Efficient implicit finite element analysis of sheet forming processes

Boogaard van den, A.H. and Meinders, T. and Huetink, J. (2003) Efficient implicit finite element analysis of sheet forming processes. International Journal for Numerical Methods in Engineering, 56 (8). pp. 1083-1107. ISSN 0029-5981

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Abstract:	The computation time for implicit finite element analyses tends to increase disproportionally with increasing problem size. This is due to the repeated solution of linear sets of equations, if direct solvers are used. By using iterative linear equation solvers the total analysis time can be reduced for large systems. For plate or shell element models, however, the condition of the matrix is so ill that iterative solvers do not reach the huge time-savings that are realized with solid elements. By introducing inertial effects into the implicit finite element code the condition number can be improved and iterative solvers perform much better. An additional advantage is that the inertial effects stabilize the Newton-Raphson iterations. This also applies to quasi-static processes, for which the inertial effects finally do not affect the results. The presented method can readily be implemented in existing implicit finite element codes. Industrial size deep drawing simulations are executed to investigate the performance of the recommended strategy. It is concluded that the computation time is decreased by a factor of 5 to 10.
Item Type:	Article
Copyright:	© 2003 Wiley InterScience
Faculty:	Engineering Technology (CTW)
Research Chair:	Mechanics of Forming Technology (MFT)
Research Group:	Applied Mechanics (AM)
Link to this item:	http://purl.utwente.nl/publications/59428
Official URL:	http://dx.doi.org/10.1002/nme.600
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