Common to liquids, solids and substances in between the former two is that if a stress is applied to them, they will strain. Stress may be visualized by placing a small amount of fluid between two parallel plates. When one plate slides over the other, forces act on the fluid dependent upon the rate of the plate movement. This causes a shear stress on the liquid. Recall laminar flow of fluids through a tubular vessel. Strain is the response to the stress. If solids are elastic, they deform and return to their original shape. Since fluids are not elastic and, hence, viscous, their deformation is irreversible.

Introduction to rheology

Design Of Steel Structures

Modeling of Asphalt Concrete

Research on the structural behavior and buckling of vertical, aboveground tanks employed to store oil and fuels have significantly increased during the past two decades. Interest in this shell form is related not just to the cost of the infrastructure, but also because failures in cases of accidents or natural disasters may cause huge economic, environmental and social losses. This review concentrates on buckling problems of such tanks under static or quasi-static loads, including uniform pressure, wind, settlement of foundation, and fire. In all cases, buckling is considered as a static process. Attention is given to the load definition in each case, followed by buckling studies under previously defined pressures or temperatures. The structural configuration of tanks is first described in order to understand what is specific about this structural form. Next, the theoretical framework for stability and buckling is briefly described to place each contribution in a wider context. Each loading case is first explained, experiments or case-studies are briefly described, and computational analytical modeling is reviewed; finally, efforts towards improving design are mentioned. Most papers published in the literature have been motivated by wind effects on tanks, but the review shows that other areas, such as thermal buckling under an adjacent fire, are currently receiving increasing attention.

Buckling of vertical oil storage steel tanks: Review of static buckling studies

Global sensitivity analysis of lateral-torsional buckling resistance based on finite element simulations

Modelling of Elastomeric Bearings with Application of Yeoh Hyperelastic Material Model

Buckling resistance assessment of steel I-section beam-columns not susceptible to LT-buckling

The fatigue property of an asphalt mix is an important issue in pavement design. This property is often determined with the aid of a four-point bending (4PB) test in controlled deflection mode. The fatigue property is related to the decrease in the calculated complex stiffness modulus, however, due to the non- homogenous stress and strain field in the beam, the measured response does not represent the stiffness modulus of the material but a weighted stiffness value. For a correct interpretation, a fatigue damage material model like the Asphalt Concrete Pavement-Fatigue model is needed. After integration, the calculated and measured responses are compared. By varying the model parameters, an excellent comparison between the two responses is obtained up to a certain number of cycles. This number of cycles is denoted as the fatigue life NPH. The accumulated dissipated energy at the surface of the beam in the midsection can be expressed as a constant times the fatigue life NPH to the power z and also ...

Application of a material fatigue damage model in 4PB tests

The main goal of this paper is to propose the performance parameter for binder which is good for quality prediction of asphalt mixture in frame of resistance to permanent deformation (rutting). Additionally, correlation between, proposed by the authors, repeatable shear creep-recovery test carried out on binder and bituminous mixture rutting test is under evaluation. The results are analyzed and correlation between the proposed functional parameter and rut depth is shown. Thanks to that it is possible to claim that expensive rutting test procedure can be assisted with simple test carried out in dynamic shear rheometer at the initial mix design procedure.

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The Influence of Binder Rheological Properties on Asphalt Mixture Permanent Deformation

https://hal-enpc.archives-ouvertes.fr/hal-02057686/document

Marcin Gajewski

Papers

Modelling of Elastomeric Bearings with Application of Yeoh Hyperelastic Material Model

Buckling resistance assessment of steel I-section beam-columns not susceptible to LT-buckling

Application of a material fatigue damage model in 4PB tests

The Influence of Binder Rheological Properties on Asphalt Mixture Permanent Deformation

Prediction of Asphalt Concrete Low-temperature Cracking Resistance on the Basis of Different Constitutive Models☆