EFFECT OF ANISOTROPY DETERMINATION METHODS ON FORMING LIMIT CURVE PREDICTION OF 304L STAINLESS STEEL

Year 2017, , 737 - 751, 31.07.2017

Serkan Toros

https://doi.org/10.28948/ngumuh.342073

Cited By: 1

Abstract

   In recent years, numerous
researchers have focused on the determination of the formability limits of the
sheet materials experimentally and numerically. Due to some troubles
encountered during the experimental studies, the modeling of the formability
characteristics of the materials via simple experiments like tensile tests is
the main issue for the most researchers. In the literature, most of the
developed model results strongly depend on yield functions used and their
parameters which reflect the materials’ anisotropic behaviors. In this study,
the capability of BBC family yield functions (BBC2000, 2003, 2005 and 2008)
are investigated to construct the forming limit diagram of 304L stainless steel
by using the Marciniak-Kuczynski instability model. The models
are evaluated for different anisotropy determination approaches and the
predicted results have been compared with the experimental forming limit
diagram.

Keywords

304L, forming limit diagram, BBC family, Marciniak-Kuczynski model

304L PASLANMAZ ÇELİĞİN ŞEKİLLENDİRME SINIR DİYAGRAMININ BELİRLENMESİNDE ANİZOTROPİ BELİRLEME METODUNUN ETKİSİ

Abstract

   Son
yıllarda birçok araştırmacı sac malzemelerin şekillendirme sınırlarının
deneysel ve nümerik olarak belirlenmesi üzerine odaklanmışlardır. Deneysel çalışmalar
esnasında birçok zorluklarla karşılaşılmasından ötürü, birçok araştırmacı için
malzemelerin şekillendirme karakteristiklerini çekme deneyi gibi basit
deneylerden modellenerek elde edilmesi temel bir mesele haline gelmiştir.
Literatürde geliştirilen birçok model sonucu kullanılan akma yüzey
fonksiyonlarına ve malzemelerin anizotropik davranışlarını yansıtan model
parametrelerine büyük ölçüde bağlı bulunmaktadır. Bu çalışma kapsamında BBC
ailesi (BBC2000,
2003, 2005 ve 2008) akma yüzeyleri Marciniak-Kuczynski kararsızlık modeli ile 304L paslanmaz çeliğin
şekillendirme sınır diyagramının oluşturulması noktasında kullanılmıştır.
Modeller farklı anizotropi belirleme yöntemleri için değerlendirilmiş ve tahmin
edilen sonuçlar deneysel sonuçlarla karşılaştırılmıştır.

Keywords

304L, şekillendirme sınır diyagramı, BBC ailesi, Marciniak–Kuczynski modeli

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