Improving the load distribution in the automobile front collision zone by adding 'S' shaped curved collision rail

In this study, the performance of the front collision zone of the vehicle, reinforced with an S-shaped front collision rail, was compared to that of the classic straight front collision rail. In order to create a safe living cage in automobiles, half vehicle model was used and the collision performances of two different front collision zone models were compared. Torsion, bending and frontal impact scenarios were created with Hyperworks - Optistruct software to obtain versatile and continuous load paths in the vehicle. Vehicle front collision zone elements were designed with Siemens NX software based on the resulting load paths. Material definitions, connection zones and shell element structures of the front collision zone elements were created with Altair Hypermesh software and thus the pre-treatment process was completed. In order to interpret the results better, two different front collision zone models were created and the Abaqus software was used to solve the models. From the simulations, the amount of energy damped by each model, the total displacement, the amount of load delivered to the passenger compartment and the collision force efficiency (CFE) results were obtained.

Otomobil ön çarpýþma bölgesine 'S' þeklinde kavisli çarpýþma kolu ekleyerek yük daðýlýmýnýn iyileþtirilmesi

Bu çalýþmada, “S” þeklinde bir çarpýþma kolu ile güçlendirilmiþ, aracýn ön çarpýþma bölgesinin performansý, klasik düz çarpýþma kolununki ile karþýlaþtýrýlmýþtýr. Araçtaki çok yönlü ve sürekli yük yollarýný elde etmek amacýyla önden çarpma senaryosu Hyperworks – Optistruct yazýlýmý ile oluþturulmuþ ve aracýn topoloji optimizasyonu gerçekleþtirilmiþtir. Elde edilen yük yollarý baz alýnarak araç ön çarpýþma bölgesi elemanlarý Siemens NX yazýlýmý ile tasarlanmýþtýr. Ön çarpýþma bölgesi elemanlarýnýn malzeme tanýmlarý, baðlantý bölgeleri ve kabuk eleman yapýlarý Altair Hypermesh yazýlýmý ile oluþturulmuþ ve böylece ön iþlem prosesi tamamlanmýþtýr. Klasik düz çarpýþma koluna sahip ön çarpýþma bölgesi ile “S” þeklindeki çarpýþma koluyla güçlenedirilmiþ ön çarpýþma bölgesini karþýlaþtýrmak amacýyla iki farklý ön çarpýþma bölgesi modeli oluþturulmuþ ve çözümü için Abaqus yazýlýmý kullanýlmýþtýr. Simülasyonlardan, her bir model tarafýndan sönümlenen enerji miktarý, oluþan toplam deplasman, yolcu kabinine iletilen yük miktarý ve çarpýþma kuvveti verimliliði (CFE) sonuçlarý elde edilmiþtir.