Diseño y construción de una máquina para ensayos de resistencia a la fatiga mecánica por flexión en probetas de polímeros impresos en 3D

Abstract

In this titling work, the objective of designing a machine for testing resistance to mechanical fatigue by rotary bending was set and its subsequent construction with the low-cost modality to test in specimens based on 3D-printed polymers using source materials for the benefit of the students who carry out the practices in the Materials Mechanics Laboratory of the ESPOCH, for which investigations were analyzed where it is mentioned that for this application it is essential to carry out the design of the subsystems that intervene in the development of the Machine such as the mechanical, electrical and electronic one that is mainly composed of an electric motor, bearings coupled to bearings, thermoset couplings, clamps, shafts, plates and a structure that supports the loads to be applied in addition to the respective dead weights. Continuing with the next phase, which was the construction of the structure based on the original characteristics of the design of the selected machine, in addition to the implementation of the different electronic control elements, it must be taken into account that all the elements were manufactured and then assembled following design specifications and industrial safety standards. As a final result, once the construction of the machine is carried out, it is possible to study in a better way the Science and Resistance of materials in laboratory practices, which suggests the use of test tubes based on the ASTM D671 standard, where the standards to follow for this type of test, so it is recommended to comply with an adequate indicative and conservative preventive maintenance plan in order to guarantee the operation of the machine, lengthening its useful life and carrying out a more strict study regarding mechanical vibrations.