Buckling Behavior Of Tubular Parts Made of Polylactic Acid

The development of 3D printing technologies allows the production of bars made of polymeric materials with equal areas of annular cross-sections. In this way, it becomes possible to establish a better justified determination of the dimensions of the cross-sections of the parts subject to buckling, for the same consumption of material required for the manufacture of the parts. The actual values of the stresses at which the tubular test samples of polymeric material fail are determined by experimental compression tests of the bars, carried out on a universal tensile-compression testing machine. The results are mathematically processed allowing the determination of a mathematical model that highlights the intensity of the influence exerted by the diametral dimensions of the cross-sections of equal areas on the buckling yield stress values in the case of tubular polylactic acid test samples manufactured by 3D printing.