The Experts below are selected from a list of 195 Experts worldwide ranked by ideXlab platform
E Hennes - One of the best experts on this subject based on the ideXlab platform.
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mechanical properties of zylon epoxy composite
Composites Part B-engineering, 2002Co-Authors: Y.k Huang, P.h Frings, E HennesAbstract:Abstract The Zylon/epoxy composite is formed by wet-winding Zylon fibre, poly( p -phenylene-2,6-benzobisoxazole) or PBO, with the epoxy (Stycast 1266). The effects of pre-stress on the distribution and the filling factor of the fibre are studied. It is shown that a Zylon/epoxy composite with a uniform fibre distribution and a very high filling factor is achievable. The mechanical properties of the Zylon/epoxy composite at room temperature and 77 K are investigated by uni-axial tensile tests and transverse compression tests. The results indicate that the ultimate tensile strength (UTS) of the Zylon/epoxy composite is mainly determined by the fraction of the Zylon fibre. The UTS of the Zylon fibres in the composite is found to be larger than 4.3 GPa. Due to the easy processing and the very high UTS, the Zylon/epoxy composite is suitable as reinforcement material for high-field Magnet Coils.
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exploding pressure vessel test on zylon epoxy composite
Composites Part B-engineering, 2002Co-Authors: Y.k Huang, P.h Frings, E HennesAbstract:Abstract The efficiency of zylon/epoxy composites under radial load for the reinforcement of high-field Magnet Coils is studied using the exploding pressure vessel technique. Under the combined stresses in tangential and radial directions, the behaviour of zylon/epoxy composite is well described by the theory of orthotropic cylindrical shells when the pre-stress effects are considered. The ultimate tensile strength of the zylon/epoxy shell with a fibre-filling factor of 90% is found to be 4.8 GPa. The bursting pressure (maximal radial stress) is, for a given filling factor, a monotonically increasing function of the ratio of the shell thickness to inner radius. The beneficial effects of the pre-stress during winding on the reinforcement are discussed.
Y.k Huang - One of the best experts on this subject based on the ideXlab platform.
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mechanical properties of zylon epoxy composite
Composites Part B-engineering, 2002Co-Authors: Y.k Huang, P.h Frings, E HennesAbstract:Abstract The Zylon/epoxy composite is formed by wet-winding Zylon fibre, poly( p -phenylene-2,6-benzobisoxazole) or PBO, with the epoxy (Stycast 1266). The effects of pre-stress on the distribution and the filling factor of the fibre are studied. It is shown that a Zylon/epoxy composite with a uniform fibre distribution and a very high filling factor is achievable. The mechanical properties of the Zylon/epoxy composite at room temperature and 77 K are investigated by uni-axial tensile tests and transverse compression tests. The results indicate that the ultimate tensile strength (UTS) of the Zylon/epoxy composite is mainly determined by the fraction of the Zylon fibre. The UTS of the Zylon fibres in the composite is found to be larger than 4.3 GPa. Due to the easy processing and the very high UTS, the Zylon/epoxy composite is suitable as reinforcement material for high-field Magnet Coils.
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exploding pressure vessel test on zylon epoxy composite
Composites Part B-engineering, 2002Co-Authors: Y.k Huang, P.h Frings, E HennesAbstract:Abstract The efficiency of zylon/epoxy composites under radial load for the reinforcement of high-field Magnet Coils is studied using the exploding pressure vessel technique. Under the combined stresses in tangential and radial directions, the behaviour of zylon/epoxy composite is well described by the theory of orthotropic cylindrical shells when the pre-stress effects are considered. The ultimate tensile strength of the zylon/epoxy shell with a fibre-filling factor of 90% is found to be 4.8 GPa. The bursting pressure (maximal radial stress) is, for a given filling factor, a monotonically increasing function of the ratio of the shell thickness to inner radius. The beneficial effects of the pre-stress during winding on the reinforcement are discussed.
P.h Frings - One of the best experts on this subject based on the ideXlab platform.
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mechanical properties of zylon epoxy composite
Composites Part B-engineering, 2002Co-Authors: Y.k Huang, P.h Frings, E HennesAbstract:Abstract The Zylon/epoxy composite is formed by wet-winding Zylon fibre, poly( p -phenylene-2,6-benzobisoxazole) or PBO, with the epoxy (Stycast 1266). The effects of pre-stress on the distribution and the filling factor of the fibre are studied. It is shown that a Zylon/epoxy composite with a uniform fibre distribution and a very high filling factor is achievable. The mechanical properties of the Zylon/epoxy composite at room temperature and 77 K are investigated by uni-axial tensile tests and transverse compression tests. The results indicate that the ultimate tensile strength (UTS) of the Zylon/epoxy composite is mainly determined by the fraction of the Zylon fibre. The UTS of the Zylon fibres in the composite is found to be larger than 4.3 GPa. Due to the easy processing and the very high UTS, the Zylon/epoxy composite is suitable as reinforcement material for high-field Magnet Coils.
