Study on the Mechanical Properties of Aluminum Foam Filled Pipe Based on Melt Foaming Method
The closed-cell aluminum foam was prepared by melt foaming method,and the effect of aluminum foam filling density on the compression and energy absorption performance of aluminumalloy thin-walled tubes was studied,and the optimal density parameters were determined by comparing the lifting effect.On the basis of the optimal density,three types of composite structures with different cross-sections were designed,and the influence of the composite structure of the filled tube on the compressive properties and energy absorption properties was studied,and the optimal structural parameters were determined.In the experiment,a universal testing machine was used to carry out quasi-static compression experiments,and the finite element simulation results were compared with the test results to verify the accuracy of the data.The results showed that the gradient aluminum foam increased the mechanical properties of the thin-walled tube,such as yield strength,average crushing load and energy absorption performance,and reduced the curve fluctuation,and the closed-cell aluminum foam with a density of 0.480 5 g/cm3 showed the best results.In the secondary test,the composite structure further improved the mechanical properties of the thin-walled tube,and the composite structure of the outer tube and the inner round tube had the highest yield strength,average crushing load and energy absorption effect.
aluminum foamthin-walled metal pipescompressperformancecomposite structuresenergy absorption
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