Compressive Performance of the PVC Foam Materials used as Sandwich Panel Core

Year 2024, , 301 - 307, 11.07.2024

Ahmet Çetin Necdet Geren

https://doi.org/10.21605/cukurovaumfd.1513991

Abstract

PVC foam materials are preferred in many engineering applications because of their lightweight nature and strength/weight ratio. They are mainly used as the core material in the middle of sandwich panels with improved flexural rigidity. The mechanical performances of sandwich panels, such as flexural load-deflection, core shear load, core shear failure load, and indentation failure load, directly depend on the mechanical properties of the core material. In this study, compression tests of AIREX C70 PVC foams with three different densities were performed. The elastic modulus and strength results obtained from the compression tests were compared with the mechanical properties provided in the dataset supplied by the material manufacturer. The core yield loads of a concept sandwich panel were then obtained using the compression mechanical properties of the core, which were obtained from datasets and experimental results. When the core yield loads obtained using both data were compared, it was revealed that the load obtained using the dataset data was 23% inaccurate. Thus, the study explained why compression tests are necessary even though the mechanical properties of PVC foam materials are known in the datasheet.

Keywords

AIREX C70 PVC foam, Sandwich panels, Core yield loads, Compression tests

Sandviç Panellerde Çekirdek Malzeme Olarak Kullanılan PVC Köpük Malzemelerin Basınç Yüklerine Karşı Performansı

Abstract

PVC köpük malzemeler, hafiflikleri ve mukavemet/ağırlık oranları nedeniyle birçok mühendislik uygulamasında tercih edilmektedir. Özellikle eğilme rijitliği artırılmış sandviç panellerin ortasında çekirdek malzeme olarak kullanılırlar. Sandviç panellerin eğilme yükü-sapması, çekirdek kesme yükü, çekirdek kesme kırılma yükü ve çentik kırılma yükü gibi mekanik performansları doğrudan çekirdek malzemenin mekanik özelliklerine bağlıdır. Bu çalışmada, üç farklı yoğunluğa sahip AIREX C70 PVC köpüklerin sıkıştırma testleri gerçekleştirilmiştir. Basma testi sonuçlarından elde edilen elastik modül ve mukavemet sonuçları, malzeme tedarikçisi tarafından sağlanan mekanik özellikler veri sayfası verileri ile karşılaştırılmıştır. Daha sonra, konsept bir sandviç panelin çekirdek akma yükleri veri föyündeki ve deneysel sonuçlardaki çekirdeğin basma mekanik özellikleri kullanılarak, elde edilmiştir. Her iki veri ile elde edilen çekirdek akma yükleri karşılaştırıldığında, veri föyündeki verileri ile elde edilen yükün %23 hatalı olduğu ortaya çıkmıştır. Böylece çalışma, PVC köpük malzemelerin mekanik özelliklerinin veri föyünde bilinmesine rağmen basma testlerinin neden gerekli olduğunu açıklamaktadır.

Keywords

AIREX C70 PVC köpük, Sandviç paneller, Çekirdek akma yükleri, Sıkıştırma testleri

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