This page has only limited features, please log in for full access.
The replacement of synthetic fibers by natural fibers has, in recent decades, been the subject of intense research, particularly as reinforcement of composites. In this work, the lesser known tucum fiber, extracted from the leaves of the Amazon Astrocaryum vulgare palm tree, is investigated as a possible novel reinforcement of epoxy composites. The tucum fiber was characterized by pullout test for interfacial adhesion with epoxy matrix. The fiber presented a critical length of 6.30 mm, with interfacial shear strength of 2.73 MPa. Composites prepared with different volume fractions of 20 and 40% tucum fiber were characterized by tensile and Izod impact tests, as well as by ballistic impact energy absorption using .22 ammunition. A cost analysis compared the tucum fiber epoxy composites with other natural and synthetic fiber reinforced epoxy composites. The results showed that 40 vol% tucum fiber epoxy composites increased the tensile strength by 104% and the absorbed Izod impact energy by 157% in comparison to the plain epoxy, while the ballistic performance of the 20 vol% tucum fiber composites increased 150%. These results confirmed for the first time a reinforcement effect of the tucum fiber to polymer composites. Moreover, these composites exhibit superior cost effectiveness, taking into account a comparison made with others epoxy polymer composites.
Michelle Souza Oliveira; Fernanda Santos Da Luz; Andressa Teixeira Souza; Luana Cristyne Da Cruz Demosthenes; Artur Camposo Pereira; Fabio Da Costa Garcia Filho; Fábio De Oliveira Braga; André Ben-Hur Da Silva Figueiredo; Sergio Neves Monteiro. Tucum Fiber from Amazon Astrocaryum vulgare Palm Tree: Novel Reinforcement for Polymer Composites. Polymers 2020, 12, 2259 .
AMA StyleMichelle Souza Oliveira, Fernanda Santos Da Luz, Andressa Teixeira Souza, Luana Cristyne Da Cruz Demosthenes, Artur Camposo Pereira, Fabio Da Costa Garcia Filho, Fábio De Oliveira Braga, André Ben-Hur Da Silva Figueiredo, Sergio Neves Monteiro. Tucum Fiber from Amazon Astrocaryum vulgare Palm Tree: Novel Reinforcement for Polymer Composites. Polymers. 2020; 12 (10):2259.
Chicago/Turabian StyleMichelle Souza Oliveira; Fernanda Santos Da Luz; Andressa Teixeira Souza; Luana Cristyne Da Cruz Demosthenes; Artur Camposo Pereira; Fabio Da Costa Garcia Filho; Fábio De Oliveira Braga; André Ben-Hur Da Silva Figueiredo; Sergio Neves Monteiro. 2020. "Tucum Fiber from Amazon Astrocaryum vulgare Palm Tree: Novel Reinforcement for Polymer Composites." Polymers 12, no. 10: 2259.
Composites reinforced with natural lignocellulosic fibers (NLFs) are gaining relevance as the worldwide demand for renewable and sustainable materials increases. To develop novel natural composites with satisfactory properties, less common NLFs should also be investigated. Among these, the Cyperus malaccensis (CM), a type of sedge fiber, is already used in simple items like ropes, furniture, and paper, but has not yet been investigated as composite reinforcement for possible engineering applications. Therefore, the present work evaluated for the first time the properties of novel epoxy composites incorporated with 10, 20, and 30 vol.% of CM sedge fibers. Tensile, Izod-impact, and ballistic impact tests were performed, as well as Fourier transform infrared (FT-IR) spectroscopy and thermal analysis of the composites. Results disclosed a decrease (−55%) in tensile strengths as compared to the neat epoxy. However, the elastic modulus of the 30 vol.% sedge fiber composite increased (+127%). The total strain and absorbed ballistic energy did not show significant variation. The Izod impact energy of the 30 vol.% composite was found to be 181% higher than the values obtained for the neat epoxy as a control sample. An increase in both stiffness and toughness characterized a reinforcement effect of the sedge fiber. The thermal analysis revealed a slight decrease (−15%) in the degradation temperature of the CM sedge fiber composites compared to the neat epoxy. The glass-transition temperatures were determined to be in the range of 67 to 81 °C.
Lucas De Mendonça Neuba; Raí Felipe Pereira Junio; Matheus Pereira Ribeiro; Andressa Teixeira Souza; Eduardo De Sousa Lima; Fábio Da Costa Garcia Filho; André Ben-Hur Da Silva Figueiredo; Fábio De Oliveira Braga; Afonso Rangel Garcez De Azevedo; Sergio Neves Monteiro. Promising Mechanical, Thermal, and Ballistic Properties of Novel Epoxy Composites Reinforced with Cyperus malaccensis Sedge Fiber. Polymers 2020, 12, 1776 .
