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buaawhy銀蟲(chóng) (小有名氣)
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[求助]
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the density of the aluminium is increased with a factor of 2e6(2乘以10的6次方）。 |
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In a quasi-static simulation of a forming process, the stability requirements result in very small time steps and consequently a large computational time. One possibility of avoiding the time step problem is to speed up the analyses [4]. In the present work, however, the problem is overcome by introduction of mass scaling. Thus, the density of the aluminium is increased with a factor of 2e6. The applicability of this approach is demonstrated in Fig. 7, comparing the results from LS-DYNA with similar analyses performed with the implicit code ABAQUS [14]. As implicit formulations follow the non-linear response very closely through frequent equilibrium checks, the ABAQUS results can be considered as correct within the limitations imposed by the model uncertainties. A total of eight analyses utilising the two alloys AA6082 and AA7108, two die radii and two wall thicknesses is depicted in Fig. 7. The LS-DYNA and ABAQUS results agree well, as |
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