Deformasyonlarının Modellenmesi Bölüm II LOKP Bünye Denklemleri

Yıl 2004, Cilt: 6 Sayı: 1, 12 - 22, 02.05.2004

Mehmet Fırat

Öz

Bu
makalede iç bünye değişkenleri termodinamik kuramına dayanan gözlemsel bünye
modellerinden, Lineer Olmayan Kinematik Pekleşme (LOKP) plastisite modelleri
incelenecektir. İlk olarak defirmasyon hızından bağımsız gözlemsel bünye
modellerin temel kabulleri ve ortak matematiksel bağıntılar üzerinde duruldu.
Daha sonra, literatürde önerilen akma yüzeyi kavramına dayalı üç değişik
kinematik pekleşme modeli incelendi. Son olarak gerilme kontrollü orantısal
eksensel yükleme altında 1026 karbon çeliğinin çevrimsel deformasyonları her üç
LOKP modeli kullanılarak hesaplandı ve deneysel sonuçlarla karsılaştırıldı. Üç
farklı LOKP modeliyle hesaplanan eksensel gerinimlerin, niteliksel ve
niceliksel olarak ölçülen gerinimlerle uyumluluğu olduğu görüldü. 

Anahtar Kelimeler

Orantısal Olmayan Yükleme, Lineer Olmayan Kinematik Pekleşme, Sayısal Benzetim

Kaynakça

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