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UKAEA-CCFE-PR(25)3282025
Experiments and finite element modelling have been used to explore a method for miniaturising fibre push-out testing to the scale of thin ion irradiated layers. Correlation of interfacial surface area to debond stress has been identified for short fibres, and is related to a size effect following a Weibull distribution. Weibull analysis may be us…
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UKAEA-CCFE-PR(25)3682024
This research utilizes established cyclic deformation models to simulate the Bauschinger effect observed in copper monocrystal cantilever experiments during the initial bending and straightening phases. Crystal plasticity finite element simulations employing Armstrong-Frederick, Orowan-Sleeswyk, and various other backstress models have failed to…
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UKAEA-CCFE-PR(25)3242024
Calculation of stresses from high-resolution electron-backscatter diffraction (EBSD) maps has been a quite useful tool for understanding single- and polycrystal deformation. In this research, we used the weak form of a least-squares fit to the experimental measurements together with mechanical constraints in both two- and three-dimensional stress…
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UKAEA-CCFE-PR(25)3242024
Calculation of stresses from high-resolution electron-backscatter diffraction (EBSD) maps has been a quite useful tool for understanding single- and polycrystal deformation. In this research, we used the weak form of a least-squares fit to the experimental measurements together with mechanical constraints in both two- and three-dimensional stress…
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UKAEA-CCFE-PR(24)2542023
Conventional crystal plasticity (CP) solvers are based on a Newton-Raphson (NR) approach which use an initial guess for the free variables (often stress) to be solved. These solvers are limited by a finite interval of convergence and often fail when the free variable falls outside this interval. Solution failure results in the reduction of the t…
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