Testing a Flat Plate of PLA Plastic Made by 3D Printing for Deformability

The article describes the test of a flat plate made of PLA plastic, made by the method of 3D printing, for deformability. An analysis of available scientific research related to constructions made by the 3D printing method was carried out. To solve the research problem, a prototype of a flat plate was made from PLA plastic using 3D printing technology. For conducting experimental studies, a device was developed to test the plate sample under study. To determine the calculated values of displacements, a calculated finite-element model of a flat plate made of PLA plastic was created in the PC “LIRA-SAPR”. The calculation model of the plate consisted of typical finite elements and nodes. The conducted experiment made it possible to obtain the results of the study of the plate for bending, namely the deflection of the plate. According to the results of the experimental study, graphs of vertical movements were constructed, taking into account all stages of loading. The analysis of the obtained results made it possible to establish that the strength of the plate made of PLA plastic is ensured at deflections that significantly exceed the permissible values. A comparison of the experimental values with the calculated values was carried out and a good convergence of the results was obtained.