Topic
Hydrostatic stress
About: Hydrostatic stress is a research topic. Over the lifetime, 1568 publications have been published within this topic receiving 37773 citations.
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TL;DR: In this paper, the deformation properties of single crystal GaAs were investigated in the presence of compression and indentation tests at a range of temperatures, including 200-550°C, and strain rates, 2.5 −10−5−2 −2.10−4 s−1.
25 citations
TL;DR: In this paper, the authors used a radial basis neural network to predict axial stress, the hoop stress, hydrostatic stress and the Poisson ratio of a sintered Al-Fe composite preform.
25 citations
TL;DR: In this article, the results of birefringence measurements in highly bireringent optical bow-tie fibers under hydrostatic pressure up to 100 MPa were presented.
Abstract: The authors present the results of birefringence measurements in highly birefringent optical bow-tie fibers under hydrostatic pressure up to 100 MPa. The birefringence measurement method is based on twist-induced effects and has never before been applied in a high-pressure environment. The experiments were conducted using a specially designed pressure facility, which made it possible to simultaneously generate several mechanical perturbations, including twist and hydrostatic stress, and to investigate their effects on mode transmission in optical fibers. A comparison with theoretical results as well as with previous experimental data on pressure influence on the beat length parameter in highly birefringent fibers is provided. >
24 citations
TL;DR: The presence of biogenic impurities is shown to decrease the strain required to induce twin formation in calcite and, thus, the yield stress, and increased propensity for twinning provides a possible explanation for the increased hardness and penetration resistance observed experimentally in biominerals.
Abstract: We employ classical molecular dynamics to calculate elastic properties and to model the nucleation and propagation of deformation twins in calcite, both as a pure crystal and with magnesium and aspartate inclusions. The twinning is induced by applying uniaxial strain to the crystal and relaxing all stress components except the uniaxial component. A detailed analysis of the atomistic processes reveal that the twinning mechanism involves small displacements of the Ca ions and cooperative rotations of the CO3 ions. The volume of the twinned region expands under increased uniaxial strain via the propagation of steps along the twin boundaries. The energy cost of the twin boundaries is compensated by the reduced hydrostatic stress and strain energy. The presence of biogenic impurities is shown to decrease the strain required to induce twin formation in calcite and, thus, the yield stress. This increased propensity for twinning provides a possible explanation for the increased hardness and penetration resistance observed experimentally in biominerals.
24 citations
TL;DR: In this paper, a finite element study of 3D crack tip fields in pressure sensitive plastic solids (such as polymers or metallic glasses) under mode I, small scale yielding conditions is performed.
24 citations