Mauro Hugo Mathias

@feg.unesp.br

Associate Professor/ Departamneto de Mecânica
Faculdade de Engenharia e Ciências - Campus de Guaratingueta/ UNESP

Mauro Hugo Mathias


            Download Compact PDF  
https://researchid.co/mhmathias39
Dr. Mauro Hugo Mathias is an Associate Professor in the Department of Mechanical Engineering at the Faculty of Engineering and Sciences, São Paulo State University (UNESP), Guaratinguetá campus. He earned his Bachelor’s degree (1982) and Master’s degree (1989) in Mechanical Engineering from UNESP, and his Ph.D. in Mechanical Engineering (1998) from the University of Campinas (UNICAMP).
In 2007, he was awarded the title of Senior Lecturer in Dynamics by UNESP. His research and teaching activities focus on Mechanical Engineering, with particular emphasis on the dynamics of rigid, elastic, and plastic bodies. His main areas of expertise include predictive maintenance, signal processing, machine condition monitoring, and vibration analysis.
Since 2022, he has served as the Coordinator of the Human Resources Training Program PRH-34.1 (ANP/FAPESP/FINEP) and as the Coordinator of the Guaratinguetá Innovation Center (CIG).

RESEARCH, TEACHING, or OTHER INTERESTS

Mechanical Engineering
31

Scopus Publications

Scopus Publications

  • O&G, Geothermal Systems, and Natural Hydrogen Well Drilling: Market Analysis and Review
    Andreas Nascimento, Diunay Zuliani Mantegazini, Mauro Hugo Mathias, Matthias Reich, Julian David Hunt
    Energies, 2025
    Developing clean and renewable energy instead of the ones related to hydrocarbon resources has been known as one of the different ways to guarantee reduced greenhouse gas emissions. Geothermal systems and native hydrogen exploration could represent an opportunity to diversify the global energy matrix and lower carbon-related emissions. All of these natural energy sources require a well to be drilled for its access and/or extractions, similar to the petroleum industry. The main focuses of this technical–scientific contribution and research are (i) to evaluate the global energy matrix; (ii) to show the context over the years and future perspectives on geothermal systems and natural hydrogen exploration; and (iii) to present and analyze the importance of developing technologies on drilling process optimization aiming at accessing these natural energy resources. In 2022, the global energy matrix was composed mainly of nonrenewable sources such as oil, natural gas, and coal, where the combustion of fossil fuels produced approximately 37.15 billion tons of CO2 in the same year. In 2023, USD 1740 billion was invested globally in renewable energy to reduce CO2 emissions and combat greenhouse gas emissions. In this context, currently, about 353 geothermal power units are in operation worldwide with a capacity of 16,335 MW. In addition, globally, there are 35 geothermal power units under pre-construction (project phase), 93 already being constructed, and recently, 45 announced. Concerning hydrogen, the industry announced 680 large-scale project proposals, valued at USD 240 billion in direct investment by 2030. In Brazil, the energy company Petroleo Brasileiro SA (Petrobras, Rio de Janeiro, Brazil) will invest in the coming years nearly USD 4 million in research involving natural hydrogen generation, and since the exploration and access to natural energy resources (oil and gas, natural hydrogen, and geothermal systems, among others) are achieved through the drilling of wells, this document presents a technical–scientific contextualization of social interest.
  • Optimization of Rate of Penetration and Mechanical Specific Energy Using Response Surface Methodology and Multi-Objective Optimization
    Diunay Zuliani Mantegazini, Andreas Nascimento, Mauro Hugo Mathias, Oldrich Joel Romero Guzman, Matthias Reich
    Applied Sciences Switzerland, 2025
