Çekme Performansı için 3B Baskılı Auxetic Yapıların Optimizasyonu: Hücre Boyutu ve Şekil Yönelimi Üzerine Taguchi Yönteminin Uygulaması

Year 2024, Volume: 5 Issue: 3, 284 - 294

Fatih Pehlivan

https://doi.org/10.52795/mateca.1576416

Abstract

Auxetic yapılar, negatif Poisson oranı sergileyen benzersiz mekanik özellikleriyle karakterize edilir; bu, geleneksel malzemelerin aksine, gerildiklerinde yanal olarak genişledikleri ve sıkıştırıldıklarında yanal olarak büzüldükleri anlamına gelir. Bu ayırt edici davranış, auxetic malzemelerin gelişmiş enerji emilimi, kayma direnci ve çentik direnci gibi gelişmiş mekanik özelliklere sahip olmasını sağlar. Bu çalışma, şekil yöneliminin ve hücre boyutunun çekme mekanik özellikleri üzerindeki etkisini ve optimizasyonunu inceleyen az sayıdaki araştırmadan biri olması nedeniyle özel bir yenilik taşımaktadır. Bu nedenle, maskeli stereolitografi (MSLA) yazıcısı kullanılarak üç farklı hücre boyutu (3 mm, 2 mm, 1.5 mm) ve üç farklı şekil oryantasyonu (0º, 45º, 90º) kullanılarak toplam dokuz farklı numune üretilmiş ve bunların gerilme mekanik özellikleri incelenmiştir. En iyi hücre boyutu ve şekil yönelimi Taguchi'nin maksimum sinyal-gürültü oranı (S/N) analizi ile belirlenmiş ve veriler Varyans Analizi (ANOVA) testi ile analiz edilmiştir. Özellikle, 1.5 mm'lik bir hücre boyutu ve 90º'lik bir şekil yöneliminin, 348.44 N'lik maksimum kırılma kuvveti ve 224.91 J'lik enerji emilimi ile en iyi performansı sağladığı bulunmuştur. Bu araştırma, gelişmiş mekanik performans için 3B baskının optimizasyonuna ve eklemeli imalat alanına katkıda bulunmaktadır.

Keywords

Auxetic yapılar, Stereolitografi, Eklemeli imalat, Taguchi yöntemi, Mekanik özellikler, Optimizasyon

Optimizing 3D-Printed Auxetic Structures for Tensile Performance: Taguchi Method Application on Cell Size and Shape Orientation

Abstract

Auxetic structures are characterized by their unique mechanical property of exhibiting a negative Poisson's ratio, which means they expand laterally when stretched and contract laterally when compressed, contrary to conventional materials. This distinctive behavior enables auxetic materials to possess enhanced mechanical properties such as improved energy absorption, shear resistance, and indentation resistance. This study is of special novelty as it is one of the few investigations examining the effect and optimization of shape orientation and cell size on tensile mechanical properties. For this reason, a total of nine different specimens were produced using three different cell sizes (3 mm, 2 mm, 1.5 mm) and three different shape orientations (0º, 45º, 90º) using a masked stereolithography (MSLA) printer, and their tension mechanical properties were investigated. The best cell size and shape orientation were determined by Taguchi's maximum signal-to-noise ratio (S/N) analysis, and the data was analyzed with the Analysis of Variance (ANOVA) test. Specifically, a cell size of 1.5 mm and a shape orientation of 90º delivered the best performance, with a maximum fracture force of 348.44 N and energy absorption of 224.91 J. This research contributes to optimizing 3D printing for improved mechanical performance and to the field of additive manufacturing.

Keywords

Auxetic structures, Stereolithography, Additive manufacturing, Taguchi method, Mechanical properties, Optimization

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