Geraldo Maurício Cândido
Instituto Tecnológico de Aeronáutica
Composite numberUltimate tensile strengthAramidMode (statistics)FabricationComposite laminatesComposite materialEpoxyMoistureCompression (physics)Materials scienceScanning electron microscopePlain weaveContext (language use)Polymer compositesFracture (geology)FiberFracture mechanicsFailure mode and effects analysisAdhesiveDelaminationFibre-reinforced plasticShear (sheet metal)Fracture toughness
35Publications
10H-index
269Citations
Publications 34
Newest
#1Thaís Peres Zanetine Marques (UNIFESP: Federal University of São Paulo)
#2Sergio MayerH-Index: 5
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 34
view all 4 authors...
Abstract This study presents the main fractographic aspects and failure modes involved on the fracture of scarf repaired laminates submitted to tensile test, using scanning electron microscopy (SEM) technique. A detailed analysis of the fractographic aspects was carried out correlating them to the failure modes, the local crack propagation, and the mechanical performance of the scarf joint. SEM analyses showed cohesive failure of the adhesive film associated with a strong mechanical anchoring be...
Source
#1Francis Mariana González Ramírez (ITA: Instituto Tecnológico de Aeronáutica)H-Index: 2
#2Felipe Parise Garpelli (ITA: Instituto Tecnológico de Aeronáutica)H-Index: 2
Last. Maurício Vicente Donadon (ITA: Instituto Tecnológico de Aeronáutica)H-Index: 15
view all 7 authors...
Abstract Aeronautic structures are exposed to a great variety of temperatures and humid environments during service. Nowadays, it is known that the combined influence of moisture and temperature induces further detrimental effects on the fatigue behavior of bonded joints when compared to the influence of each isolated condition. The effect of hygrothermal pre-conditioning on the fatigue delamination growth onset of different bonded technologies was investigated. This paper provides a material da...
2 CitationsSource
Abstract Adhesive bonding technologies exhibit several advantages over conventional mechanical fasteners which include lower weight, reduced stress concentration in the adherents and excellent fatigue properties allowing the design of smooth surface contour and damage tolerant aerostructures. The overall structural performance of the composite joint depends on several factors related to the manufacturing process, such as surface preparation procedure, adhesive type, aging effects, and deficiency...
2 CitationsSource
#1Rita de Cássia Mendonça Sales (ITA: Instituto Tecnológico de Aeronáutica)H-Index: 6
#2A.F. de SousaH-Index: 1
Last. Maurício Vicente Donadon (ITA: Instituto Tecnológico de Aeronáutica)H-Index: 15
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Abstract Adhesive joints exhibit several advantages over conventional joints based on mechanical fasteners such as more uniform stress distribution, enhanced fatigue performance, stiffer connection, lower weight, smooth surface countor. However, the influence of environmental effects related to temperature and moisture absorption on the mechanical performance of these types of composite joints are not yet fully understood. This work investigates the hygrothermal effects on fracture toughness of ...
5 CitationsSource
#1Lorena Cristina Miranda Barbosa (UNIFESP: Federal University of São Paulo)H-Index: 6
#2Samia Danuta Brejão de Souza (UNESP: Sao Paulo State University)H-Index: 4
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 34
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Abstract Joints obtained by resistance welding of polyphenylene sulphide (PPS) laminates reinforced with bidirectional glass fiber (GF) fabrics were investigated by fractographic analyses. The welded joints were tested under lap shear loading at room temperature. The fracture surfaces were analyzed by scanning electron microscopy (SEM) technique. Electric resistance welding technique uses the matrix flow property, when the thermoplastic is heated above the softening temperature (for amorphous po...
13 CitationsSource
#1Núbia Nale Silveira (Aeronáutica)H-Index: 3
Last. Maurício Vicente Donadon (Aeronáutica)H-Index: 15
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2 CitationsSource
#2Carlos V. OpeltH-Index: 8
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 34
view all 7 authors...
This study aims to reuse the waste of uncured composite prepreg scraps from the ply cutting manufacturing process in the aerospace industry, avoiding the resin loss, waste disposal and expenses with its incineration.Carbon fiber/F155-epoxy resin laminates were produced by randomly positioned scraps, with different sizes and shapes, and characterized by tensile, compression, interlaminar shear (ILSS), and flexural tests. Tensile, compression, and flexural strengths of produced laminates decreased...
3 CitationsSource
#1Natália MarinhoH-Index: 1
#2Mariano A. ArbeloH-Index: 13
Last. Maurício Vicente DonadonH-Index: 15
view all 6 authors...
Source
#1Francis Mariana González Ramírez (ITA: Instituto Tecnológico de Aeronáutica)H-Index: 2
#2Felipe Parise Garpelli (ITA: Instituto Tecnológico de Aeronáutica)H-Index: 2
Last. Maurício Vicente Donadon (ITA: Instituto Tecnológico de Aeronáutica)H-Index: 15
view all 7 authors...
Abstract This work focuses on Mode I fatigue induced delamination growth onset characterization of co-cured (CC), co-bonded (CB) and secondary bonded (SB) composite joints with an epoxy interleaf. The CC joints used in this work comprise only fibers and resin, while, CB and SB joints contain an adhesive film. Experimental tests were carried out at room temperature using double cantilever beam (DCB) specimens. The delamination behavior was evaluated in terms of the strain energy release rate (SER...
3 CitationsSource
#1Lorena Cristina Miranda Barbosa (UNIFESP: Federal University of São Paulo)H-Index: 6
#2Samia Danuta Brejão de Souza (UNESP: Sao Paulo State University)H-Index: 4
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 34
view all 5 authors...
Abstract This work shows a fractographic study on fracture surfaces of welded joints by electrical resistance of thermoplastic composites based on polyphenylene sulfide (PPS) reinforced with continuous carbon fiber (CF), evaluated after lap shear loading. The fracture surfaces were generated with the complete breakdown of the specimens under the same conditions used in the mechanical test. The fractographic aspects of fracture surfaces were analyzed by scanning electron microscopy (SEM). SEM ana...
12 CitationsSource