Experimental and finite element simulation study of the mechanical behaviors of aluminum foam-filled single/double tubes

Abstract

Aluminum foam-filled tubes are complicated structures created by filling one or more thin-walled metal tubes with varying shapes in cross-sections with aluminum foam. We optimized the structure of aluminum foam-filled tubes using software simulation, compression, and three-point bending experiments. Filling aluminum foam not only improves the axial compressive performance and bending strength of the thin-walled metal tube but also eliminates the disadvantage of the low strength of the aluminum foam. The aluminum foam-filled single tube exhibited significant improvements in load-bearing and energy absorption, with a one-time increase in load-bearing and five times increase in energy absorption compared with an empty tube. The aluminum foam-filled single tube with a smaller diameter-to-thickness ratio has a higher load-bearing capacity. In contrast, the length-to-diameter ratio has a lower impact on load-bearing capacity. Once the filling length reaches the effective filling length, the structure can still support higher loads and effectively reduce its overall weight. The compression and bending properties in the double-tube structure filled with foam aluminum improved significantly compared with the empty tube and single-tube structure filled with aluminum foam. The total compressive energy absorption capacity in the double-tube structure filled with aluminum foam is 2.01 times that of the empty tube and 1.81 times that in the single-tube-filled structure. When the wall thickness of the filled stainless steel tube is 1.0 mm, the total bending energy absorption and the specific absorption energy of the aluminum foam-filled double tube structure are 1.5 and 2.1 times that of the corresponding aluminum foam-filled single tube, respectively.

Numerical and experimental investigations on AA6063 extrudates: effect of number of portholes on extrusion load and weld strength

“…Various researchers extensively worked on extrusion ratio, die angle, die profile optimization for solid dies such as streamline, Bezier curve, conical dies, bearing length modification etc for prediction of extrusion load, metal flow control during extrusion etc [11,12,14,17,19]. In this regard, researchers are now applying numerical simulations for prediction of load during extrusion of advanced materials such as Aluminium metal matrix components and foams etc [20,21]. Jayaseelan V et al [22] have conducted studies on cold extrusion of AA6063 metal matrix composite with 5% Silicon carbide mixture and compared loads obtained using various models with experimental loads for different extrusion ratios in a conical die.…”