Compression Failure Modes of Carbon Fiber Fabric Scraps/Epoxy Laminates

Published on Jan 1, 2016in Advanced Materials Research
· DOI :10.4028/WWW.SCIENTIFIC.NET/AMR.1135.52
Carlos V. Opelt8
Estimated H-index: 8
Christiane Sales Reis de Souza3
Estimated H-index: 3
+ 2 AuthorsMirabel Cerqueira Rezende34
Estimated H-index: 34
The composite prepreg waste is still an environmental challenge. In the last decade, several researchers have been studying the recycling and reuse processes of composite components, mainly to use in secondary (non-structural) components. In this paper, uncured aerospace grade prepreg scraps resulted from the production waste were used to manufacture laminates. The carbon reinforcement of the prepreg presented plain weave style fabric. To manufacture the laminates the hand-lay up process was used, randomly positioning the scraps and without respecting the preferred directions of the warp and weft. Therefore, the resulting laminate is multidirectional (in the plane) and orthotropic. The cure was performed in autoclave at the maximum temperature of (180 ± 1)°C and pressure of 100 psi. This laminate was tested in compression according to standard SACMA SRM 1R-94. The results show an average compression resistance equivalent to that of laminates produced with continuous layers, although with a higher dispersion. In order to understand this variation, the fracture surfaces of the laminates were analyzed by scanning electron microscopy (SEM) in order to identify the failure modes. The specimens present shear and interlaminar failure modes, in addition to a mixed mode of failure (a transition between the shear and interlaminar failures). For the same specimen, the analysis of the internal arrangement of the fibers shows that changes in failure modes occur in regions where the carbon fabric is not continuous, i.e. there are joinings of scraps. It was also observed that none of the compression tests resulted in catastrophic failure of the specimens, possibly due to a greater resistance to fracture growth in the presence of mixed failure mode.
📖 Papers frequently viewed together
50 Citations
2 Citations
1 Author (Krzysztof Pucha)
Cited By8
#1Hossein Ramezani-Dana (A&M: Texas A&M University)
#2Moussa Gomina (CNRS: Centre national de la recherche scientifique)H-Index: 24
Last. Gilles Orange (Solvay)H-Index: 3
view all 5 authors...
In this work, we examine the relationships between the microstructure and the mechanical properties of glass fiber–reinforced polyamide 6,6 composite materials (Vf = 54%). These materials made by t...
#1Sang Yoon ParkH-Index: 11
Last. Won Jong Choi (Korea Aerospace University)H-Index: 9
view all 2 authors...
This paper presents a review of recent literature related to the static mechanical testing of thermoset-based carbon fiber reinforced composites and introduces a material qualification methodology ...
Abstract The damage mechanism in a composite plate with an edge notch influenced by water freezing and subjected to bending loading is investigated using Scanning Electron Microscopy images. The microstructure of the composite plate around the notch tip induced by freeze-thaw cycles is compared to dry specimens and showed a change in shape of the notch in micro-scale as well as introducing surface minor damage after conditioning. Moreover, the fracture surface of specimens, conditioned for 10, 2...
#1Bin He (Huada: Beijing University of Chemical Technology)H-Index: 1
#2Boyao Wang (Huada: Beijing University of Chemical Technology)H-Index: 1
Last. Dezhen Wu (Huada: Beijing University of Chemical Technology)H-Index: 46
view all 6 authors...
Abstract High-strength and high-modulus polyimide fiber is a kind of high-performance organic fiber rapidly developing in recent years. Taking advantage of its high strength and toughness and being combined with carbon fiber, it is expected to make a balance between stiffness and toughness, so as to afford a kind of structural composite with high strength and toughness. In this study, a series of hybrid fiber reinforced composites were prepared with high-strength and high-modulus PI fiber and ca...
2 CitationsSource
#1Carlos V. OpeltH-Index: 8
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
view all 3 authors...
Abstract After the advances of microscopic techniques, the literature shows an increasing number of fractographic studies of fiber reinforced polymer composites. However, the fractographic aspects of compressive failures remain slightly explored and poorly enlightened. In this context, the purpose of this work is to present some of the main mechanisms responsible for the fracture energy absorption in the case of fiber reinforced polymer composites submitted to compressive loads. To do so, this s...
12 CitationsSource
#1Carlos V. OpeltH-Index: 8
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 34
view all 3 authors...
Abstract The fractographic aspects of compression failures remain inadequately explored, mainly due to the damages that the compressive load promotes on the fracture surfaces, which difficult the identification of fracture aspects. In addition, despite the large quantity of studies on the literature, there is no consensus concerning the existing compressive failure modes. Aiming to contribute in this research field, this paper has the objective of proposing a novel classification for the compres...
22 CitationsSource
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
view all 5 authors...
This study aims to contribute to sustainability by proposing the reuse of composite prepreg scrap as an added value from discards. The research evaluates the microstructure and mechanical properties of laminates processed by the reuse of uncured carbon fibre/F155-epoxy resin prepreg scraps, waste from the ply cutting area of an aeronautical industry. The composite scraps were used as collected and were randomly positioned to produce laminates to be cured at an autoclave. The mechanical character...
1 CitationsSource
#1Carlos V. OpeltH-Index: 8
#2Jane Maria Faulstich de Paiva (UFSCar: Federal University of São Carlos)H-Index: 16
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
view all 4 authors...
Abstract This paper is part of a series of fractographic studies on fiber-reinforced polymer composites submitted to compression, which attempts to fill the gap in the composite failure analysis. Here, the effect of the hygrothermal conditioning is assessed for composite laminates manufactured from a carbon fiber/epoxy resin prepregs, which used plain weave fiber arrangement. The laminate was trimmed into compression test specimens, according to the ASTM D3410 standard. After the test, the aspec...
17 CitationsSource