Axle bearings of railway car bogies are important parts that support the running cars. It is desirable to detect damage axle at an early state. Therefore, autonomous detection system (ADDS) was developed does not require a power supply nor wiring and notifies bearing vehicle. The ADDS utilized anti-vibration rubber with built-in piezoelectric element wireless transmitter; which installed on box...

The mechanical performance of reinforced composites is strongly influenced at different scales by the stress transferred matrix-fibre interfaces and any surface where material discontinuity occurs. In particular, response elastomeric reinforcement composed cords with helically wound fibres heavily compromised fatigue delamination phenomena occurring cord-rubber as well ply interfaces, since rub...

For the manufacture of frost-resistant oil and petrol-resistant rubber products, one most widely used rubbers is nitrile-butadiene (NBR) with a low acrylonitrile content 17–20 %. However, technical properties its vulcanizates do not always meet all high performance requirements. Therefore, study possibility improving characteristics based on NBR an urgent task. This paper presents results study...

Rubber is well known as the basic material for some structural devices, such seaport fenders and seismic isolators. In practice, to seismically isolate a structure it necessary interpose between foundation superstructure rubber device that increases period of superstructure, feature allows be "transparent" excitation. A isolator constituted typically by package several pads 1–2 cm thick vertica...

Conventional bearing systems and materials, which are important components of machine elements, have often failed to fulfil requirements, especially in places where sealing is required. In such cases, sliding bearings with PTFE- NBR-based polymer elastomer materials operating water or oil preferred. this study, the performance two alternative rubber-based synthetic styrene butadiene rubber (SBR...

This paper presents the approach for the assessing of the operational reliability of a multi-layer thick-walled tube made of rubber with textile reinforcement. The analysis of the fatigue accumulation process is carried out within the framework of the concept of the continuum mechanics of damage. The mathematical model, which takes into account the accumulation of damages in case of a random sp...

Background and aims. The purpose of this study was to evaluate initial force and force decay of commercially available elastomeric ligatures and elastomeric separators in active tieback state in a simulated oral environment. Materials and methods. A total of 288 elastomeric ligatures and elastomeric separators from three manufacturers (Dentaurum, RMO, 3M Unitek) were stretched to 100% and 150% ...

Earthquakes are one of the natural hazards that occur due to sudden violent movement of earth’s surface which releases energy and has destructive power in many parts of the world. The development of recent technologies for the control of seismic hazards catches the attention of structural engineers to make the structures seismically resistant. The seismic base isolation technique is a passive p...