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- 저자 : Seyed Mohammad Hossein Mirbagheri (검색결과 1 건)
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Youssef Taraz Jamshidi,Ali Pourkamali Anaraki,Mojtaba Sadighi,Javad Kadkhodapour,Seyed Mohammad Hossein Mirbagheri,Behnaz Akhavan 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.5
Foam filled tubes (FFT) are novel structures with high energy absorption, enhanced strength to weight ratio, and tailoringcapability. In the present paper, we have analyzed quasi-static uniaxial compression and low-velocity impact behavior of FFTwith closed-cell metallic foam cores and functionally graded densities both experimentally and numerically. Alporas foamswere manufactured using liquid state method with TiH2blowing agent. We prepared Specimens with graded compositionand densities by stacking of several layers of pure aluminum and A356 alloy Alporas foams with cubic geometry. We conductedseveral standard uniaxial compression experiments to determine the non-linear mechanical properties and hardening.Square aluminum tubes are manipulated to enhance the performance and tailoring specification of the structure. We generatedmicrostructural models using a hybrid 3D Voronoi diagram and CT-scan images to predict mechanical behavior numerically.Computed tomography is used to determine the inner cells morphological characterization. Also, the modified Kelvin cellwith a beam element in edge regions is manipulated to enhance accuracy. Comparing the quasi-static experiment and FEAresults show good accordance, and hence, we achieved the calibrated model. Finally, we used the numerical model in FFTtailoring and mechanical properties design.
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