Tensile and fracture behaviour in mode I and mode II of fibre reinforced plastics at 77 K following low temperature irradiation

Humer, K.; Weber, H.W.; Tschegg, E. K.; Gerstenberg, H.; Goshchitskii, B. N.

doi:10.1016/0011-2275(95)90904-t

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…This kind of scaling approach was intensively investigated by Humer et al, who employed numerous irradiation facilities (including electron accelerators, 60 Co sources and various neutron sources) and, in same cases, simultaneously investigated the issue of the temperature maintained during the irradiation process as well as the influence of annealing cycles to room temperature. 21,[60][61][62][63][64][65][66][67] The results of this comprehensive study confirmed scaling by the total absorbed dose in a highly satisfactory way and will be briefly summarized in the following. Figure 19 shows results on the ultimate tensile strength obtained on identical sets of samples at four different radiation sources, the TRIGA reactor in Vienna, the spallation source IPNS at Argonne, a 2 MeV electron accelerator and an intense 60 Co source (both at Takasaki).…”

Section: Insulation Materialssupporting

confidence: 53%

Radiation Effects on Superconducting Fusion Magnet Components

Weber

2011

Int. J. Mod. Phys. E

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Nuclear fusion devices based on the magnetic confinement principle heavily rely on the existence and performance of superconducting magnets and have always significantly contributed to advancing superconductor and magnet technology to their limits. In view of the presently ongoing construction of the tokamak device ITER and the stellerator device Wendelstein 7X and their record breaking parameters concerning size, complexity of design, stored energy, amperage, mechanical and magnetic forces, critical current densities and stability requirements, it is deemed timely to review another critical parameter that is practically unique to these devices, namely the radiation response of all magnet components to the lifetime fluence of fast neutrons and gamma rays produced by the fusion reactions of deuterium and tritium. I will review these radiation effects in turn for the currently employed standard "technical" low temperature superconductors NbTi and Nb 3 Sn, the stabilizing material (Cu) as well as the magnet insulation materials and conclude by discussing the potential of high temperature superconducting materials for future generations of fusion devices, such as DEMO.

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Section: Insulation Materialssupporting

confidence: 53%

Radiation Effects on Superconducting Fusion Magnet Components

Weber

2011

Int. J. Mod. Phys. E

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“…However, the data on the effect of irradiation on interlaminar fracture toughness are scarce. Humer et al [9] reported that both specific energies released in the crack opening and in interlaminar shear mode, measured at -196 o C, show degradation after the gamma irradiation up to 0.18 MGy at -196 o C. The degradation was slightly intensified when the irradiated samples were subjected to warm-up cycles at room temperature before testing at -196 o C [9].…”

Section: Disscussionmentioning

confidence: 99%

Delamination Strain Energy Release Rate in Carbon Fiber/Epoxy Resin Composites

Gordić¹,

Djordjević²,

Sekulic³

et al. 2007

MSF

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The paper reports on an experimental study of the Mode I interlaminar fracture of unidirectional carbon fibers/epoxy resin composites. Mode I delamination strain energy release rate GIC was determined in double cantilever beam (DCB) test, before and after gamma irradiation at various doses. Glass transition temperature, Tg of epoxy matrix was determined from dynamic mechanical measurements. The delamination surfaces of tested coupons were observed by scanning electron microscopy. The variations in GIC values were correlated with irradiation doses, Tg values and the features of delamination microfractographs, as well as with the variation under irradiation of matrix or fibre/matrix dominated mechanical properties.

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“…Hummer et al [10] reported that both specific energies released in the crack opening and in interlaminar shear mode initiation, in glass fiber PMC, measured at 77 K, show the degradation after gamma irradiation at 77 K, up to 0.18 MGy dose. The degradation is slightly intensified when the irradiated samples were subjected to warm-up cycles at room temperature, before testing at 77 K.…”

Section: Introductionmentioning

confidence: 98%