Problem statement: Currently, in order to suppress intermetallic reaction layer formation during dissimilar metals welding between steel/aluminum alloy, only laser beam welding as selfbrazing technique has been applied. However, TIG welding process might be one of welding process candidate for joining dissimilar metals welding between steel/aluminum alloys due to its capability in joining thin section. In the present study, the feasibility of application of TIG welding process in joining dissimilar metals between steel/aluminum alloy was evaluated. Approach: In order to realize the feasibility of TIG welding process, bead on the steel sheet experiment and dissimilar metals welding experiment was carried out. Results: From bead on the steel sheet experimental results, TIG welding could produce the partial penetration welding in 1 mm thickness steel sheet. In dissimilar metals welding experiment, TIG welding process as a self-brazing technique could successfully join dissimilar metal between steel and aluminum alloy. Moreover, the load resistance of bonded zone of dissimilar metals joints was higher than the load resistance of A1100 aluminum alloy after welding. Conclusion: These results indicated that TIG welding process is feasible to be dissimilar metals welding candidate for joining steel/aluminum alloy.

This paper describes about the intensity of stress concentration, and the maximum stress component occurred on the inside liner of a corrugated fiberboard during a rotary creasing process. Three dimensional finite-element analysis, based on the combination of orthotropic-elastic liners and Ring Crush Test based medium, was carried out by varying mechanical conditions such as the working diameter of the main-creaser, the boundary constraint of lateral tensile state and the misalignment of the biting position with an apex of corrugated medium. The simulated stress distribution and deformation shape of inside liner explained about a few experimental features, such as the failure occurrences on the inside liner.

This paper reports on the cutting characteristics of a polycarbonate (PC) sheet stacked on a flexible underlay by a wedge indentation. In order to investigate the effect of underlay stiffness on sheared profile of PC sheet, the stiffness ratio k r in the thickness direction was varied. Indentation of a 42° center bevel blade into a 0.5mm thickness PC sheet that was stacked on the flexible underlay was carried out experimentally and numerically. Deformation profile of wedged PC sheet was observed by a CCD camera in order to reveal the effect of underlay on the cutting performance of the PC sheet. On the experimental works, it was found that the underlay mechanical properties affected the cutting load response and deformation features of the PC sheet. To discuss the effect of underlay stiffness on the deformation profile of the PC sheet, a finite element method (FEM) analysis with elasto-plastic model was conducted. Through the experiment and FEM simulation, it was revealed that the deformation profile of wedged PC sheet was remarkably related to the bent-up angle of the PC sheet, which was mainly caused by sinking and lateral elongation of the underlay. Moreover, in order to obtain a smart profile of the PC sheet, the stiffness ratio k r must be chosen in a suitable range.

This paper aims to reveal the deformation/cutting characteristics of a stacked silicone rubber worksheet subjected to a keen tungsten carbide blade (WC) indentation. Cutting parameters such as blade geometry, feed velocity and hardness of underlay sheet were varied and investigated. It was revealed that: (i) the use of the high feed velocity caused the increase of the 1st inflection, the peak and the breaking points of cutting line force. Also, the positions of these points were postponed when increasing the velocity. (ii) Under the high velocity condition (V = 0.416 mm•s-1), the geometry of the blade such as tip radius and primary height affected the cutting line force and the bending deformation of the worksheet. (iii) The application of soft silicone underlay resulted in the postponement of the crack initiation and the breaking positions of the worksheet. However, the final cut edge of the worksheet was invariant with the underlay hardness. In addition, an finite elementmethod analysis of the process was carried out using a non-linear elastic Mooney-Rivlin material model. The cutting resistance and deformation of the worksheet was numerically simulated up to the peak cutting line force point using an FEM model, before the occurrence of large cracking.

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