Experimental Study on the Influence of Stress Concentration on the Flexural Stability of Aluminum Hollow Tube

Solid sections are gradually replaced by the hollow in most of structural applications various engineering fields due to their attracting features such as light-weight and high specific strength. In present investigation, one attempt was made investigate detail about flexural capability an aluminum tube (AHT) with square cross section. The objective investigation is study influence stress concentration on behavior tube. type considered through hole different section quantity. Three-point bending test concentrated load conducted specimens types circular hole, perforations. applied manually during test. carried out all for support span 110, 130, 170 200 mm respectively. output measures maximum load, deflection stiffness. capacity around 5.7 kN observed AHT 90 mm. measured at mid beam increases rapidly when aspect ratio from 73.33 93.33, whereas after which variation marginal increase 113.33 133.33. This effect spring back, dominates more behaviour shorter between supports