AMA StyleLucas De Mendonça Neuba, Raí Felipe Pereira Junio, Matheus Pereira Ribeiro, Andressa Teixeira Souza, Eduardo De Sousa Lima, Fábio Da Costa Garcia Filho, André Ben-Hur Da Silva Figueiredo, Fábio De Oliveira Braga, Afonso Rangel Garcez De Azevedo, Sergio Neves Monteiro. Promising Mechanical, Thermal, and Ballistic Properties of Novel Epoxy Composites Reinforced with Cyperus malaccensis Sedge Fiber. Polymers. 2020; 12 (8):1776.
Chicago/Turabian StyleLucas De Mendonça Neuba; Raí Felipe Pereira Junio; Matheus Pereira Ribeiro; Andressa Teixeira Souza; Eduardo De Sousa Lima; Fábio Da Costa Garcia Filho; André Ben-Hur Da Silva Figueiredo; Fábio De Oliveira Braga; Afonso Rangel Garcez De Azevedo; Sergio Neves Monteiro. 2020. "Promising Mechanical, Thermal, and Ballistic Properties of Novel Epoxy Composites Reinforced with Cyperus malaccensis Sedge Fiber." Polymers 12, no. 8: 1776.
Knowledge about the curing behavior of a thermosetting resin and its composites includes the determination of kinetic parameters and constitutes an important scientific and technological tool for industrial process optimization. In the present work, the differential scanning calorimetry (DSC) technique was used to determine several curing parameters for pure epoxy and its composite reinforced with 20 vol % mallow fibers. Analyses were performed with heating rates of 5, 7.5, and 10 °C/min, as per the ASTM E698 standard. The kinetic related parameters, that is, activation energy (E), Avrami’s pre-exponential factor (Z), and mean time to reach 50% cure (t½), were obtained for the materials, at temperatures ranging from 25 to 100 °C. Response surfaces based on the mathematical relationship between reaction time, transformed fraction, and temperature were provided for optimization purposes. The results showed that the average curing time used for the production of diglycidyl ether of bisphenol A/triethylenetetramine (DGEBA/TETA) epoxy systems or their composites reinforced with natural mallow fibers can be considerably reduced as the temperature is increased up to a certain limit.
Lucio Fabio Cassiano Nascimento; Fernanda Santos Da Luz; Ulisses Oliveira Costa; Fábio De Oliveira Braga; Édio Pereira Lima Júnior; Sergio Monteiro. Curing Kinetic Parameters of Epoxy Composite Reinforced with Mallow Fibers. Materials 2019, 12, 3939 .
AMA StyleLucio Fabio Cassiano Nascimento, Fernanda Santos Da Luz, Ulisses Oliveira Costa, Fábio De Oliveira Braga, Édio Pereira Lima Júnior, Sergio Monteiro. Curing Kinetic Parameters of Epoxy Composite Reinforced with Mallow Fibers. Materials. 2019; 12 (23):3939.
Chicago/Turabian StyleLucio Fabio Cassiano Nascimento; Fernanda Santos Da Luz; Ulisses Oliveira Costa; Fábio De Oliveira Braga; Édio Pereira Lima Júnior; Sergio Monteiro. 2019. "Curing Kinetic Parameters of Epoxy Composite Reinforced with Mallow Fibers." Materials 12, no. 23: 3939.
Fábio De Oliveira Braga; Michelle Souza Oliveira; Sergio Neves Monteiro; Edio Pereira Lima Jr.. METODOLOGIA DOE PARA COMPARAÇÃO DE BLINDAGENS COMPÓSITAS COM DIFERENTES ESPESSURAS DE CAMADA. ABM Proceedings 2019, 1 .
AMA StyleFábio De Oliveira Braga, Michelle Souza Oliveira, Sergio Neves Monteiro, Edio Pereira Lima Jr.. METODOLOGIA DOE PARA COMPARAÇÃO DE BLINDAGENS COMPÓSITAS COM DIFERENTES ESPESSURAS DE CAMADA. ABM Proceedings. 2019; ():1.
Chicago/Turabian StyleFábio De Oliveira Braga; Michelle Souza Oliveira; Sergio Neves Monteiro; Edio Pereira Lima Jr.. 2019. "METODOLOGIA DOE PARA COMPARAÇÃO DE BLINDAGENS COMPÓSITAS COM DIFERENTES ESPESSURAS DE CAMADA." ABM Proceedings , no. : 1.