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exploding pressure vessel test on zylon epoxy composite
Composites Part B-engineering, 2002Co-Authors: Y.k Huang, P.h Frings, E HennesAbstract:Abstract The efficiency of zylon/epoxy composites under radial load for the reinforcement of high-field Magnet Coils is studied using the exploding pressure vessel technique. Under the combined stresses in tangential and radial directions, the behaviour of zylon/epoxy composite is well described by the theory of orthotropic cylindrical shells when the pre-stress effects are considered. The ultimate tensile strength of the zylon/epoxy shell with a fibre-filling factor of 90% is found to be 4.8 GPa. The bursting pressure (maximal radial stress) is, for a given filling factor, a monotonically increasing function of the ratio of the shell thickness to inner radius. The beneficial effects of the pre-stress during winding on the reinforcement are discussed.
D P Hampshire - One of the best experts on this subject based on the ideXlab platform.
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soldered joints an essential component of demountable high temperature superconducting fusion Magnets
Superconductor Science and Technology, 2016Co-Authors: Yeekin Tsui, E Surrey, D P HampshireAbstract:Demountable superconducting Magnet Coils would offer significant benefits to commercial nuclear fusion power plants. Whether large pressed joints or large soldered joints provide the solution for demountable fusion Magnets, a critical component or building block for both will be the many, smaller-scale joints that enable the supercurrent to leave the superconducting layer, cross the superconducting tape and pass into the solder that lies between the tape and the conductor that eventually provides one of the demountable surfaces. This paper considers the electrical and thermal properties of this essential component part of demountable high temperature superconducting (HTS) joints by considering the fabrication and properties of jointed HTSs consisting of a thin layer of solder (In52Sn48 or Pb38Sn62) sandwiched between two rare-earth-Ba2Cu3O7 (REBCO) second generation HTS coated conductors (CCs). The HTS joints are analysed using numerical modelling, critical current and resistivity measurements on the joints from 300 to 4.2 K in applied Magnetic fields up to 12 T, as well as scanning electron microscopy studies. Our results show that the copper/silver layers significantly reduce the heating in the joints to less than a few hundred mK. When the REBCO alone is superconducting, the joint resistivity (R J) predominantly has two sources, the solder layer and an interfacial resistivity at the REBCO/silver interface (~25 nΩ cm2) in the as-supplied CCs which together have a very weak Magnetoresistance in fields up to 12 T. We achieved excellent reproducibility in the R J of the In52Sn48 soldered joints of better than 10% at temperatures below T c of the REBCO layer which can be compared to variations of more than two orders of magnitude in the literature. We also show that demountable joints in fusion energy Magnets are viable and need only add a few percent to the total cryogenic cost for a fusion tokamak.
Yeekin Tsui - One of the best experts on this subject based on the ideXlab platform.
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soldered joints an essential component of demountable high temperature superconducting fusion Magnets
Superconductor Science and Technology, 2016Co-Authors: Yeekin Tsui, E Surrey, D P HampshireAbstract:Demountable superconducting Magnet Coils would offer significant benefits to commercial nuclear fusion power plants. Whether large pressed joints or large soldered joints provide the solution for demountable fusion Magnets, a critical component or building block for both will be the many, smaller-scale joints that enable the supercurrent to leave the superconducting layer, cross the superconducting tape and pass into the solder that lies between the tape and the conductor that eventually provides one of the demountable surfaces. This paper considers the electrical and thermal properties of this essential component part of demountable high temperature superconducting (HTS) joints by considering the fabrication and properties of jointed HTSs consisting of a thin layer of solder (In52Sn48 or Pb38Sn62) sandwiched between two rare-earth-Ba2Cu3O7 (REBCO) second generation HTS coated conductors (CCs). The HTS joints are analysed using numerical modelling, critical current and resistivity measurements on the joints from 300 to 4.2 K in applied Magnetic fields up to 12 T, as well as scanning electron microscopy studies. Our results show that the copper/silver layers significantly reduce the heating in the joints to less than a few hundred mK. When the REBCO alone is superconducting, the joint resistivity (R J) predominantly has two sources, the solder layer and an interfacial resistivity at the REBCO/silver interface (~25 nΩ cm2) in the as-supplied CCs which together have a very weak Magnetoresistance in fields up to 12 T. We achieved excellent reproducibility in the R J of the In52Sn48 soldered joints of better than 10% at temperatures below T c of the REBCO layer which can be compared to variations of more than two orders of magnitude in the literature. We also show that demountable joints in fusion energy Magnets are viable and need only add a few percent to the total cryogenic cost for a fusion tokamak.
