TY  - EJOU
AU  - Xu, J. P. 
AU  - Liu, Y. Q. 
AU  - Li, S. Q. 
AU  - Wu, S. C. 

TI  - Fast analysis system for embossing process simulation of commemorative coin--CoinForm
T2  - Computer Modeling in Engineering \& Sciences

PY  - 2008
VL  - 38
IS  - 3
SN  - 1526-1506

AB  - For the first time, a special-purpose finite element simulation system CoinForm is developed to analyze the embossing process of commemorative coin, in which one-point reduced integration approach is used in solid element finite element dynamic explicit program. Viscous damping hourglass control algorithm can effectively suppress the spurious modes activated by reduced integration and the computational effort is saved about 93% compared with other method that evaluate anti-hourglass force using stabilization matrix. The embossing process of commemorative coin is then simulated and compared with results from the DEFORM 3D software, which verify the excellent performance of present CoinForm system. According to the flow law of materials from simulation results, this system is found to better improve the geometry of piece for the high quality printed pattern. More importantly, the criterion for positioning the zone of band is obtained in terms of simulation results, which can significantly avoid the defect of light band by optimizing the shape of piece.
KW  - One-point integration
KW  -  Hourglass control
KW  -  Commemorative coin
KW  -  Embossing process
KW  -  CoinForm

DO  - 10.3970/cmes.2008.038.201