The finite element modelling of conventional spinning using multi-domain models

Abstract This paper reports the results of modelling of the spinning of thin sheet aluminium with the MSC MARC finite element (FE) package and its domain decomposition facility using Patent MPI software. The use of networked computers, both single and dual processor machines, is compared. The network used consists of over twenty computers and a 3COM switch with a nominal capacity of 100 Mbit/s. The effect of reduced network capacity is noted. The effect of increasing the number of computers involved is investigated in terms of resulting solution times. The results show the potential for large reductions in solution times. The impact of the background support of a network solution on the conventional computer user is examined. Partitioning of the model into ‘super-elements’ or separate domains is reviewed. Various partitions of the meshed geometry are compared, giving some indication of where pitfalls may lie in this critical aspect of multi-domain FE models. The results of the modelling are compared with experimental measurements of a conventional spinning operation using a CNC lathe. A flat disk is formed by a spinning operation into a dished shape. The material used is commercially pure aluminium.