    Optimizing the drilling process is critical for the exploration of natural resources. However, there are several mechanic parameters that continuously interact with formation properties, hindering the optimization process. Rate of penetration (ROP) and mechanical specific energy (MSE) are considered two key performance indicators that allow the identification of ideal conditions to enhance the drilling process. Thus, the goal of this research was to analyze field data from pre-salt layer operations, using a 2D analysis of parameters as a function of depth, response surface methodology (RSM), and multi-objective optimization. The results show that the RSM method and multi-objective optimization provide better results when compared with 2D analysis of parameters as a function of depth. The RSM method can be used as a tool to analyze the effects of the independent drilling mechanical parameters (WOB, RPM, FLOW, and TOR) on the response variables (ROP and MSE) with a 95% confidence level. Through multi-objective optimization, it was possible to concomitantly achieve an ROP of approximately 22 ft/h and MSE of nearly 11 kpsi using the values of WOB, RPM, FLOW, and TOR of about 11 klb, 109 rev/min, 803 gpm, and 3 klb-ft, respectively. Using high WOB values, i.e., from the mean value up to the maximum value of approximately 43 klb, reflects a low ROP and most likely indicates an operation beyond the foundering point. High FLOW promotes a more efficient hole cleaning and higher rates of cuttings transport, thus preventing eventual in situ drill-bit sticking. Flow adjustment also ensures an adequate balance of dynamic bottom hole pressure, in addition to controlling the force impact force of the drilling fluid in contact with the rock being drilled, expressing importance in terms of efficiency and rock penetration. Finally, it is important to mention that the results of this research are not only applicable to hydrocarbon exploration but also to geothermal and natural hydrogen exploration. Values analyzed and presented with decimal precision should be logically focused as integers when in industrial application.
  • Analysis of the Sugarcane Biomass Use to Produce Green Hydrogen: Brazilian Case Study
    Gustavo Henrique Romeu da Silva, Andreas Nascimento, Diego Nascimento, Julian David Hunt, Mauro Hugo Mathias
    Applied Sciences Switzerland, 2025
    Conventional hydrogen production processes, which often involve fossil raw materials, emit significant amounts of carbon dioxide into the atmosphere. This study critically evaluates the feasibility of using sugarcane biomass as an energy source to produce green hydrogen. In the 2023/2024 harvest, Brazil, the world’s largest sugarcane producer, processed approximately 713.2 million metric tons of sugarcane. This yielded 45.68 million metric tons of sugar and 29.69 billion liters of first-generation ethanol, equivalent to approximately 0.0416 liters of ethanol per kilogram of sugarcane. A systematic literature review was conducted using Scopus and Clarivate Analytics Web of Science, resulting in the assessment of 335 articles. The study has identified seven potential biohydrogen production methods, including two direct approaches from second-generation ethanol and five from integrated bioenergy systems. Experimental data indicate that second-generation ethanol can yield 594 MJ per metric ton of biomass, with additional energy recovery from lignin combustion (1705 MJ per metric ton). Moreover, advances in electrocatalytic reforming and plasma-driven hydrogen production have demonstrated high conversion efficiencies, addressing key technical barriers. The results highlight Brazil’s strategic potential to integrate biohydrogen production within its existing bioenergy infrastructure. By leveraging sugarcane biomass for green hydrogen, the country can contribute significantly to the global transition to sustainable energy while enhancing its energy security.
  • Comparison of the Accreditation Status of Energy and Environment Laboratories in Brazilian, Austrian, German, and Swiss Universities
    International Journal of Engineering Education, 2025
  • Renewable energy perspectives: Brazilian case study on green hydrogen production
    Gustavo Henrique Romeu da Silva, , Andreas Nascimento, Christoph Daniel Baum, Nazem Nascimento, Mauro Hugo Mathias, Mohd Amro, , and
    Aims Energy, 2025
