Lirio Schaeffer

SPIF of brass alloys: Preliminary studies

This article discusses the preliminary studies of the Single Point Incremental Forming (SPIF) process applied brass alloy Cu-35Zn, with different sheet thicknesses and formed geometries. Despite being a material widely used in industry, with excellent cold formability, there is still no relevant research on this material concerning SPIF. As a result of these preliminary studies, the necessary forces (F) during the process, the true strain (e1, e2) and maximum wall angle (ψ) supported by materials are presented and discussed.

LABCONM: A Remote Lab for Metal Forming Area

This paper aims to describe the LABCONM, that is an educational laboratory that provides remote access to one remote educational compression testing machine (MDTEC). This laboratory was developed specifically to help in the teaching/learning process of metal flow curves in the metal forming area. Two different types of analysis were defined to validate the laboratory, where the first one considerate the teaching approach and the second one the operation of the laboratory. In the technical analysis, the researchers conducted 20 remotely operated tests, where it was verified the quality and repeatability of the data to demonstrate metal flow. The data shown sufficient quality and repeatability, so that the MDTEC could be used as an educational experiment. In the pedagogical analysis, two classes, which were attending Metal Forming Course, participated. In the group that did not access the LABCONM, 17% of students had unsatisfactory result in the mathematical question. In the group that accessed to the LABCONM, 100% of the students had satisfactory or excellent result in the same question. Consequently, it was possible to conclude that there is an influence of laboratory especially for those students who have more difficulties in theoretical learning.

Dimensionamiento de tanques biorreactores mediante simulación computacional

The objective of this work is to optimize and scale a bioreactor. The design and choice of materials are essential aspects to ensure proper operation and performance of the plant for biogas generation. Computational tools can assist in the design and sizing of biogas plants. Computer simulations were performed to determine the minimum plate thickness of the bioreactor considering three types of steels: AISI 318, AISI 316 L y ASTM A36. The simulation of bioreactors for the design and for the choice of materials is done using the software CAE FEMAP NASTRAN 10.0.2. The results show that the optimum material is steel AISI 318 while the steels AISI 316 L y ASTM A36 presented a similar behavior during simulation.