Inverse analysis for identification of rheological and friction models in metal forming

摘要: Abstract The paper deals with application of the inverse analysis to identification friction and rheological models in metal forming. direct model based on finite element approach algorithm are described. method is validated by performing computations for different plastometric tests: uniaxial compression, ring cube plane strain compression channel test. concerns both hot tests room temperature tests. It shown that, general, when applied results insensitive type test, sample dimensions etc. This observation not valid which constrain spread fosters initiation micro-shear bands leads a decrease flow stress. Parameter sensitivity objective second part paper. Two aspects considered. first evaluation output (measured) parameters respect parameters. shows that loads most sensitive shape compression. aspect focused coefficients, assumed calculations. observed test least errors coefficient. On other hand, coefficient identified, almost stress material. Various optimization techniques were used efficiency methods compared. emphasized drawing general conclusion regarding best strategy difficult. Nevertheless, some recommendations given Application multicriterion one possible efficient approaches.