    Hydrogen is recognized as a key component of the future renewable energy landscape. It can be sourced from diverse raw materials, including water, bioethanol, and microalgae. Despite its potential, challenges remain regarding its cost-effectiveness, infrastructure development, and integration into existing energy systems. This study evaluated Brazil's renewable energy production, focusing on resource availability, economic feasibility, technological challenges, and regulatory factors. Data from international energy agencies were analyzed using statistical indicators to compare Brazil's green hydrogen potential with global benchmarks. Findings indicate that Brazil's electrical matrix—comprising hydropower (59%), wind (13.2%), and solar (7%)—offers favorable conditions for large-scale green hydrogen generation. However, high production costs remain a limiting factor due to technological constraints, infrastructure gaps, and policy uncertainties. The results highlight Brazil's strong potential to become a key player in the green hydrogen market, provided that technological advancements, cost reductions, and regulatory frameworks evolve to support large-scale implementation. The study emphasizes the need for targeted investments, government incentives, and energy storage solutions to enhance Brazil's competitiveness in the global energy transition.
  • Analysis and Multi-Objective Optimization of the Rate of Penetration and Mechanical Specific Energy: A Case Study Applied to a Carbonate Hard Rock Reservoir Based on a Drill Rate Test Using Play-Back Methodology
    Diunay Zuliani Mantegazini, Andreas Nascimento, Vitória Felicio Dornelas, Mauro Hugo Mathias
    Applied Sciences Switzerland, 2024
    Until early 2006, in Brazil, the focus used to be on oil and gas exploration/exploitation of post-salt carbonates. This changed when the industry announced the existence of large fields in pre-salt layers across the South Atlantic Ocean from nearshore zones up to almost 350 [km] from the shore. With the discovery of pre-salt hydrocarbons reservoirs, new challenges appeared. One of the main challenges is the necessity to optimize the drilling processes due to their high operational costs. Drilling costs are considerably high, which leads the oil and gas industry to search for innovative and entrepreneurial methods. The coupling of the mechanical specific energy (MSE) and the rate of penetration (ROP) is a method that allows for the identification of ideal conditions to efficiently enhance the drilling process. In addition, the performance of the drilling process can be estimated through pre-operational tests, which consist in continuously testing the applied drilling mechanic parameters, such as the weight-on-bit (WOB) and drill string rotary speed (RPM), looking for optimum sets that would ultimately provide the most desirable ROP. Thus, the goal of this research was to analyze field data from pre-salt layer operations, using a multi-objective optimization based on the play-back methodology for pre-operational drilling tests, through the ideal combination of the highest ROP and the lowest MSE. The results showed that the new concept of pre-operational tests based on the MSE proved to be effective in the drilling process optimization. The combination of the highest ROP and the lowest MSE allows for a high-performance drilling process. For WOB intervals of 5 and 7 [klb], a good fit of the parameters was obtained. Through the parameters obtained from pre-operational tests, the eventual cost-saving and time-saving values could be estimated, respectively, ranging from USD 1,056,180 to 1,151,898 and 19.50 to 21.27 [h], respectively. In addition, the results of this research can be applied to the exploration of other natural resources, such as natural hydrogen and geothermal sources.
  • Renewable Energy Potentials and Roadmap in Brazil, Austria, and Germany
    Gustavo Henrique Romeu da Silva, Andreas Nascimento, Christoph Daniel Baum, Mauro Hugo Mathias
    Energies, 2024
