Showing papers on "Critical radius published in 1983"
TL;DR: In this article, the cavity radius at which the strongly radius-dependent outflux equals the net influx has been termed the critical radius, and an analysis for critical radius based on a derived expression containing functional dependences on gas pressure, dislocation and cavity capture efficiencies, temperature, and other material and irradiation variables is given.
39 citations
TL;DR: In this paper, the critical radius and the flux distribution for a bare cylinder of infinite length were computed using the F..nu.. method, which yields results accurate to at least six significant figures.
Abstract: The F..nu.. method is used to compute the critical radius and the flux distribution for a bare cylinder of infinite length. With modest computational effort, the developed solution technique, though approximate, yields results accurate to at least six significant figures.
17 citations
01 Jan 1983
TL;DR: In this paper, the growth processes on singular and vicinal surfaces are reduced to tangential motion of steps; this process is again treated as displacements of small portions of a step.
Abstract: To analyze the processes on a surface of a growing crystal one commonly uses the concept of attachment and detachment of individual atoms (or growth units). However , this model is too idealized in some cases (e.g. growth from the melt). Besides, it is unnecessarily detailed if the characteristic surface scale (e.g. critical radius of a twodimensional nucleus) is much greater than the atomic spacing. It is possible to develop a more general theory that deals with displacements of small portions of interface rather than with individual surface atoms. In particular, the growth processes on singular and vicinal surfaces are reduced to tangential motion of steps; this process is again treated as displacements of small portions of a step. This approach is especially useful for a crystalmelt interface. Further we shall confine ourselves to the boundary between one-component crystal and its own melt, although most of the results are of quite general character.
8 citations
01 Jan 1983
TL;DR: In this paper, a method to estimate the crack tip core region radius was proposed to evaluate the critical radius, ro.079″ (2 mm) 2024-T3 plate.
Abstract: A method to estimate the crack tip core region radius was proposed. As an example, the test data of MCIC [9] for 0.079″ (2 mm) 2024-T3 plate were used to to evaluate the critical radius, ro. Fracture angles and critical external loads were calculated by several mixed mode fracture criteria. Exact stress solutions were used. The results were compared with experimental data [4]. It was found that by proper selection of the critical radius, some of the criteria which were derived from linear theory, may be used to estimate the ductile fracture within engineering accuracy.