泡沫铝填充薄壁圆管的三点弯曲实验的数值模拟

泡沫金属填充薄壁结构的应用日趋广泛,建立合理的数值计算模型对结构设计和工程应用非常重要.该文通过对泡沫铝填充薄壁铝合金圆管的三点弯曲实验的数值模拟,研究了它的力学行为.采用ABAQUS软件,建立了空管和泡沫铝全填充管的有限元模型,并对这两种结构在三点弯曲下的力学行为进行了数值模拟,所得结果与实验结果符合得较好.通过数值模拟分析了结构的承载机理和不同压头直径对结构承载能力的影响.此外,还研究了泡沫铝部分填充圆管的三点弯曲行为,分析了不同填充长度对结构承载能力的影响.

NUMERICAL SIMULATION OF THREE-POINT BENDING EXPERIMRNETS OF THIN-WALLED CYLINDRICAL TUBES FILLED WITH ALUMINUM FOAM

Thin-walled structures with metallic foam filler have been applied more and more widely.It is of great importance to establish appropriate numerical models for their design and engineering application.In this paper,the mechanical behavior of thin-walled cylindrical aluminum alloy tube with aluminum foam filler is studied by simulating three-point bending experiments numerically.Finite element models of empty and fully foam-filled tubes are established and the three-point bending behavior of these structures is simulated with the use of ABAQUS software.The numerical results are in good agreement with those obtained experimentally.The mechanism of load-bearing capacity of the structure and the influence of the pressure head diameter on the load-bearing capacity are analyzed by numerical simulation.In addition,three-point bending behavior of partially foam-filed aluminum tubes is studied and the influence of the length of filled section is analyzed.