    The emerging energy transition is particularly described as a move towards a cleaner, lower-carbon system. In the context of the global shift towards sustainable energy sources, this paper reviews the potential and roadmap for hydrogen energy as a crucial component of the clean energy landscape. The primary objective is to present a comprehensive literature overview, illuminating key themes, trends, and research gaps in the scientific discourse concerning hydrogen production and energy policy. This review focuses particularly on specified geographic contexts, with an emphasis on understanding the unique energy policies related to renewable energy in Brazil, Austria, and Germany. Given their distinct social systems and developmental stages, this paper aims to delineate the nuanced approaches these countries adopt in their pursuit of renewable energy and the integration of hydrogen within their energy frameworks. Brazil exhibits vast renewable energy potential, particularly in wind and solar energy sectors, positioning itself for substantial growth in the coming years. Germany showcases a regulatory framework that promotes innovation and technological expansion, reflecting its highly developed social system and commitment to transitioning away from fossil fuels. Austria demonstrates dedication to decarbonization, particularly through the exploration of biomethane for residential heating and cooling.
  • Numerical and experimental evaluation of hydrodynamic bearings applied to a Jeffcott test bench
    Everton C. Medeiros, Airton Nabarrete, Marcela A. Cruchaga, Willy R. P. Mendonca, Mauro H. Mathias
    International Journal of Acoustics and Vibrations, 2021
    Merging analytical and numerical models with experimental results improve the behaviour predictions of mechanical elements applied to rotor machinery, such as the bearings. This work aims to present the design of a hydrodynamic bearing prototype, a comparison and validation between the numerical and experimental results of critical speeds, and the differences of behaviour when the bush geometries and lubrication are changed. The bush geometries and the fluid film properties are analysed by measuring the dynamic behaviour of a rotor supported by these bearings. The experimental evaluation is based on measuring the Jeffcott test bench supported in a pair of bearings, showing the anisotropic behaviour caused by the stiffness difference in horizontal and vertical directions. It also presents an optimization of bushings for isotropic conditions when they were changed for different geometries (elliptical, offset halves) and different materials with boundary lubrication. This detailed study shows how the dynamic behaviour of rotating machinery can be predicted using numerical models and its validation by a test rig. Results also show how the vibration occurs if the bushes geometries are modified or its lubrication condition is changed.
  • Machine learning methods applied to drilling rate of penetration prediction and optimization - A review
    Luís Felipe F.M. Barbosa, Andreas Nascimento, Mauro Hugo Mathias, João Andrade de Carvalho
    Journal of Petroleum Science and Engineering, 2019
  • Design and evaluation of a research-educational test bench applied to rotor dynamics studies
    Everton Coelho de Medeiros, Willy Roger de Paula Mendonca, Everaldo de Barros, Mauro Hugo Mathias
    IEEE Latin America Transactions, 2018
    The rotor dynamics study is critical in the design of rotating machinery. The dynamic modeling of rotors aims to estimate the operating condition of rotating machinery through the evaluation of parameters related to the critical velocity and responses to unbalance. The application of small-scale test bench and the development of dedicated experimental procedures are important for the grounding of complex rotating high power machines behavior phenomena. The experimental evaluation is an important validation of theoretical models, such as those obtained by analytical and numerical models. This work aims the description of an experimental test bench, and later were the object of study to be modeled in several conditions: using analytical, numerical and experimental methods. In the end, with all these results, there is a comparative assessment of the modeling and validation of equipment.
  • The dynamic analysis of rotors mounted on composite shafts with internal damping
    Willy Roger De Paula Mendonça, Everton Coelho De Medeiros, Artur Luiz Rezende Pereira, Mauro Hugo Mathias
    Composite Structures, 2017
  • Reverse Engineering: A New Well Monitoring and Analysis Methodology Approaching Playing-Back Drill-Rate Tests in Real-Time for Drilling Optimization
