aluminium alloys widely used in welding construction, the heat-treatable AA6082-T6 and the non-heat-treatable AA5083-H111 aluminium allo...
Welding robots
Pires, J. Norberto; Loureiro, Altino; Godinho, T.; Ferreira, P.; Fernando, B.; Morgado, J.Using robots in industrial welding operations is common but far from being a streamlined technological process. The problems are with the robots, still in their early design stages and difficult to use and program by regular operators; the welding process, which is complex and not really well known and the human-machine interfaces, which are unnatural and not really working. In this article, these problems are ...
Effect of heat input on plastic deformation of undermatched welds
Loureiro, Altino J. R.The aim of this work is to study the tensile properties of undermatch welds carried out in high strength quenched and tempered steel, RQT701 (British Steel). Two different heat inputs were used in order to obtain distinct mechanical properties in the weld metal (WM) and the heat-affected zone (HAZ) of the welds. Attention was focused on the microstructure and mechanical properties of the welded joints. Real str...
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