Prof. Dr. Lirio Schaeffer
Universidade Federal do Rio Grande do Sul - UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
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Academic Career Length
34Years (1993-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications1 January 2019 in Journal of Materials Research and Technology
Journal Article
RSRafael Gustavo Schreiber
Rafael Gustavo SchreiberLirio Schaeffer30 January 2026 in Revista Multidisciplinar do Nordeste Mineiro
Journal Article
VBValtenês de Souza Bossle
Valtenês de Souza BossleLirio SchaefferMRMatheus Riffel
Matheus RiffelRRRafael Da Rocha
Rafael Da RochaJTJuliano Toniolo
Juliano TonioloHSLA S700MC and AHSS S900MC steels have been increasingly used to substitute conventional steels, and further understanding of mechanical behaviors is needed. This study aims to evaluate mathematical equations for calculating the True Strain in the outer fibers of the bending zone, Springback and Bending Force that occur in the Air Bending process for these two steels, using the analytic methods of calculation and computer simulation, comparing them to the results obtained by means of experimental analysis. Four punches were used, varying the distance between the die supports and the displacement of the punch for each one of them. Experimental analysis revealed different True Strain values in the outer fibers of the bending zone. However, despite the materials having distinct mechanical properties, the values obtained through analytical calculation methods were found to be the same for both steels. While the predictability of the Springback Factor through the analytical method varied from 0.5% to 6.5% and for Bending Force the variation was from 10.0% to 38.3%.
20 September 2024 in The International Journal of Advanced Manufacturing Technology
Journal Article
ARAndré Rosiak
André RosiakMSMurilo Schmeling
Murilo SchmelingRMRoderval Marcelino
Roderval MarcelinoLirio Schaeffer1 January 2019 in Matéria (Rio de Janeiro)
Journal Article
LFLuis Fernando Folle
Luis Fernando FolleLirio SchaefferFriction between the interface workpiece and tooling has considerable importance in sheet metal forming operations; an accurate description of the friction is necessary to analyze and design new workpieces and tooling. This work suggests a methodology to determine and evaluate the mean coefficient of friction (COF) using the Finite Element Method (FEM) through Dynaform for the aluminum alloy AA1100. The results indicate that this methodology is consistent with reality. It is also observed that the software tends to diverge from the measured results because the software considers the COF to be constant along the process. Despite this trend, the greatest distance between the maximum drawing force given by the measurement and the numeric simulation was not high: it was approximately 6%. Workpiece strain measurements were collected to compare with the numerical simulation results, and it was observed that they are generally in agreement.
4 August 2017 in International Journal of Material Forming
Journal Article
DFDaniel Fritzen
Daniel FritzenADAnderson Daleffe
Anderson Daleffe
GLGustavo Do Santos De Lucca
Gustavo Do Santos De Lucca
JCJovani Castelan
Jovani Castelan
Lirio Schaeffer
Ricardo Alves de Sousa1 April 2002 in Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
Journal Article
FHF C Haag
F C Haag
AGAlexandre F. Galio - Galio
Alexandre F. Galio - GalioLirio SchaefferSome cellular aluminium materials have been extensively developed and investigated in recent years. The potential for applying aluminium foams in lightweight construction is mainly based on the stiffness and impact absorption. Because of these characteristics, this work is based mainly on the uniaxial compression resistance of aluminium foam. The aluminium foam was formed with three different compaction presses to verify the influence on density and, subsequently, crushing resistance.
About Me
Mechanical Engineer, PhD in Metal Forming - Rheinisch-Westfälische Technische Hochschule (RWTH Aachen University), Aachen, Germany (1982). He began his academic career in 1976 as a Full Professor in the Department of Metallurgy at the Federal University of Rio Grande do Sul (UFRGS). In 2025, he was awarded the title of Professor Emeritus of UFRGS. Currently, as a Visiting Professor at UFRGS, he coordinates the Research Group on Innovation in Metal Forming (CBCM), working mainly in the following areas: Forging, Stamping, Powder Metallurgy, Biomedical Materials, Additive Manufacturing, and Materials/Processes for Renewable Energy. He currently serves as an ad hoc consultant for the Research Support Foundation of the State of Rio Grande do Sul (FAPERGS) and the Coordination for the Improvement of Higher Education Personnel (CAPES), as a consultant for the National Council for Scientific and Technological Development (CNPq), Researcher 1A category, and as a consultant for the Research Support Foundation of the State of Rio de Janeiro (FAPERJ). In 1998, he received the Outstanding Researcher of Rio Grande do Sul Award from FAPERGS. He has supervised 168 Master's dissertations and 62 doctoral theses. He has published more than 500 international articles in technical journals.