    Andreas Nascimento, Asad Elmgerbi, Abbas Roohi, Michael Prohaska, Gerhard Thonhauser, José Luiz Gonçalves, Mauro Hugo Mathias
    Journal of Energy Resources Technology Transactions of the ASME, 2017
  • A low cost data acquisition system for measuring shock
    E. de Barros, A. N. Campos, F. R. Silveira, L. R. de Camargo, M. H. Mathias
    IEEE Latin America Transactions, 2016
  • Experimental observation of nonlinear vibrations using a closed-loop vibration system
    Everaldo de Barros, Carlos d’Andrade Souto, Mauro Hugo Mathias
    Metrology and Measurement Systems, 2015
  • Condition-based monitoring system for rolling element bearing using a generic multi-layer perceptron
    Luis F de Almeida, José WP Bizarria, Francisco CP Bizarria, Mauro H Mathias
    JVC Journal of Vibration and Control, 2015
  • Rotor failure detection of induction motors by wavelet transform and Fourier transform in non-stationary condition
    Cesar da Costa, Masamori Kashiwagi, Mauro Hugo Mathias
    Case Studies in Mechanical Systems and Signal Processing, 2015
  • Application of a computer sound card for measurement of mechanical vibrations
    Everaldo de Barros, Carlos d'Andrade Souto, Leandro Ribeiro de Camargo, Mauro Hugo Mathias
    Revista Brasileira De Ensino De Fisica, 2015
  • Mathematical Modeling Applied to Drilling Engineering: An Application of Bourgoyne and Young ROP Model to a Presalt Case Study
    Andreas Nascimento, David Tamas Kutas, Asad Elmgerbi, Gerhard Thonhauser, Mauro Hugo Mathias
    Mathematical Problems in Engineering, 2015
  • Dynamic Drill-rate Test Approach Appplied to a Pre-salt Case Study
    A. Nascimento, A. Elmgerbi, A. Roohi, M. Prohaska, G. Thonhauser, M. H. Mathias
    SPE Latin American and Caribbean Petroleum Engineering Conference Proceedings, 2015
  • Maximization of the signal impulsiveness combining envelope technique with minimum entropy deconvolution
    Rafael José Gomes de Oliveira, Mauro Hugo Mathias
    Applied Mechanics and Materials, 2013
  • A tool for controlling accelerometers. Secondary calibration data
    Fernando Juliani, Everaldo de Barros, Mauro Hugo Mathias
    Comptes Rendus Mecanique, 2013
  • Time-frequency analysis combining wavelets and the envelope technique for fault identification in rotary machines
    Rafael José Gomes de Oliveira, Valdeci Donizete Gonçalves, Everton Coelho de Medeiros, Mauro Hugo Mathias
    Advanced Materials Research, 2013
  • Design of a labVIEW system applied to predictive maintenance
    Mauro Hugo Mathias, Everton Coelho de Medeiros, Valdeci Donizete Gonçalves
    Applied Mechanics and Materials, 2013
  • Development of an instrumentation system embedded on FPGA for real time measurement of mechanical vibrations in rotating machinery
    Cesar da Costa, Mauro Hugo Mathias, Masamori Kashiwagi
    Proceedings 2012 International Symposium on Instrumentation and Measurement Sensor Network and Automation Imsna 2012, 2012
  • Development of diagnosis system for rolling bearings faults on real time based on FPGA
    M. Kashiwagi, C. da Costa, M. H. Mathias
    Renewable Energy and Power Quality Journal, 2012
  • A new approach for real time fault diagnosis in induction motors based on vibration measurement
    Cesar da Costa, Mauro Hugo Mathias, Pedro Ramos, Pedro Silva Girao
    2010 IEEE International Instrumentation and Measurement Technology Conference I2mtc 2010 Proceedings, 2010
  • Wear particle classifier system based on an artificial neural network
    Strojniski Vestnik Journal of Mechanical Engineering, 2010
  • A mechatronic system applied to wear particle analysis
    Tribologia, 2008
  • Proposal of architecture for launcher systems of unguided sounding rockets
    Alexandre Garcia, Mauro Hugo Mathias, Francisco Carlos Parquet Bizarria
    SAE Technical Papers, 2006
  • A contribution for nonlinear structural dynamics characterization of cantilever beams
    International Congress on Noise Control Engineering 2005 Internoise 2005, 2005
  • Considerations in light truck suspension design
    Mauro Hugo Mathias, José Eduardo Michelini, Marli La Selva, Luiz Henrique Baptista, José Augusto Pagan
    SAE Technical Papers, 2000