Investigation of Thermomechanical Buckling Characteristics of Auxetic Core Layered Smart Sandwich Plates

Abstract

Abstract: This study analytically investigated the thermo-mechanical buckling behavior of smart sandwich plates with auxetic core layer based on the theory of high-order shear deformation. The outer layers of the plate were modeled as Ba-TiO₃ and CoFe₂O₄, and the core layer was modeled as nickel material with auxetic cell structure. The equations of motion derived using Hamilton's Principle were solved by Navier method, and the effects of auxetic core properties and electric and magnetic fields were evaluated. Although the analytical model was based on the literature, new equations were developed for the interaction of auxetic core and smart materials. The findings showed that auxetic parameters and external fields have significant effects on the buckling temperature and critical loads. This study provides a theoretical basis for the thermo-mechanical buckling analysis of auxetic core sandwich plates.

Keywords

• Auxetic Structure
• Smart Sandwich Plate
• Magneto Strictive Material
• Electro Elastic Material
• Thermal Buckling

Auxetic Çekirdek Katmanlı Akıllı Sandviç Plakaların Termomekanik Burkulma Karakteristiklerinin İncelenmesi

Abstract

Bu çalışma, yüksek dereceli kayma deformasyonu teorisini temel alarak, auxetic çekirdek katmanlı akıllı sandviç plakaların termo-mekanik burkulma davranışını analitik olarak incelemiştir. Plakanın dış katmanları BaTiO₃ ve CoFe₂O₄, çekirdek katmanı ise auxetic hücre yapısına sahip nikel malzeme ile modellenmiştir. Ham-ilton İlkesi kullanılarak türetilen hareket denklemleri, Navier yöntemiyle çözül-müş, auxetic çekirdek özellikleri ile elektrik ve manyetik alanların etkileri değerlendirilmiştir. Analitik model literatüre dayanmakla birlikte, auxetic çe-kirdek ve akıllı malzemelerin etkileşimine yönelik yeni denklemler geliştirilmiştir. Bulgular, auxetic parametreler ve harici alanların, burkulma sıcaklığı ve kritik yükler üzerinde önemli etkileri olduğunu göstermiştir. Bu çalışma, auxetic çe-kirdekli sandviç plakaların termo-mekanik burkulma analizi için teorik bir temel sunmaktadır.

Keywords

• Auxetic Yapı
• Akıllı Sandviç Plaka
• Manyetostriktif Malzeme
• Elektro Elastik Malzeme
• Termal Burkulma

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