The curaua fiber is one of the strongest natural lignocellulosic fibers and its non-woven fabric has potential for engineering applications. Recent investigation on multilayered armor systems (MAS) using natural fiber and fabric composites has shown promising results. In the present work, a MAS with front alumina ceramic followed by a curaua fabric-reinforced composite and backed by an Al alloy is investigated for the influence of the thickness/areal density of layers in the ballistic behavior of the armor. For the first time, an optimized thickness ratio for the layers is proposed. The Box-Behnken Design (BBD) and Multiple Regression Analysis (MRA) are applied to study the MAS properties and to improve the armors performance. Standard ballistic tests are performed, and the back-face signature (indentation in clay witness also known as trauma) is used as a measure of the MAS performance. The results reveal which is the most trauma absorptive layer, while the fracture mechanisms indicate the synergy between the layers. An optimized thickness ratio showed 56% reduction in the armor thickness compared to a fully aramid laminate armor as well as 8.8% reduction compared to the previous studied thickness ratio.
Fábio De Oliveira Braga; Pedro Henrique L.M. Lopes; Michelle Souza Oliveira; Sergio Neves Monteiro; Édio Pereira Lima. Thickness assessment and statistical optimization of a 3-layered armor system with ceramic front and curaua fabric composite/aluminum alloy backing. Composites Part B: Engineering 2018, 166, 48 -55.
AMA StyleFábio De Oliveira Braga, Pedro Henrique L.M. Lopes, Michelle Souza Oliveira, Sergio Neves Monteiro, Édio Pereira Lima. Thickness assessment and statistical optimization of a 3-layered armor system with ceramic front and curaua fabric composite/aluminum alloy backing. Composites Part B: Engineering. 2018; 166 ():48-55.
Chicago/Turabian StyleFábio De Oliveira Braga; Pedro Henrique L.M. Lopes; Michelle Souza Oliveira; Sergio Neves Monteiro; Édio Pereira Lima. 2018. "Thickness assessment and statistical optimization of a 3-layered armor system with ceramic front and curaua fabric composite/aluminum alloy backing." Composites Part B: Engineering 166, no. : 48-55.
O ABM Proceedings é o repositório de anais dos eventos organizados pela ABM Brasil. Associe-se!
Fábio De Oliveira Braga; Sérgio Neves Monteiro; Noan Tonini Simonassi. AVALIAÇÃO BALÍSTICA E DE FRATURA DE COMPÓSITOS REFORÇADOS COM FIBRAS DE CURAUÁ UTILIZADOS EM BLINDAGENS MULTICAMADA. ABM Proceedings 2018, 1 .
AMA StyleFábio De Oliveira Braga, Sérgio Neves Monteiro, Noan Tonini Simonassi. AVALIAÇÃO BALÍSTICA E DE FRATURA DE COMPÓSITOS REFORÇADOS COM FIBRAS DE CURAUÁ UTILIZADOS EM BLINDAGENS MULTICAMADA. ABM Proceedings. 2018; ():1.
Chicago/Turabian StyleFábio De Oliveira Braga; Sérgio Neves Monteiro; Noan Tonini Simonassi. 2018. "AVALIAÇÃO BALÍSTICA E DE FRATURA DE COMPÓSITOS REFORÇADOS COM FIBRAS DE CURAUÁ UTILIZADOS EM BLINDAGENS MULTICAMADA." ABM Proceedings , no. : 1.
The ballistic protection against high-energy projectiles, such as the 7.62 mm, is more efficiently performed by means of multilayered armor systems (MAS). A MAS might be composed of a ceramic front, followed by a fiber/fabric composite as intermediate layer, and a ductile metal back layer. In a previous investigation, a MAS with intermediate layer of epoxy composite reinforced with 30 vol.% of ramie fabric was ballistic tested against 7.62 mm ammunition and compared to MAS with Kevlar® (aramid fabric laminate) as intermediate layer. Both MAS met the standard requirements, but a significant cost reduction favored the ramie fabric composite. In the present work, two other related epoxy composites, one reinforced with raw ramie fibers and other with aramid fabric layers, are investigated as MAS intermediate layer. The objective is to achieve similar ballistic performance with more economical and/or environmentally friendly materials. The results indicate that both new composites met the requirements with comparable ballistic performance as the previously investigated ramie fabric and Kevlar®. Moreover, the ramie fiber composite MAS was the least expensive, among all of them, being 14% cheaper than the previously studied ramie fabric composite MAS.
