Topic
Hydrostatic stress
About: Hydrostatic stress is a research topic. Over the lifetime, 1568 publications have been published within this topic receiving 37773 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, the case II diffusion of penetrants in polymer sheet is associated with constrained swelling of the material and the generation of internal stresses, and it is shown that the specimen shape change, as the fronts meet, is also accompanied by an increase in the degree of solvent uptake as the hydrostatic stress component on the swollen layers is relaxed.
149 citations
TL;DR: In this paper, the basic governing equations for isotropic and homogeneous generalized thermoelastic half-space under hydrostatic initial stress are formulated in the context of the Green and Naghdi theory of types II and III.
147 citations
TL;DR: In this paper, a method is described and used to evaluate the transient stresses in a sintering compact of ZnO containing a hard, dense dispersion of SiC. The effect of these stresses on microstructural development is considered.
146 citations
TL;DR: In this article, a novel cohesive surface model for crazing in polymers is developed, which incorporates the initiation, growth and breakdown of crazes based on micromechanical considerations.
141 citations
TL;DR: In this paper, a three-dimensional unit cell model for particle-filled materials is presented, based on a Voronoi tessellation of particles arranged on a body-centered cubic (BCC) array.
Abstract: A three-dimensional micromechanical unit cell model for particle-filled materials is presented. The cell model is based on a Voronoi tessellation of particles arranged on a body-centered cubic (BCC) array. The three-dimensionality of the present cell model enables the study of several deformation modes, including uniaxial, plane strain and simple shear deformations, as well as arbitrary principal stress states. The unit cell model is applied to studies on the micromechanical and macromechanical behavior of rubber-toughened polycarbonate. Different load cases are examined, including plane strain deformation, simple shear deformation and principal stress states. For a constant macroscopic strain rate, the different load cases show that the macroscopic flow strength of the blend decreases with an increase in void volume fraction, as expected. The main mechanism for plastic deformation is broad shear banding across inter-particle ligaments. The distributed nature of plastic straining acts to reduce the amount of macroscopic strain softening in the blend as the initial void volume fraction is increased. In the case of plane strain deformation, the plastic flow is observed to initiate across inter-particle ligaments in the direction of constraint. This particular mode of deformation could not have been captured using a two-dimensional, plane strain idealization of cylindrical voids in a matrix. The potential for localized crazing and/or cavitation in the matrix is addressed. It is observed that the introduction of voids acts to relieve hydrostatic stress in the matrix material, compared to the homopolymer. It is also seen that the predicted peak hydrostatic stress in the matrix is higher under plane strain deformation than under triaxial tension (with equal lateral stresses), for the same macroscopic stress triaxiality. The effect of void volume fraction on the macroscopic uniaxial tension behavior of the different blends is examined using a Considere construction for dilatant materials. The natural draw ratio was predicted to decrease with an increase in void volume fraction.
141 citations