Multiobjective optimization of a two-piece aluminum beverage bottle considering tactile sensation of heat and embossing formability

Volume 6: 33rd Design Automation Conference, Parts a and B

Nishiyama³

et al. 2007

Self Cite

This paper has introduced the finite element analysis (FEA) into the ergonomic design to evaluate the human feelings numerically and objectively, and then into the optimization design of beverage containers considering human factors. In the design of the end of can (the lid of can), experiments and the FEA of indenting vertically the fingertip pulp by a probe and the tab of end have been done to observe force responses and to study feelings in the fingertip. A numerical simulation of finger lifting the tab for opening the can has also been performed, and discomfort in the fingertip has been evaluated numerically to present the fingeraccessibility of the tab. The comparison of finger-accessibility between two kinds of tab ring shape designs showed that the tab that may have a larger contact area with the finger is better. In the design of beverage bottles served hot drinks, the FEA of tactile sensation of heat has been performed to evaluate numerically the touch feeling of the finger when holding the hot bottle. The numerical simulations of embossing process have also been performed to evaluate the formability of various rib-shape designs. The optimum design has then been done considering the hot touch feeling as well as the metal sheet formability.

Section: Optimum Design Of Bottle Bodymentioning

confidence: 99%

Finite Element Analysis Applied to Ergonomic Design of 2-Piece Aluminum Beverage Cans and Bottles

Han¹,

Volume 6: 33rd Design Automation Conference, Parts a and B

Nishiyama³

et al. 2007

Self Cite

“…Can-makers have never stopped doing research and development to pursue lighter can ends by reducing the end size and gauge while still keeping enough buckling strength by changing the shape of end shell. Since the late 1980s, the Finite Element (FE) method has been applied to predict can performance and to simulate the can forming process [5][6][7][8][9][10][11][12][13][14] . Development of functional cans, such as easy crushing cans, finger friendly can body and end, easy drinking bottles have recently been implemented utilizing the FE analyses [10][11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

“…Since the late 1980s, the Finite Element (FE) method has been applied to predict can performance and to simulate the can forming process [5][6][7][8][9][10][11][12][13][14] . Development of functional cans, such as easy crushing cans, finger friendly can body and end, easy drinking bottles have recently been implemented utilizing the FE analyses [10][11][12][13] . In our previous study for the end shell development, structural optimization technology based on numerical simulations has been applied to minimize the weight of end shells subject to constraints of the buckling strength, the panel growth suppression and the other design requirements 14 .…”

Section: Introductionmentioning

confidence: 99%

Thinning Minimization for Forming Aluminum Beverage Can End Shells

Han¹,

13th AIAA/ISSMO Multidisciplinary Analysis Optimization Conference

Otsuka

et al. 2010

Self Cite

Forming simulations of the can end shell have been implemented based on both of the axisymmetric model and three-dimensional models, for a better understanding of the forming process. The comparison shows that the simulation results agree reasonably well with the experimental observations of the actual forming process. The influence of the loads applied to tools, the clearance between tools, the shape of the tool profile and the position of tools have been investigated, based on the axisymmetric model to save computational time. The design optimization method based on the numerical simulations have been applied to search the optimum design points, in order to reduce the thinning subjected to the constraints of the geometric shape of the shell and the suppression of wrinkles. The optimization results show that the thinning can be improved up to 4% by optimizing the forming route, adjusting the clearance and the load, and modifying the tool shape. NomenclatureH 1 = Unit depth of the shell H 2 = Lip height of the shell H 3 = Panel depth of the shell P 1 = load applied to the upper piston P 2 = load applied to the die center P 3 = load applied to the lower piston P 4 = load applied to the panel punch E = Young's modulus of the blank ν = Poisson's ratio of the blank σ 0 = yielding stress of the blank T 0 = initial thickness of the blank before forming T min = minimum thickness of the shell after forming ε 0 = minimum circumferential plastic strain of the shell= rate of change in the load applied to the panel punch

“…Moreover, the finite element method was applied to simulate the configuration change of the human fingertip when grasping the aluminum beverage bottle for hot vending and then to evaluate the tactile sensation of heat numerically (Han et al, 2006). However, no works can be found on observing the relation between the pain and the force-displacement curves when a load is applied to the fingertip pulp.…”

Section: Introductionmentioning

confidence: 99%

Ergonomic design of beverage can lift tabs based on numerical evaluations of fingertip discomfort

Han¹,

Nishiyama²,

et al. 2008

Applied Ergonomics

Self Cite

This paper introduced the finite element analyses to evaluate numerically and objectively the feelings in the fingertip when opening aluminum beverage cans in order to design the shape of the tab. At first, experiments of indenting vertically the fingertip pulp by a probe and tabs of the aluminum beverage can ends have been done to observe force responses and feelings in the fingertip. It is found that a typical force-displacement curve may be simplified as a combination of three curves with different gradients. We feel a touch at Curve 1 of the force-displacement curve, then feel a pressure and our pulse at Curve 2, finally feel discomfort followed by a pain in the fingertip at Curve 3. Moreover, the finite element analyses have been performed to simulate the tab indenting the fingertip vertically to confirm that the simulation results agree well with the experimental observations. Finally, numerical simulations of finger pulling up the tab of the can end has also been performed and discomfort in the fingertip has been presented by the maximum value of the A paper submitted to Applied Ergonomics 2 contact stress of the finger model. Comparisons of three kinds of tab ring shape designs showed that the tab that may have a larger contact area with finger is better.