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Yüksek yoğunluklu polietilenin gerinme hızına bağlı çekme davranışı: Deneysel karakterizasyon ve sonlu elemanlar modellemesi

Strain rate–dependent tensile behavior of high-density polyethylene: Experimental characterization and finite element modeling

Vahit Keyfli0009-0007-6613-2371
Zakir Taş(YOZGAT BOZOK ÜNİVERSİTESİ)0000-0002-9102-2883
Mehmet Akif Dündar(YOZGAT BOZOK ÜNİVERSİTESİ)0000-0001-5463-6774
Kazım Ercan(BOZOK ÜNİVERSİTESİ, MÜHENDİSLİK-MİMARLIK FAKÜLTESİ, MAKİNE MÜHENDİSLİĞİ BÖLÜMÜ)0000-0003-1486-5681
Osman Özenç(YOZGAT BOZOK ÜNİVERSİTESİ)0000-0003-3455-9411
Sayfa
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Yayın Tarihi
2026-06-16
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

Genel olarak, çerçeve HDPE'nin çekme tepkisini tahmin etmek için verimli bir yaklaşım sağlar, ancak hız bağımlı sertleşme ve viskoelastisiteyi dahil etmek akma sonrası tahminleri iyileştirecektir.

📌 3 Maddede Bu Makale

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Amaç & Hipotez:Bu çalışmada, deneyler ve sonlu elemanlar analizi kullanılarak farklı gerinim hızlarında yüksek yoğunluklu polietilenin (HDPE) gerilme davranışı incelenmiştir. 5 × 10-3 ila 5 × 10-1 s-1 gerinim hızlarında tek eksenli gerilme testleri gerçekleştirilmiş ve net bir hız duyarlılığı ortaya çıkmıştır.
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Temel Bulgular & Veri:Model, akma geriliminin hız bağımlı artışını ve genel akma sonrası tepkiyi yakaladı.
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Sonuç & Katkı:Genel olarak, çerçeve HDPE'nin çekme tepkisini tahmin etmek için verimli bir yaklaşım sağlar, ancak hız bağımlı sertleşme ve viskoelastisiteyi dahil etmek akma sonrası tahminleri iyileştirecektir.
🔬Tür:Modelleme & Sayısal Simülasyon
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Yüksek Yoğunluklu Polietilen (HDPE) · Çekme Davranışı · Gerilme Hızı

Özet

Bu çalışmada, deneyler ve sonlu elemanlar analizi kullanılarak farklı gerinim hızlarında yüksek yoğunluklu polietilenin (HDPE) gerilme davranışı incelenmiştir. 5 × 10-3 ila 5 × 10-1 s-1 gerinim hızlarında tek eksenli gerilme testleri gerçekleştirilmiş ve net bir hız duyarlılığı ortaya çıkmıştır. Elastik modül ve gerçek çekme akma gerilimi gerinim hızı ile artarken, kırılma gerinimi azalmış ve bu da daha yüksek hızlarda sünekliğin azaldığını göstermiştir. ABAQUS'ta yapılan sonlu eleman simülasyonlarında, Cowper-Symonds denklemi ile birleştirilmiş Von Mises akma yüzeyi ile doğrusal Drucker-Prager modeli uygulanmıştır. Model, akma geriliminin hız bağımlı artışını ve genel akma sonrası tepkiyi yakaladı. Ancak, sertleşme eğrisi en düşük gerilme hızında tanımlandığından ve modülün hızdan bağımsız olduğu varsayıldığından, daha yüksek gerilme hızlarında gerilme sertleşmesi fazla tahmin edildi. Genel olarak, çerçeve HDPE'nin çekme tepkisini tahmin etmek için verimli bir yaklaşım sağlar, ancak hız bağımlı sertleşme ve viskoelastisiteyi dahil etmek akma sonrası tahminleri iyileştirecektir.

Abstract

This study investigated the tensile behavior of high-density polyethylene (HDPE) at different strain rates using experiments and finite element analysis. Uniaxial tensile tests were conducted at strain rates from 5 × 10-3 to 5 × 10-1 s-1, revealing clear rate sensitivity. The elastic modulus and true tensile yield stress increased with strain rate, while fracture strain decreased, indicating reduced ductility at higher rates. Finite element simulations in ABAQUS applied a linear Drucker–Prager model with a Von Mises yield surface combined with the Cowper–Symonds equation. The model captured the rate-dependent increase in yield stress and the overall post-yield response. However, strain hardening at higher strain rates was overestimated because the hardening curve was defined at the lowest strain rate and the modulus was assumed rate-independent. Overall, the framework provides an efficient approach for predicting the tensile response of HDPE, though incorporating rate-dependent hardening and viscoelasticity would improve post-yield predictions.

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Bu Makaleye Atıf Yap

Keyfli, V., Taş, Z., Dündar, M. A., Ercan, K., Özenç, O. (2026). Yüksek yoğunluklu polietilenin gerinme hızına bağlı çekme davranışı: Deneysel karakterizasyon ve sonlu elemanlar modellemesi. Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi, Cilt: 17. https://doi.org/10.28948/ngumuh.1909194

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