Taşıt Silindirik LPG Tanklarının Mukavemet Performans Değerlendirmeleri

Öz

Bu çalışma, Türkiye'de üretilen ve kullanılan araç silindirik sıvılaştırılmış petrol gazı (LPG) tanklarının dayanım performanslarının Avrupa ve Türk Standartları dikkate alınarak incelenmesi ve karşılaştırılmasını amaçlamaktadır. LPG tankları, hem deneysel hem de bilgisayar destekli teknikler kullanılarak patlama basınçlarını ve yorulma performanslarını belirlemek için patlama ve yorulma testlerine tabi tutulmuştur. Tankların mukavemetini araştırmak için üniversal bir test tezgahı geliştirilmiş ve hem patlama hem de yorulma testlerinde kullanılmak üzere kalibre edilmiştir. Her bir tank markası için patlama ve yorulma hasar konumları açısından elde edilen deneysel sonuçlar, sonlu elemanlar tabanlı simülasyonlar kullanılarak elde edilen sonuçlarla karşılaştırılmıştır. SolidWorks'te 3B olarak görsel katı modeller çizilmiş ve ardından gerilimler, deformasyonlar, patlama ve yorulma hasar konumları gibi sonuçları elde etmek için bu LPG silindirleri üzerinde Sonlu Elemanlar Anallizi (FEA) simülasyonları gerçekleştirmek için ANSYS yazılımı kullanılmıştır. Bu karşılaştırma sonucunda bazı marka silindirik LPG tanklarının araçlarda kullanım için daha dayanıklı ve güvenli olduğu gözlemlenmiştir. LPG tankı üretiminde aynı standart gereklilikleri ve aynı ticari malzeme kullanıldığından, bazı firmaların tasarım, imalat ve özellikle kaynak proseslerini yeniden gözden geçirmeleri gerektiği ortaya çıkmaktadır. Bu bağımsız ve objektif çalışmanın sonuçları, LPG tank üreticileri için bir uyarı ve müşterileri için de güvenli ürün seçiminde bir rehber olarak da kullanılabilir.

Anahtar Kelimeler

• Taşıt silindirik LPG tankı
• patlama testi
• yorulma performans testi
• sonlu elemanlar analizi
• nonlineer hasar analizi

Strength Performance Evaluations of Vehicle Cylindrical LPG Tanks

Öz

This study aims to examine and compare the strength performances of vehicle cylindrical liquefied petroleum gas (LPG) tanks produced and used in Turkey, taking into account European and Turkish Standards. The LPG tanks were subjected to burst and fatigue tests to explore their burst pressures and fatigue performances using both experimental and computer aided techniques. To investigate the strength of the tanks, a universal test bench was developed and calibrated for use in both burst and fatigue tests. The obtained experimental results in terms of burst and fatigue failure locations for each brand of tank are compared with the results obtained using finite element based simulations. Visual solid models in 3D were drawn in SolidWorks and then ANSYS software was used to perform Finite Element Analysis (FEA) simulations on those LPG cylinders to obtain the results, such as stresses, deformations, burst and fatigue failure locations. As a result of this comparison, it has been observed that some brands of cylindrical LPG tanks are more durable and safe for use in vehicles. Since the same standard requirements and the same commercial material are used in LPG tank production, it is revealed that some companies need to reconsider their design, manufacturing and especially welding processes. The results of this independent and objective study can also be used as a warning for LPG tank manufacturers and as a guide for their customers in choosing a safe product.

Anahtar Kelimeler

• Vehicle cylindrical LPG tank
• burst test
• fatigue performance test
• finite element analysis
• nonlinear failure analysis

Kaynakça

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