Kafes geometriye sahip sandviç bir yapının mekanik özelliklerinin deneysel ve sayısal analizi

Öz

Bu çalışmada polilaktik asit malzemesinden katmanlı üretim yöntemiyle imal edilen sandviç bir kafes yapının basma yükü altındaki mekanik davranışı incelenmiştir. Bu kapsamda yarı-statik basma testleriyle deneysel olarak ve sonlu elemanlar analizleriyle teorik olarak yapının yer değiştirme karakteristiği, yük taşıma kapasitesi ve enerji absorpsiyonu gibi özellikleri değerlendirilmiştir. Ardından deneysel ve teorik sonuçlar karşılaştırılmış ve yapının mekanik özelliklerinin belirlenmesi için gerçekleştirilen sonlu elemanlar analizlerinin etkinliği değerlendirilmiştir. Çalışma, katmanlı üretim teknolojisi ile kafes yapı geometrileri tasarlayacak ve imalatını gerçekleştirecek araştırmacılar için bir rehber niteliğindedir. Deneysel çalışmaların yüksek maliyetli ve zaman alıcı olması nedeniyle, sayısal analizlerin uygun biçimde kullanılması, kapsamlı deneysel çalışmalar öncesinde tasarım süreçlerinin bilgisayar ortamında sistematik ve verimli bir şekilde yürütülmesine olanak tanımaktadır. Böylece, yapısal performansın ön değerlendirmesi sağlanarak, üretim sürecinde zaman ve maliyet açısından optimizasyon yapılmasına katkı sunulması amaçlanmaktadır.

Anahtar Kelimeler

• Katmanlı üretim
• Sandviç kafes yapılar
• Sonlu elemanlar analizi
• Basma testleri

Experimental and numerical analysis of the mechanical properties of a sandwich structure with lattice geometry

Öz

In this study, the mechanical behavior of a sandwich lattice structure manufactured using additive manufacturing from polylactic acid material under compressive loading was investigated. For this purpose, the displacement characteristics, load-bearing capacity, and energy absorption properties of the structure were evaluated both experimentally through quasi-static compression tests and theoretically using finite element analyses. Subsequently, the experimental and theoretical results were compared, and the effectiveness of finite element analyses in determining the mechanical properties of the structure was assessed. This study serves as a guide for researchers who aim to design lattice structure geometries and manufacture them using additive manufacturing technology. Due to the high cost and time-consuming nature of experimental studies, the appropriate use of numerical analyses enables the systematic and efficient execution of design processes in a virtual environment before extensive experimental investigations. In this way, the preliminary evaluation of structural performance is ensured, contributing to time and cost optimization in the manufacturing process.

Anahtar Kelimeler

• Additive manufacturing
• Sandwich Lattice structures
• Finite element analysis
• Compression tests

Kaynakça

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