Fábio De Oliveira Braga; Thiago Lara Milanezi; Sergio Neves Monteiro; Luis Henrique Leme Louro; Alaelson Gomes; Édio Pereira Lima. Ballistic comparison between epoxy-ramie and epoxy-aramid composites in Multilayered Armor Systems. Journal of Materials Research and Technology 2018, 7, 541 -549.
AMA StyleFábio De Oliveira Braga, Thiago Lara Milanezi, Sergio Neves Monteiro, Luis Henrique Leme Louro, Alaelson Gomes, Édio Pereira Lima. Ballistic comparison between epoxy-ramie and epoxy-aramid composites in Multilayered Armor Systems. Journal of Materials Research and Technology. 2018; 7 (4):541-549.
Chicago/Turabian StyleFábio De Oliveira Braga; Thiago Lara Milanezi; Sergio Neves Monteiro; Luis Henrique Leme Louro; Alaelson Gomes; Édio Pereira Lima. 2018. "Ballistic comparison between epoxy-ramie and epoxy-aramid composites in Multilayered Armor Systems." Journal of Materials Research and Technology 7, no. 4: 541-549.
Among the aluminum alloys, the 5052 has been extensively investigated aiming at high rate deformation applications, owing to its high mechanical strength, plasticity and toughness. In this work, the microstructure and microhardness of a 5052 H34 alloy were investigated. This alloy was subjected to ballistic impact with 7.62 mm ammunition as back layer of a multilayered armor system composed of a ceramic and a composite material. An increase in the microhardness was observed. However, changes in the microstructure were not significant. The fracture aspect of the alloy in the high deformation rate was compared to that of a tensile tested sample. A stronger plastic behavior was verified in ballistic tested samples.
Artur Camposo Pereira; Fabio De Oliveira Braga; Sergio Neves Monteiro; Thales Moreira De Azevedo; Wesley Soares Braga. Microstructural Evaluation of a 5052 H34 Aluminum Alloy Used in Multilayered Armor. Materials Science Forum 2018, 930, 513 -519.
AMA StyleArtur Camposo Pereira, Fabio De Oliveira Braga, Sergio Neves Monteiro, Thales Moreira De Azevedo, Wesley Soares Braga. Microstructural Evaluation of a 5052 H34 Aluminum Alloy Used in Multilayered Armor. Materials Science Forum. 2018; 930 ():513-519.
Chicago/Turabian StyleArtur Camposo Pereira; Fabio De Oliveira Braga; Sergio Neves Monteiro; Thales Moreira De Azevedo; Wesley Soares Braga. 2018. "Microstructural Evaluation of a 5052 H34 Aluminum Alloy Used in Multilayered Armor." Materials Science Forum 930, no. : 513-519.
The efficiency of heating absorption of aluminum sheets coated with copper oxide, CuO, was evaluated in solar panels. Coatings were produced by means of two techniques: vacuum metallic deposition and copper nitrate vaporization onto a pre-heated aluminum sheet. The optical and thermal efficiency of the coatings were evaluated through measurements of the spectral reflectance and surface temperature. The nature of the coating layer was investigated by macro examination. It was found that vacuum deposition presented superior optical efficiency and better adherence. By contrast, coatings produced from vapor are more uniform with higher concentration of CuO.
Sergio Neves Monteiro; Fabio De Oliveira Braga; Flavio James Tommasini; Artur Camposo Pereira; André Figueiredo; Fernanda Santos Da Luz. Selective Copper Oxide Coating on Aluminum Panels for Solar Heating Absorption. Materials Science Forum 2018, 930, 619 -624.
AMA StyleSergio Neves Monteiro, Fabio De Oliveira Braga, Flavio James Tommasini, Artur Camposo Pereira, André Figueiredo, Fernanda Santos Da Luz. Selective Copper Oxide Coating on Aluminum Panels for Solar Heating Absorption. Materials Science Forum. 2018; 930 ():619-624.
Chicago/Turabian StyleSergio Neves Monteiro; Fabio De Oliveira Braga; Flavio James Tommasini; Artur Camposo Pereira; André Figueiredo; Fernanda Santos Da Luz. 2018. "Selective Copper Oxide Coating on Aluminum Panels for Solar Heating Absorption." Materials Science Forum 930, no. : 619-624.
Ceramic armors are frequently used for protection against high energy projectiles, such as the 7.62 mm and 5.56 mm. Recently, it has been demonstrated that a modification in the geometry of the impact face, from flat to convex, enlarges the stress distribution zone created by the projectile-target interaction. This effect raises the projectile's energy absorption and might improve the user's safety. In the present work, the objective is to characterize ceramic armor plates with convex impact face, by means of the NIJ-0101.06 (2008) standard methodology, aiming to provide an eventual application in armor vests. The characterization is based on the measurement of the backface signature, a deformation behind armor imprinted in a reference material that simulates the consistency of the human body. The results showed significant improvement in the ballistic performance after the impact geometry modification.
