摘要
A link between the electromagnetic code, ANSYS/Emag and the structural code, Ls-dyna was developed, and the numerical modeling of electromagnetic forming for aluminum alloy tube expansion was performed by means of them (discharge energy 0.75kJ). A realistic distribution of magnetic pressure was calculated. The calculated values of displacement along the tube axis and versus time are in very good agreement with the measured ones. The maximum strain rate is 1122s -1, which is not large enough to change the constitutive equations of aluminum alloy. With the augment of discharge energy (0.51.0kJ), the relative errors of the maximum deformation increase from 2.93% to 11.4%. Therefore, coupled numerical modeling of the electromagnetic field and the structural field should be performed to investigate the electromagnetic forming with larger deformation.
A link between the electromagnetic code, ANSYS/Emag and the structural code, Ls-dyna was developed, and the numerical modeling of electromagnetic forming for aluminum alloy tube expansion was performed by means of them （discharge energy 0.75 kJ）. A realistic distribution of magnetic pressure was calculated. The calculated values of displacement along the tube axis and versus time are in very good agreement with the measured ones. The maximum strain rate is 1 122 s^-1, which is not large enough to change the constitutive equations of aluminum alloy. With the augment of discharge energy （0. 5 - 1.0 kJ）, the relative errors of the maximum deformation increase from 2.93 % to 11.4 %. Therefore, coupled numerical modeling of the electromagnetic field and the structural field should be performed to investigate the electromagnetic forming with larger deformation.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2005年第5期1040-1044,共5页
Transactions of Nonferrous Metals Society of China
