Contact search strategies for FEM simulation of the blow molding process

In this paper, the e$ciency and accuracy of contact search algorithms for the blow molding simulation were discussed. In order to increase the e$ciency of the contact search, we proposed and implemented three kinds of global search algorithms and compared them with two existing methods in terms of both formulation and CPU time. The proposed sorted moving box method was "nally proved to be the most e$cient one, without loss of stability. To increase the accuracy, a contact}tolerance}adjustable local search algorithm was also proposed. Successful simulation of the stretch blow molding process was given as an example