Fábio De Oliveira Braga; Fernanda Santos da Luz; Sergio Neves Monteiro; Édio Pereira Lima Jr.. Effect of the impact geometry in the ballistic trauma absorption of a ceramic multilayered armor system. Journal of Materials Research and Technology 2018, 7, 554 -560.
AMA StyleFábio De Oliveira Braga, Fernanda Santos da Luz, Sergio Neves Monteiro, Édio Pereira Lima Jr.. Effect of the impact geometry in the ballistic trauma absorption of a ceramic multilayered armor system. Journal of Materials Research and Technology. 2018; 7 (4):554-560.
Chicago/Turabian StyleFábio De Oliveira Braga; Fernanda Santos da Luz; Sergio Neves Monteiro; Édio Pereira Lima Jr.. 2018. "Effect of the impact geometry in the ballistic trauma absorption of a ceramic multilayered armor system." Journal of Materials Research and Technology 7, no. 4: 554-560.
Several works have been dedicated to study the ballistic response of multilayered armor systems (MAS), including those using natural fiber composites as second layer. These composites disclosed good ballistic performance, having economic and environmental advantages. In the present work, the objective was to investigate the effect of areal densities of each MAS layer, in the overall performance of a MAS with an alumina ceramic front, a curaua fabric reinforced composite filling, and an aluminum alloy backing the target. Ballistic “backface signature” tests were conducted, varying the areal densities of the MAS layers according to a Box-Behnken design. The results showed a similar influence of the ceramic and aluminum layers in the MAS “backface signatures”, although deformation and failure mechanisms were significantly different. The composite also showed significant participation in the overall MAS performance. Since the composite is cheaper and lighter, a balance minimizing the other layers would be advantageous.
Fábio De Oliveira Braga; Pedro Henrique L. M. Lopes; Fernanda Santos Da Luz; Édio Pereira Lima; Sergio Monteiro. Influence of the Areal Density of Layers in the Ballistic Response of a Multilayered Armor System Using Box-Behnken Statistical Design. The Minerals, Metals & Materials Series 2018, 557 -564.
AMA StyleFábio De Oliveira Braga, Pedro Henrique L. M. Lopes, Fernanda Santos Da Luz, Édio Pereira Lima, Sergio Monteiro. Influence of the Areal Density of Layers in the Ballistic Response of a Multilayered Armor System Using Box-Behnken Statistical Design. The Minerals, Metals & Materials Series. 2018; ():557-564.
Chicago/Turabian StyleFábio De Oliveira Braga; Pedro Henrique L. M. Lopes; Fernanda Santos Da Luz; Édio Pereira Lima; Sergio Monteiro. 2018. "Influence of the Areal Density of Layers in the Ballistic Response of a Multilayered Armor System Using Box-Behnken Statistical Design." The Minerals, Metals & Materials Series , no. : 557-564.
Due to increasing improvement of weaponry and ammunition, attention is being given to the development of new materials that could more effectively resist to ballistic impact. In order to stop high energy bullets, with speed above 800 m/s, a high strength material is necessary. However, if just one material is used, then a relatively thick piece is required, which might affect negatively the wearer mobility. The objective of this work is to investigate the effect of thickness on the ballistic behavior of aramid fabric laminates, Kevlar®, hit by high energy bullet. The purpose is to find the minimum thickness to avoid perforation. Ballistic tests using conventional 7.62 mm ammunition were performed according to standard procedures. The macro and microscopic aspects of the target specimens were evaluated. The results showed a change in the ballistic behavior of the laminates as their thickness increased. It was found that until the laminate was able to capture the bullet, 96 layers (~50 mm) were required. This is significantly higher than the necessary thickness for a multilayered armor to stop the same 7.62 mm bullet.
Fábio De Oliveira Braga; Édio Pereira Lima Júnior; Eduardo De Sousa Lima; Sergio Neves Monteiro. The Effect of Thickness on Aramid Fabric Laminates Subjected to 7.62 MM Ammunition Ballistic Impact. Materials Research 2017, 20, 676 -680.
AMA StyleFábio De Oliveira Braga, Édio Pereira Lima Júnior, Eduardo De Sousa Lima, Sergio Neves Monteiro. The Effect of Thickness on Aramid Fabric Laminates Subjected to 7.62 MM Ammunition Ballistic Impact. Materials Research. 2017; 20 (suppl 2):676-680.
