Szczegóły publikacji
Opis bibliograficzny
Estimation of simulation errors due to inaccurate evaluation of material properties in metal forming / Danuta SZELIGA, Stanisław WĘGLARCZYK, Maciej PIETRZYK // Journal of Machine Engineering ; ISSN 1895-7595. — Tytuł poprz.: Machine Engineering. — 2006 — vol. 6 no. 1, Manufacturing accuracy increasing problems optimization, s. 63–72. — Bibliogr. s. 71–72. — XVII Workshop on Supervising and diagnostics of machining systems
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 32295 |
|---|---|
| Data dodania do BaDAP | 2007-03-16 |
| Rok publikacji | 2006 |
| Typ publikacji | referat w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of Machine Engineering |
Abstract
Determination of the error of the finite element simulations of metal forming processes, which is caused by inac?curacies of the rheological law, is the general objective of the paper. Evaluation of various plastometric tests is the particular aim of the first part of the research. Sources of errors in the tests are analysed and the influence of the assumed friction coefficient on the flow stress calculated by the inverse method is assessed. Sensitivity pa?rameter, defined as partial derivative of the flow stress with respect to the friction coefficient, is calculated. Fur?ther research focus on evaluation of capabilities of mathematical models, which are used as constitutive laws in the FE codes. Analysis of capabilities of various functions to describe properly flow stress was performed and er?rors due to approximation of the experimental data were determined. The last part of the research focus on evaluation of the error of the FE simulations caused by an inaccurate determination of the flow stress. Sensitivity analysis was performed for the industrial forging process. Closed die forging, in which free flow of material is allowed at certain stage of deformation, was selected for the analysis. Sensitivity of the load and filling of the groove with respect to material parameters was determined. In consequence, evaluation of simulation errors due to inaccurate determination of material properties was performed.
