Numerical and Experimental Investigation of Bending Behavior of Pre- Stressed Aluminum Tube

The effect of the pre-stress and internal Pa6 (cast-polyamide) material on the bending behavior of the aluminum tube is investigated experimentally. Finite element studies have been carried out to better understand the effect of pre-stress on the cross-section of tube and to shed light on the experimental studies. From the simulation studies, it was concluded that the effect of the pre-stress on the load carrying capacity of the tube is limited. After finite element studies, experimental studies were performed. In experimental studies, the lower cross-section of the tube was subjected to 175 MPa stress corresponding to 93% of the yield strength of the material. The tensile stress in the tube during the loading is reduced by applying pressure to the lower cross section of the tube beam. In addition, a change in the load carrying capacity of the tube was investigated using a Pa6 ring to delay local buckling. As a result of the experiments, it was found that the pre-stress significantly improved the bending behavior of the tube in the elastic region, while reducing buckling displacement. Application of both pre-stress and internally reinforcement enhanced bending performance of the tube in both elastic and plastic regions. Load carrying capacity of pre-stressed and internally reinforced tube was increased 1.67 times according to the base tube.

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