ANALYSIS OF COLD FORGING PROCESS BY ADAPTIVE FEM METHOD

• Published in: JOURNAL FOR TECHNOLOGY OF PLASTICITY Vol. 36; no. 2
• Main Authors: Randelovic, Sasa, Krumphals, Friedrich, Jovanovic, Milos, Tanikic, Dejan, Denadic, Dalibor
• Format: Journal Article
• Language: English
• Published: 01.12.2011
• Subjects: Cold forging; Computer simulation; Finite element method; Forming; Mathematical models; Nonlinearity; Solid mechanics; Stress-strain relationships
• ISSN: 0354-3870
• DOI: 10.2478/v10211-011-0013-0

In this paper is presented implementation of adaptive finite element method in real conditions of plastic deformation during cold forging process simulation, with observing of the characteristic areas in stress-strain field in tool cavity, as well as material displacement. The researches and development of this methods and their application in non-linear solid mechanics in last decade are focused on creating the most suitable algorithm model for analyze for concrete forming process. These efforts resulted in flexible and adaptable numerical methods which allow following deformation process through observing of material flow, stress-strain state and many other process parameters for very complex predefined conditions. The analyses and results of this numerical model that approximate real-state forming process with a high level of accuracy is a great advantage of this methods, especially in case of solving problems with large boundary motion in non-linear solid mechanics, for instance, in bulk forging technology.Original Abstract: U ovom radu je predstavljena implementacija adaptivnog postupka metode konacnih elemenata u realnim uslovima plasticne deformacije tokom simulacije procesa hladnog kovanja, sa pracenjem karakteristicnog podrucja naponsko-deformacionog stanja u supljini alata, kao i toka materijala. Istrazivanja i razvoja ovog metoda i njihova primena na nelinearne probleme mehanike cvrstog tela, u poslednjoj deceniji su fokusirani na formiranje najpogodnijih algoritama za analizu konkretnih procesa oblikovanja. Ovi napori su rezultirali razvojem fleksibilnih i adaptivnih numerickih metoda koje omogucavaju pracenje procesa deformisanja kroz posmatranje toka materijala, naponsko-deformacionog stanja i mnogih drugih parametara procesa sa veoma kompleksnim predefinisanim uslovima. Analize i rezultati ovog numerickog modela koji aproksimira realne uslove procesa deformisanja sa visokim stepenom tacnosti veoma su bitni, posebno u slucaju resavanja nelinearnih problema sa velikim granicnim pomeranjim u mehanici cvrstog tel, kao sto je npr. slucaj pri zapreminskoj obradi deformisanjem.