Chicago/Turabian StyleFábio De Oliveira Braga; Édio Pereira Lima Júnior; Eduardo De Sousa Lima; Sergio Neves Monteiro. 2017. "The Effect of Thickness on Aramid Fabric Laminates Subjected to 7.62 MM Ammunition Ballistic Impact." Materials Research 20, no. suppl 2: 676-680.
The interval of existence of dynamic strain aging (DSA) in AISI type 304 austenitic stainless steel subjected to quasi-static tension tests, under strain rates from 3.5 x 10 -2 to 3.5 x 10 -4 s -1 , in the temperature range from 25 to 800ºC was investigated. It was found that DSA occurs in the range extending from around 200 to 700ºC. Plastic instabilities associated with serrations, Portevin-Chatelier effect, allowed activation energies to be calculated and a possible mechanism of dislocation interaction with interstitial carbon atoms to be proposed. Significant increase in the ultimate strength, uniform elongation and work hardening demonstrate that DSA is a relevant phenomenon, which improves the high temperature mechanical properties of 304 steel. Keywords: Dynamic strain aging; austenitic stainless steel; work hardening
Sergio Neves Monteiro; Artur Camposo Pereira; Fábio De Oliveira Braga; Eduardo De Sousa Lima; Carlos Luis Ferreira. Relevance of Dynamic Strain Aging under Quasi-Static Tension on AISI 304 Stainless Steel. Materials Research 2017, 20, 421 -425.
AMA StyleSergio Neves Monteiro, Artur Camposo Pereira, Fábio De Oliveira Braga, Eduardo De Sousa Lima, Carlos Luis Ferreira. Relevance of Dynamic Strain Aging under Quasi-Static Tension on AISI 304 Stainless Steel. Materials Research. 2017; 20 (suppl 2):421-425.
Chicago/Turabian StyleSergio Neves Monteiro; Artur Camposo Pereira; Fábio De Oliveira Braga; Eduardo De Sousa Lima; Carlos Luis Ferreira. 2017. "Relevance of Dynamic Strain Aging under Quasi-Static Tension on AISI 304 Stainless Steel." Materials Research 20, no. suppl 2: 421-425.
Sergio Monteiro; Lucio Fabio Cassiano Nascimento; Édio Pereira Lima; Fernanda Santos Da Luz; Eduardo De Sousa Lima; Fábio De Oliveira Braga. Strengthening of stainless steel weldment by high temperature precipitation. Journal of Materials Research and Technology 2017, 6, 385 -389.
AMA StyleSergio Monteiro, Lucio Fabio Cassiano Nascimento, Édio Pereira Lima, Fernanda Santos Da Luz, Eduardo De Sousa Lima, Fábio De Oliveira Braga. Strengthening of stainless steel weldment by high temperature precipitation. Journal of Materials Research and Technology. 2017; 6 (4):385-389.
Chicago/Turabian StyleSergio Monteiro; Lucio Fabio Cassiano Nascimento; Édio Pereira Lima; Fernanda Santos Da Luz; Eduardo De Sousa Lima; Fábio De Oliveira Braga. 2017. "Strengthening of stainless steel weldment by high temperature precipitation." Journal of Materials Research and Technology 6, no. 4: 385-389.
O ABM Proceedings é o repositório de anais dos eventos organizados pela ABM Brasil. Associe-se!
Kleber Da Silva Pazeto; Leonardo Carpintero; Fábio De Oliveira Braga; Lidia Ágata De Sena; Monique Osório Talarico Da Conceição; Sergio Neves Monteiro. ANÁLISE DE FALHA EM TUBULAÇÃO DE AÇO INOXIDÁVEL SUPER DUPLEX UNS S32750 PARA CAPTAÇÃO E TRATAMENTO DE ÁGUA OCEÂNICA. 72º Congresso Anual da ABM 2017, 1 .
AMA StyleKleber Da Silva Pazeto, Leonardo Carpintero, Fábio De Oliveira Braga, Lidia Ágata De Sena, Monique Osório Talarico Da Conceição, Sergio Neves Monteiro. ANÁLISE DE FALHA EM TUBULAÇÃO DE AÇO INOXIDÁVEL SUPER DUPLEX UNS S32750 PARA CAPTAÇÃO E TRATAMENTO DE ÁGUA OCEÂNICA. 72º Congresso Anual da ABM. 2017; ():1.
