Due to their superior features, such as low coefficients of friction, resistance against chemical effects, and good strengthto-weight ratio, polymer-based composite bearings are widely used in industries. Polymer composite bearing calculations are made based on experimental study data. In this study, experimental investigations were conducted on polytetrafluoroethylene composite radial bearings reinforced with 35% carbon and 40% bronze material where bearing loads, sliding distances, and wear were taken into consideration. The results for both materials are given graphically and compared with each other. In accordance with the results, it was considered that polytetrafluoroethylene/bronze composite film thickness and film composition on the surfaces extensively affect wear rate. It was found that these films' thicknesses depends on adhesion between steel and composite surfaces, cohesive properties of composite, load, and sliding distance.
Basalt/epoxy composite pipes in a [±55]4 winding configuration were produced on CNC filament winding machines (10 N fiber tension and ~11 mm bandwidth). In the experiments, a 34 m/s impact velocity was set using the double-disc method, and five different particle impingement angles (30, 45, 60, 75, and 90°) were used to determine the erosive effect on the outer surfaces of filament wound composite pipes under the influence of 600 mm erodent particles with angular geometry in the test set, complying with the ASTM G76-95 standard. The winding patterns in the lamina (±55 angle-ply laminate region) and zigzag (±55 zigzag region) regions of BFR/EP pipes were determined to have significant effects on solid particle erosion resistance, as evidenced by the SEM images.
Kompozit malzemeler birçok alanda özellikle metal esaslı malzemelere alternatif olarak uygulama alanı bulmaktadır. Bu deneysel çalışmada Bazalt Elyaf Takviyeli Epoksi (BET/EP) kompozit boruların savunma sanayi, denizcilik, alt yapı ve aktarım tesislerinde kullanımı dikkate alınmıştır. Bu amaçla yüksek kimyevi ve ısıl denge, iyi mukavemet, sıcaklık/elektrik ve ses yalıtım özellikleri de gösteren Bazalt Elyaf Takviyesi (BET) tercih edilmiş olup Epoksi (EP) matris ilavesiyle CNC filament sarım makinelerinde [±55]4 sarım konfigürasyonunda kompozit borular ürettirilmiştir. Boru içerisinde partiküllü akışın olduğu uygulamaların temelinde farklı hızlara sahip aşındırıcıların boru içerisindeki akış yönü doğrultusunda farklı açılarda çarpması amaçlanmıştır.
Boru içi katı partikül erozif aşınmayı araştırmak için, ASTM G76-95 standardıyla uyumlu deney setinde çift disk metodu kullanılarak belirlenen 23, 28, 34 ve 53 m/s çarpma hızlarındaki açısal geometriye sahip ~600 m aşındırıcı partiküller, 30°, 45° ve 60° olmak üzere üç farklı çarpma açısında BET/EP kompozit boruların iç yüzeyine etki edecek şekilde tekrarlı deneyleri yapılmış ve elde edilen sonuçlar yorumlanmıştır.
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