Tensile Strength Analysis of the Ring-Shape 3D Printed Polymer Parts

The uses of polymers in various fields are no longer a novelty. The diversity of these uses started from the study of polymers' properties, which revealed the ability of these materials to meet the different requirements to which the polymer parts are subjected in real use. Tensile strength is one of the basic requirements that can highlight the strength and use properties. The polymer's choice and the way to generate certain stresses in the polymer parts highlight some interesting aspects of using 3D printing to make parts with a certain geometry. Thus, ring-type parts made of polylactic acid and with a constant cross-section suppose a certain distribution of efforts in the case of mechanical stresses, such as tensile stress. The finite element simulation method is used to highlight the tensile behavior of ring-type parts made of the polymer by 3D printing. Experimental tests are also performed to highlight the influence of some input factors in the 3D printing process on tensile strength. An empirical mathematical model has been identified to illustrate the influence of input factors used on the tensile strength of the test piece material. The experimental research also allows a comparison of the results with those obtained by using the finite element method.