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 investigated the cohesive traction-separation law based on constrained three-dimensional atomistic simulations and showed that the Mises stress does not play a role in material failure in the nano-scale single-crystal aluminum.
75 citations
TL;DR: In this article, a simple time-independent mathematical model for the monotonic and cyclic behavior of concrete under multiaxial stress conditions is proposed, where a bounding surface in stress space is a function of the maximum strain experienced by the material to the present time.
Abstract: A simple time-independent, mathematical model is proposed for the monotonic and cyclic behavior of concrete under multiaxial stress conditions. An essential feature of the model is a bounding surface in stress space, which is a function of ϵ\N\dm\da\dx = the maximum strain experienced by the material to the present time. The “yield” surface degenerates into the current stress point. Strain increments dϵ\N\di\dj are considered completely plastic and are computed by superposition of: (1) An isotropic component, proportional to the hydrostatic stress increment; and (2) deviatoric and isotropic components, proportional to the octahedral shear stress increment. The plastic modulus for calculation of the latter strain components is a function of: (1) The distance of the stress point from the bounding surface, measured along the direction of the stress increment dσ\N\di\dj; and (2) ϵ\N\dm\da\dx. This functional dependence of the plastic modulus and the fact that the bounding surface shrinks as ϵ\N\dm\da\dx increases allow realistic modeling of the nonlinear unloading and reloading behavior of concrete.
75 citations
TL;DR: In this paper, a 3D cohesive element based modeling procedure for predicting hydrogen embrittlement susceptibility prediction of an X70 weld thermal simulated Heat Affected Zone has been developed, based on the initial cohesive stiffness entity.
74 citations
TL;DR: In this paper, the authors discussed the integration of the hydrostatic stress, Gm, which is usually used in free forging, as a parameter to describe the closure of the center pores.
74 citations
TL;DR: In this paper, the internal stress state of a three-phase elliptic inclusion which is bonded to an infinite matrix through an intermediate elastic layer is studied. But the authors focus on the interphase layer.
Abstract: For an elastic inclusion embedded within an elastic matrix, it is the interfacialstresses that control mechanical integrity of the inclusion/matrix system. To eliminate the stresspeaks at the interface, the uniform hydrostatic stress state within the inclusion is of particularinterest because it achieves both uniform normal stress and vanishing tangential stress along theentire interface. Motivated by practical significance of interphase layer, the present paper studiesthe internal stress state of a three-phase elliptic inclusion which is bonded to an infinite matrixthrough an intermediate elastic layer. What is essential is that the interfaces of the three-phaseelliptic inclusion considered are two confocal ellipses. A simple condition is found that ensuresthat the internal stress state within the elliptic inclusion is uniform and hydrostatic. For givenremote stresses and material parameters, this condition gives a simple relationship between thethickness of the interphase layer and the aspect ratio of the elliptic inclusion. The exact stressfield is obtained in elementary form when this condition is met. In particular, the hoop stress inthe interphase layer is found to be uniform along the entire interphase/inclusion interface. It isbelieved that the availability of this condition relies on the confocal character of the ellipticinterfaces.
74 citations