The Experts below are selected from a list of 9 Experts worldwide ranked by ideXlab platform

Taylor, Paul Allen - One of the best experts on this subject based on the ideXlab platform.

  • On the Theory of Diffusion in Linear Viscoelastic Media
    1
    Co-Authors: Taylor, Paul Allen
    Abstract:

    86 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1981.A recently developed viscoelastodiffusive theory is further examined in terms of its mathematical foundations and obvious generalizations. A derivation of the basic equations under quite general assumptions is provided and an equivalence between a "hereditary" version and a "differential operator" version of the theory is established. Both relaxation and Creep Types of viscoelastodiffusive behavior are considered. The concepts of chemical potential, fading memory, and a correspondence principle are discussed. The general development is concluded with an illustrative example.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD

Ri Xia - One of the best experts on this subject based on the ideXlab platform.

  • a new Creep constitutive relationship for high temperature alloys
    International Journal of Mechanical Sciences, 2021
    Co-Authors: Mingchen Huo, Ri Xia
    Abstract:

    Abstract From experimental Creep rates of high temperature alloys, it is found they can be classified into three Types: with Creep rate decreasing only, with Creep rate deceasing firstly but accelerating after a certain time, and with Creep rate increasing slowly but accelerating after a certain time. These three typical Creep Types can be characterized in a unified form, by dividing Creep process into two Creep stages distinguished by the critical Creep time. Before the critical time, the first stage has decreasing or slowly increasing Creep rate only, after the critical time, the second stage also has accelerating Creep rate besides the previous Creep rate. A new generalized Creep constitutive relationship with Creep time and four stress-dependent parameters has then been proposed. The stress-dependent parameters can be interpolated from test results under various stress levels. It is found that the interpolation functions should be expressed in different styles according to the stress level distinguished by a critical Creep stress. The critical Creep stress can be determined just by the glass strain variation under various stress levels. More meaningfully, critical Creep stress corresponds to the cross point in the bi-linear model of Creep failure life in fact. It is also found there is a non-Creep stress below which Creep deformation can be neglected.

Mingchen Huo - One of the best experts on this subject based on the ideXlab platform.

  • a new Creep constitutive relationship for high temperature alloys
    International Journal of Mechanical Sciences, 2021
    Co-Authors: Mingchen Huo, Ri Xia
    Abstract:

    Abstract From experimental Creep rates of high temperature alloys, it is found they can be classified into three Types: with Creep rate decreasing only, with Creep rate deceasing firstly but accelerating after a certain time, and with Creep rate increasing slowly but accelerating after a certain time. These three typical Creep Types can be characterized in a unified form, by dividing Creep process into two Creep stages distinguished by the critical Creep time. Before the critical time, the first stage has decreasing or slowly increasing Creep rate only, after the critical time, the second stage also has accelerating Creep rate besides the previous Creep rate. A new generalized Creep constitutive relationship with Creep time and four stress-dependent parameters has then been proposed. The stress-dependent parameters can be interpolated from test results under various stress levels. It is found that the interpolation functions should be expressed in different styles according to the stress level distinguished by a critical Creep stress. The critical Creep stress can be determined just by the glass strain variation under various stress levels. More meaningfully, critical Creep stress corresponds to the cross point in the bi-linear model of Creep failure life in fact. It is also found there is a non-Creep stress below which Creep deformation can be neglected.

Chang Xiaoxiao - One of the best experts on this subject based on the ideXlab platform.

  • Comparison between dynamic and static Creep characteristics of frozen silt
    Chinese Journal of Geotechnical Engineering, 2006
    Co-Authors: Chang Xiaoxiao
    Abstract:

    The dynamic and static Creep characteristics of frozen silt were studied based on the dynamic and static Creep tests.During the initial Creep stage and the steady Creep stage,strain of dynamic Creep was less than that of static Creep.However,for a dynamic Creep,due to its higher Creep strain rate during the steady Creep stage and consequently a considerable strain increment,after a much shorter steady stage,it moved into the tertiary stage quickly where the strain became larger than that of a static Creep.It was also discovered that there was a similar trend of Creep failure characteristic,but with different values,between dynamic and static Creeps in response to the change of loading stress.Both failure time and failure strain of dynamic Creep were smaller than those of static Creep,and the minimum Creep strain rate was greater.More distinct differences between these two Creep Types would be observed as the loading stress decreased.