It is by now well established that loading conditions with suffi ciently large triaxialities can induce the suddenappearance of internal cavities within elastomeric (and other soft) solids. The occurrence of such a phenome-non, commonly referred to as cavitation, can be attributed to the growth of pre-existing defects into fi nite sizes.In the fi rst part of this discussion, I w...

Frictional properties of soft elastomers have been in question for over half of a century. Early studies on natural rubber originated for the sole purpose of tabulating properties for bulk consumer applications, such as viscoelastic adhesives, tires, and windshield wipers, to name a few. Empirical tabulation of frictional properties persisted until the early 1950’s, when Roth et al. and Thirion...

This study investigates the mechanical behaviour of laminated elastomeric bearings with a low shape factor (LSF) and dynamic response structures mounted on them. Axial loads have significant influence LSF bearings. Most existing theories models for cannot be employed because they disregard important effects axial shortening bulging rubber layers horizontal bearing stiffness. In this study, simp...

It is impractical and uneconomic to design a structure that remains elastic throughout severe ground motions. The main design philosophy is that minor structural damages are acceptable as long as the structure does not collapse. Hence, seismic base isolation of structures provides a better alternative in constructing seismic resistant structures. A fixed-base structure designed in accordance to...

It is proposed to use elastomeric composites as artificial joint bearing surfaces to increase their fluid film lubrication and therefore reduce the number of failures which have been attributed to wear mechanisms related to frictional forces. The fluid generated between the surfaces supports part of the load and prevents direct contact of the bearing surfaces. In order to obtain optimum elastoh...

This study aims to investigate seismic behavior of lead-core rubber elastomeric bearing (LRB) and curved surface friction pendulum slider (FPS) base isolated models considering torsional irregularity for typical reinforced concrete buildings. Nonlinear structural members was considered in analysis models. Total 1408 different nonlinear time history analyses 3-dimensional 3, 5, 7 9-story were pe...

In the article, it was determined that furan oligomer added to composition causes additional structuring in process of vulcanization, and as a result, density hardness vulcanization network composite increases, value relative length decreases. It shown optimal amount oligomers rubber compounds is equal 10 weight units per 100 rubber. With inclusion secondary product acetylene production elastom...

Opalized white tuff (OWT) with 40 μm average particle size and 39.3 m(2)/g specific surface area has been introduced into polyisoprene rubber (NR). Their reinforcing effects were evaluated by comparisons with those from precipitated silica (PSi). The cure characteristic, apparent activation energy of cross-link (E(ac)) and reversion (E(ar)), and mechanical properties of a variety of composites ...