Dört Noktadan Bükülme Altında Paslanmaz Çelik ve CFRP Kemik Plakalarının Eğilme Performansının Karşılaştırmalı Deneysel Analizi

Öz

Metalik kemik plakaları, kırık sabitlemesi için en yaygın klinik uygulamalardan biridir, ancak rijitlik-ağırlık oranının optimizasyonunu göz ardı edilmektedir. Bu çalışmada, aynı geometriye sahip 316L paslanmaz çelik ve hafif yapılı karbon fiber takviyeli polimer (CFRP) plakaların karşılaştırılmasına odaklanılmıştır. Plakalar hem kısa hem de uzun konfigürasyonlarda dört noktalı eğilme standardı altında test edilmiştir. Rijitlik ve eğilme momenti parametreleri yük-sehim eğrilerinden elde edilmiş, ayrıca özgül moment ve özgül rijitlik de belirlenmiştir. CFRP plakalar daha yüksek özgül eğilme rijitliği gösterirken, çelik daha yüksek mutlak rijitlik sergilemiştir. Kısa CFRP plaka ise, deliğin yakınındaki net kesit kaybına bağlı olarak daha düşük rijitlik göstermiştir. Mekanik bulgular, CFRP'nin, özellikle bağlantı elemanı bölgesi birincil tasarım özelliği olarak kabul edildiğinde, rijitlik-kütle performansını önceliklendiren tasarımlar için, özellikle uzun plakalarda uygun bir malzeme olduğunu göstermektedir.

Anahtar Kelimeler

• CFRP kemik plakaları
• 316L paslanmaz çelik kemik plakaları
• Dört noktadan bükülme
• Sertlik-ağırlık oranı.

A Comparative Experimental Analysis of Flexural Performance of Stainless Steel and CFRP Bone Plates under Four-Point Bending

Öz

Metal bone plates are one of the most common clinical applications for fracture fixation; however, optimization of the stiffness-to-weight ratio is often overlooked. This study compared 316L stainless steel plates and lightweight carbon fiber-reinforced polymer (CFRP) plates of identical geometry. The plates were tested using the standard four-point bending test in both short and long configurations. Stiffness and bending moment parameters were obtained from load-displacement curves, and specific stiffness and specific moment were also determined. CFRP plates demonstrated higher specific bending stiffness, while steel exhibited higher absolute stiffness. The short CFRP plate exhibited reduced stiffness attributable to a net loss of cross-sectional area near the hole. The mechanical findings suggest that CFRP is a suitable material for designs that prioritize stiffness-to-mass performance, particularly in elongated plates when the connection-element region is considered a primary design feature.

Anahtar Kelimeler

• CFRP bone plates
• 316L stainless steel bone plates
• Four-point bending
• Stiffness-to-weight ratio

Kaynakça

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