Chicago/Turabian StyleKleber Da Silva Pazeto; Leonardo Carpintero; Fábio De Oliveira Braga; Lidia Ágata De Sena; Monique Osório Talarico Da Conceição; Sergio Neves Monteiro. 2017. "ANÁLISE DE FALHA EM TUBULAÇÃO DE AÇO INOXIDÁVEL SUPER DUPLEX UNS S32750 PARA CAPTAÇÃO E TRATAMENTO DE ÁGUA OCEÂNICA." 72º Congresso Anual da ABM , no. : 1.
O ABM Proceedings é o repositório de anais dos eventos organizados pela ABM Brasil. Associe-se!
Fábio De Oliveira Braga; Fernanda Santos Da Luz; Sergio Neves Monteiro; Édio Pereira Lima Jr.; Luis Henrique Leme Louro; Alaelson Vieira Gomes. DESEMPENHO BALÍSTICO DE UMA BLINDAGEM CERÂMICA MULTICAMADA COM MODIFICAÇÃO NA GEOMETRIA DE IMPACTO. 72º Congresso Anual da ABM 2017, 1 .
AMA StyleFábio De Oliveira Braga, Fernanda Santos Da Luz, Sergio Neves Monteiro, Édio Pereira Lima Jr., Luis Henrique Leme Louro, Alaelson Vieira Gomes. DESEMPENHO BALÍSTICO DE UMA BLINDAGEM CERÂMICA MULTICAMADA COM MODIFICAÇÃO NA GEOMETRIA DE IMPACTO. 72º Congresso Anual da ABM. 2017; ():1.
Chicago/Turabian StyleFábio De Oliveira Braga; Fernanda Santos Da Luz; Sergio Neves Monteiro; Édio Pereira Lima Jr.; Luis Henrique Leme Louro; Alaelson Vieira Gomes. 2017. "DESEMPENHO BALÍSTICO DE UMA BLINDAGEM CERÂMICA MULTICAMADA COM MODIFICAÇÃO NA GEOMETRIA DE IMPACTO." 72º Congresso Anual da ABM , no. : 1.
Natural fiber reinforced polymer matrix composites are gaining attention as engineering materials for advanced applications, including components of high performance ballistic armors. This requires superior mechanical properties, such as tenacity. Composites reinforced with jute fiber are currently being investigated as possible advanced engineering materials. Therefore, the objective of the present work was to evaluate the impact resistance of epoxy matrix composites reinforced with up to 30 vol% of continuous and aligned jute fibers. This evaluation was performed by measuring the Charpy absorbed impact energy of standard ASTM notched specimens. The results indicated a significant increase in the absorbed impact energy with the volume fraction of jute fibers. The microstructural mechanism related to this performance was revealed by scanning electron microscopy analysis. Keywords: Jute fiber, Epoxy composites, Charpy, Impact tes
Artur Camposo Pereira; Sergio Neves Monteiro; Foluke Salgado de Assis; Frederico Muylaert Margem; Fernanda Santos da Luz; Fábio De Oliveira Braga. Charpy impact tenacity of epoxy matrix composites reinforced with aligned jute fibers. Journal of Materials Research and Technology 2017, 6, 312 -316.
AMA StyleArtur Camposo Pereira, Sergio Neves Monteiro, Foluke Salgado de Assis, Frederico Muylaert Margem, Fernanda Santos da Luz, Fábio De Oliveira Braga. Charpy impact tenacity of epoxy matrix composites reinforced with aligned jute fibers. Journal of Materials Research and Technology. 2017; 6 (4):312-316.
Chicago/Turabian StyleArtur Camposo Pereira; Sergio Neves Monteiro; Foluke Salgado de Assis; Frederico Muylaert Margem; Fernanda Santos da Luz; Fábio De Oliveira Braga. 2017. "Charpy impact tenacity of epoxy matrix composites reinforced with aligned jute fibers." Journal of Materials Research and Technology 6, no. 4: 312-316.
The fibers extracted from the stem of the giant bamboo plant have been investigated as possible composite reinforcement due to their relatively high tensile strength. A dimensional characterization of the distribution and the effect of diameter on the mechanical resistance of bamboo fiber of the species Dendrocalmus giganteus has not yet been performed. The present work characterized the distribution of a bundle of this bamboo fiber. Based on this characterization, diameter intervals were set and the dependence of the tensile strength of these fibers with a corresponding diameter was analyzed by the Weibull method. The results indicated an inverse dependence, in which the highest tensile strength was obtained for the thinnest fibers. Moreover, a mathematical hyperbolic relationship was found to adjust well this inverse correlation. An investigation of the microstructure by means of scanning electron microscopy revealed a potential mechanism for this correlation. Keywords: Giant bamboo, Fiber diameter, Tensile strength, Weibull analysi
Sergio Neves Monteiro; Frederico Muylaert Margem; Fábio De Oliveira Braga; Fernanda Santos da Luz; Noan Tonini Simonassi. Weibull analysis of the tensile strength dependence with fiber diameter of giant bamboo. Journal of Materials Research and Technology 2017, 6, 317 -322.
