The Experts below are selected from a list of 78 Experts worldwide ranked by ideXlab platform
Samuel Molony - One of the best experts on this subject based on the ideXlab platform.
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Tensile and fatigue failure of 3D printed parts with Continuous Fibre Reinforcement
International Journal of Rapid Manufacturing, 2017Co-Authors: Hadley Brooks, Dana Tyas, Samuel MolonyAbstract:This paper introduces a design methodology used to integrate Continuous Fibre Reinforcement into AM polymer parts with the aim of improving their mechanical properties. Tensile and low-cycle fatigue (LCF) testing of reinforced parts is carried out for a range of load conditions and strain rates. Physical testing showed that it was possible to improve the strength of parts by 400% and cycles to failure by 42,800% with the addition of 5% carbon by weight. Logarithmic load/cycle relationships were found also samples showed significant variability in the number of cycles to failure. No correlation between the density of the polylactic acid (PLA) infill and the tensile strength or LCF life. Access holes used to thread the Fibre into the Reinforcement channels were identified as stress concentrators initiating cracks in the PLA and separation of the Reinforcement from the PLA part.
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Design and evaluation of additively manufactured parts with three dimensional Continuous Fibre Reinforcement
Materials and Design, 2016Co-Authors: Hadley Brooks, Samuel MolonyAbstract:Additive manufacturing (AM) provides many benefits such as reduced manufacturing lead times, streamlined supply chains, part consolidation, structural optimisation and improved buy-to-fly ratios. Barriers to adoption include high material and processing costs, low build rates, isotropic material properties, and variable processing conditions. Currently AM polymer parts are far less expensive to manufacture than AM metal parts, therefore improving the properties of polymer parts is highly desirable.This paper introduces a design methodology used to integrate Continuous Reinforcement into AM polymer parts with the aim of improving their mechanical properties. The method is validated with the design and testing of three case studies, a pulley housing, hook and universal joint used to demonstrate the applicability of the method for tensile, bending and torsion loading types respectively.Physical testing showed that it was possible to improve the strength of parts by over 4000%, elongation to failure by over 2000% and stiffness by approximately 200%. In addition a method of integrating condition monitoring capabilities into the parts was demonstrated.An analysis of the specific strength of the parts suggests that the reinforced parts are comparable to aluminium alloys, suggesting that in some cases AM polymer composite parts could supplant more costly metal parts.
Martin R. Bache - One of the best experts on this subject based on the ideXlab platform.
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Mechanical characterisation of a Fibre reinforced oxide/oxide ceramic matrix composite
Journal of the European Ceramic Society, 2015Co-Authors: D.t. Di Salvo, E.e. Sackett, Richard Johnston, D. Thompson, P. Andrews, Martin R. BacheAbstract:Abstract Monotonic tension, fatigue and creep experiments were conducted on an oxide/oxide ceramic matrix composite over the range of temperature 20–1200 °C. The role of Continuous Fibre Reinforcement, differential thermal expansion, stress redistribution interactions between Fibres and matrix and the influence of inherent processing defects are all considered when describing the deformation and ultimate mechanical failure of these systems.
Hadley Brooks - One of the best experts on this subject based on the ideXlab platform.
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Tensile and fatigue failure of 3D printed parts with Continuous Fibre Reinforcement
International Journal of Rapid Manufacturing, 2017Co-Authors: Hadley Brooks, Dana Tyas, Samuel MolonyAbstract:This paper introduces a design methodology used to integrate Continuous Fibre Reinforcement into AM polymer parts with the aim of improving their mechanical properties. Tensile and low-cycle fatigue (LCF) testing of reinforced parts is carried out for a range of load conditions and strain rates. Physical testing showed that it was possible to improve the strength of parts by 400% and cycles to failure by 42,800% with the addition of 5% carbon by weight. Logarithmic load/cycle relationships were found also samples showed significant variability in the number of cycles to failure. No correlation between the density of the polylactic acid (PLA) infill and the tensile strength or LCF life. Access holes used to thread the Fibre into the Reinforcement channels were identified as stress concentrators initiating cracks in the PLA and separation of the Reinforcement from the PLA part.
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Design and evaluation of additively manufactured parts with three dimensional Continuous Fibre Reinforcement
Materials and Design, 2016Co-Authors: Hadley Brooks, Samuel MolonyAbstract:Additive manufacturing (AM) provides many benefits such as reduced manufacturing lead times, streamlined supply chains, part consolidation, structural optimisation and improved buy-to-fly ratios. Barriers to adoption include high material and processing costs, low build rates, isotropic material properties, and variable processing conditions. Currently AM polymer parts are far less expensive to manufacture than AM metal parts, therefore improving the properties of polymer parts is highly desirable.This paper introduces a design methodology used to integrate Continuous Reinforcement into AM polymer parts with the aim of improving their mechanical properties. The method is validated with the design and testing of three case studies, a pulley housing, hook and universal joint used to demonstrate the applicability of the method for tensile, bending and torsion loading types respectively.Physical testing showed that it was possible to improve the strength of parts by over 4000%, elongation to failure by over 2000% and stiffness by approximately 200%. In addition a method of integrating condition monitoring capabilities into the parts was demonstrated.An analysis of the specific strength of the parts suggests that the reinforced parts are comparable to aluminium alloys, suggesting that in some cases AM polymer composite parts could supplant more costly metal parts.
Roger Kempers - One of the best experts on this subject based on the ideXlab platform.
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Flexural properties of three-dimensional printed Continuous wire polymer composites
Materials Science and Technology, 2019Co-Authors: Yehia Ibrahim, Garrett W. Melenka, Roger KempersAbstract:ABSTRACTRecently, Continuous Fibre Reinforcement has been combined with three-dimensional (3D) printing to create stiffer printed components. This study investigates the effect of wire volume fract...
D.t. Di Salvo - One of the best experts on this subject based on the ideXlab platform.
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Mechanical characterisation of a Fibre reinforced oxide/oxide ceramic matrix composite
Journal of the European Ceramic Society, 2015Co-Authors: D.t. Di Salvo, E.e. Sackett, Richard Johnston, D. Thompson, P. Andrews, Martin R. BacheAbstract:Abstract Monotonic tension, fatigue and creep experiments were conducted on an oxide/oxide ceramic matrix composite over the range of temperature 20–1200 °C. The role of Continuous Fibre Reinforcement, differential thermal expansion, stress redistribution interactions between Fibres and matrix and the influence of inherent processing defects are all considered when describing the deformation and ultimate mechanical failure of these systems.