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 authors examined the behavior of polyvinylidene difluoride (PVDF), both hydrostatically (equation of state; shock stress, shock velocity and particle velocity), and its deviatoric response (shear strength behind the shock front).
Abstract: Polyvinylidene difluoride (PVDF) has found application as a piezoelectric stress gauge for the measurement of the shock response of materials. Therefore, it is perhaps surprising that little data concerning its bulk response to shock loading has reached the open literature. In this paper, we examine the behaviour of this polymer, both hydrostatically (equation of state; shock stress, shock velocity and particle velocity), and its deviatoric response (shear strength behind the shock front). Equation-of-state measurements show close agreement with existing data, but also a strong non-linearity in shock velocity at low particle velocities. The calculated hydrodynamic response also agrees well with existing pressure measurements, but is significantly lower than the measured shock stresses, suggesting that the shear strength of this material has a strong positive dependence on the applied shock pressure. Subsequent measurements of the lateral component of stress, which in combination with the known longitudinal stress has been used to calculate the shear strength, has confirmed this.
9 citations
TL;DR: In this paper, the dependence of annealing temperature on stress and microstructure in damascene Cu was examined by X-ray diffraction and transmission electron microscopy.
9 citations
TL;DR: In this article, the authors focus on the analytical solution for a wetting fluid inside a 3D penny shaped circular crack in an elastic infinite solid loaded in tension at infinity, when the vapor pressure and the variation of liquid mass can be neglected.
9 citations
TL;DR: In this paper, the epoxy type E-862 has been tested in tension and shear over a wide range of strain rates from 10 -4 to 700 s -1.
Abstract: Epoxy type E-862 has been tested in tension and shear over a wide range of strain rates from 10 -4 to 700 s -1 . Experiments at strain rates of up to 2 s -1 have been conducted with a hydraulic testing machine, and tests at strain rates above 300 s -1 have been conducted using the split Hopkinson bar technique. The results show that the epoxy is very sensitive to the rate of deformation. A stiffer material response (increase in modulus) is observed with increasing strain rate in both tension and shear loadings. The maximum stress also increases with increasing strain rate. The maximum shear stress at a strain rate of 700 s -1 is roughly twice the maximum stress at a strain rate of 10 -4 s -1 . In the tensile tests a smaller increase in the maximum stress is observed. This, however, might be due to the existence of a hydrostatic stress component that causes a premature fracture of the specimens.
9 citations
TL;DR: In this article, the formation and evolution of interfacial voids are investigated in the case of metal matrix composites (MMCs) reinforced by ceramic fibres and subjected to high compressive loads.
9 citations