AMA StyleSergio Neves Monteiro, Frederico Muylaert Margem, Fábio De Oliveira Braga, Fernanda Santos da Luz, Noan Tonini Simonassi. Weibull analysis of the tensile strength dependence with fiber diameter of giant bamboo. Journal of Materials Research and Technology. 2017; 6 (4):317-322.
Chicago/Turabian StyleSergio Neves Monteiro; Frederico Muylaert Margem; Fábio De Oliveira Braga; Fernanda Santos da Luz; Noan Tonini Simonassi. 2017. "Weibull analysis of the tensile strength dependence with fiber diameter of giant bamboo." Journal of Materials Research and Technology 6, no. 4: 317-322.
O ABM Proceedings é o repositório de anais dos eventos organizados pela ABM Brasil. Associe-se!
Fábio De Oliveira Braga; Thales Moreira De Azevedo; Wesley Soares Braga; Ana Alice Gomes Lavatori; Leandro Guimarães De Oliveira; Pedro Henrique Lameirão Machado Lopes; Sergio Neves Monteiro; Monique Osório Talarico Da Conceição. AVALIAÇÃO MICROESTRUTURAL DE UMA LIGA DE ALUMÍNIO 5052 H34 UTILIZADA EM BLINDAGEM MULTICAMADA. 72º Congresso Anual da ABM 2017, 1 .
AMA StyleFábio De Oliveira Braga, Thales Moreira De Azevedo, Wesley Soares Braga, Ana Alice Gomes Lavatori, Leandro Guimarães De Oliveira, Pedro Henrique Lameirão Machado Lopes, Sergio Neves Monteiro, Monique Osório Talarico Da Conceição. AVALIAÇÃO MICROESTRUTURAL DE UMA LIGA DE ALUMÍNIO 5052 H34 UTILIZADA EM BLINDAGEM MULTICAMADA. 72º Congresso Anual da ABM. 2017; ():1.
Chicago/Turabian StyleFábio De Oliveira Braga; Thales Moreira De Azevedo; Wesley Soares Braga; Ana Alice Gomes Lavatori; Leandro Guimarães De Oliveira; Pedro Henrique Lameirão Machado Lopes; Sergio Neves Monteiro; Monique Osório Talarico Da Conceição. 2017. "AVALIAÇÃO MICROESTRUTURAL DE UMA LIGA DE ALUMÍNIO 5052 H34 UTILIZADA EM BLINDAGEM MULTICAMADA." 72º Congresso Anual da ABM , no. : 1.
O ABM Proceedings é o repositório de anais dos eventos organizados pela ABM Brasil. Associe-se!
Noan Tonini Simonassi; Luiz Antônio Fonseca Peçanha Jr; Sergio Neves Monteiro; Ítalo Do Vale Tomaz; Marlon Mendes De Oliveira; Alan Monteiro Ramalho; Fabio De Oliveira Braga. CARACTERIZAÇÃO DE COMPÓSITOS DE TIB2-ALN PARA APLICAÇÃO COMO FERRAMENTA DE CORTE. 72º Congresso Anual da ABM 2017, 1 .
AMA StyleNoan Tonini Simonassi, Luiz Antônio Fonseca Peçanha Jr, Sergio Neves Monteiro, Ítalo Do Vale Tomaz, Marlon Mendes De Oliveira, Alan Monteiro Ramalho, Fabio De Oliveira Braga. CARACTERIZAÇÃO DE COMPÓSITOS DE TIB2-ALN PARA APLICAÇÃO COMO FERRAMENTA DE CORTE. 72º Congresso Anual da ABM. 2017; ():1.
Chicago/Turabian StyleNoan Tonini Simonassi; Luiz Antônio Fonseca Peçanha Jr; Sergio Neves Monteiro; Ítalo Do Vale Tomaz; Marlon Mendes De Oliveira; Alan Monteiro Ramalho; Fabio De Oliveira Braga. 2017. "CARACTERIZAÇÃO DE COMPÓSITOS DE TIB2-ALN PARA APLICAÇÃO COMO FERRAMENTA DE CORTE." 72º Congresso Anual da ABM , no. : 1.