This indicates that steady-state creep is not possible in such a material. Hutchinson's analysis of polycrystalline plasticity is also adapted to reach the same conclusion, by giving some grains an infinitely large flow stress; namely, those grains equivalent to elastic inclusions, on whose ...
thus prior creep damage, on fatigue crack growth and fracture behaviour of the material and to include these effects in fatigue and fracture assessments. ... A Mehmanparast - 《Iranian Polymer Journal》 被引量: 37发表: 2012年 Microstructural Evolution During Long Term Creep Tests of 9%Cr Steel...
The high-strain creep of open-cell low-density polymer foams is analysed using linearviscoelasticity theory. The microstructure is represented by the Kelvin foam, a regular lattice oftetrakaidecahedral cells. Compressive creep curves are predicted from the measured stressrelaxation modulus of a polyure...
A Litewka,Zdzisaw Lis 摘要: The aim of this note is to present the theoretical model of a creep damage and creep rupture of metals. Constitutive equations describing these phenomena were formulated assuming that the tertiary creep is a result of stiffness and strength reduction of a material ...
Starting from an elastoplastic model for the description of short term behavior, the time-dependent deformation is described in terms of evolution of microstructure, leading to progressive degradation of elastic modulus and failure strength of material. The proposed model is applied to predict material ...
A Model of Damage and Creep Interaction in a Quasi-Brittle Composite Material Under Axial Loading Creep is the time-dependent, viscoelastic strain observed in materials under constant stress. Creep can increase structural strains/deformations to non-ser... MMR Taha,NG Shrive - 《Journal of Mechanic...
作者: J Kollegger 摘要: Scientists from physics and engineering disciplines working on the next generation of materials will find that these papers present the state-of-the-art in concrete creep, shrinkage, and durability mechanics. 被引量: 3 年份: 2015 收藏...
When a material is loaded at high temperature it creeps—that is, it deforms continuously and permanently at a stress that is less than the stress that wou... MF Ashby,DRH Jones - 《Engineering Materials》 被引量: 0发表: 2012年 Development of Creep-Resistant Alloy Steels THE' major part...
A phenomenological treatment of plastic deformation is proposed which makes it possible to describe in a unified way the plastic behavior of a material both under dynamic loading and in creep. The treatment is based on the notion of a unique structure parameter that determines the mechanical state...
The program uses a rate type creep law based on expanding the relaxation function in Dirichlet series. The creep law is linear, the aging is accounted for, and the temperature effects on creep rate as well as the rate of aging are considered. Material properties can be input either as ...