FARKLI ALÜMİNYUM ALAŞIMLARINDA BBC2000, BBC2003, BBC2005 VE BBC2008 AKMA KRİTERLERİNİN KARŞILAŞTIRILMASI

Öz

   Sonlu elemanlar analiz programlarında malzemenin elastik ve plastik davranışı doğru tanımlanırsa, sonuçların hata payı düşmektedir. Başarılı analiz sonuçları elde etmek için önemli parametrelerden birisi ise akma kriteri seçimidir. Literatürde geliştirilmiş birçok akma kriteri mevcut iken bazıları sonlu elemanlar analiz programlarına dahil edilmektedir. Bazı analiz programlarında bu kriterler tanımlıyken (model parametre değerleri girilerek), bazılarında da programa kod yazarak ilave edilmektedir. Bu çalışmada BBC2000, BBC2003, BBC2005, BBC2008 akma kriterlerinin iki farklı alüminyum alaşımındaki model tahminleri karşılaştırılmıştır. Aynı zamanda BBC2008 akma kriterinde parametre sayısının etkisi de incelenmiştir. Daha fazla parametreli modelin deney sonuçlarını daha iyi tahmin ettiği görülmüştür.

Anahtar Kelimeler

• BBC2000
• BBC2003
• BBC2005
• BBC2008
• AA7003
• AA6063

COMPARISON OF BBC2000, BBC2003, BBC2005 AND BBC2008 YIELD CRITERIA IN DIFFERENT ALUMINUM ALLOYS

Abstract

 If the elastic and plastic behavior of the material is correctly defined in the finite element analysis programs, the margin of error reduces. One of the important parameters to obtain successful analysis results is the yield criterion choice. While there are many yield criteria developed in the literature, some of them are included in finite element analysis programs. In some analysis programs while these criteria are defined (by entering the model parameter values) and some are added by writing code to the program. In this study, model estimates of BBC2000, BBC2003, BBC2005, BBC2008 yield criteria are compared in two different aluminum alloys. At the same time, the effect of the parameters number on the BBC2008 yield criterion is examined. It is seen that the more parameters model predicts better the experimental results.

Keywords

• BBC2000
• BBC2003
• BBC2005
• BBC2008
• AA7003
• AA6063

Kaynakça

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