Abstract This paper presents the experimental analysis of vulcanization process nitrile rubbers for diaphragms fabrication used in FBG-based pressure sensors. Tests using with different rubber thicknesses (0.5mm, 1.0mm, and 1.5mm), temperatures (125°C, 150°C, 200°C), times (2.5min 5.0min) were performed to analyse chemical degradation diaphragms. Degradation was digital macrography diaphragm su...

The purpose of this article is to describe two types of apparatus which have been found useful in the collection of urine from male and female infants, and also some modifications of the methods previously published from this unit (Edmunds, 1950). The method used for the male infants is based upon that described by Edmunds, but that used for the female infants employs a technique which does not...

nowadays, soil reinforcement using polymer elements have been investigated by a number of researchers in order to increase the load capacity of soils. reinforcing soils using fibers is a method of soil improvement, which offers a homogenous mixture in combination with soils, regarding their tensile strength. this combination maintains pressure loading capacity and properties in mutual resistant...

Anti-pollution flashover of insulator is important for power systems. In recent years, haze-fog weather occurs frequently, which makes discharge occurs easily on the insulator surface and accelerates insulation aging of insulator. In order to study the influence of haze-fog on the surface discharge of room temperature vulcanized silicone rubber, an artificial haze-fog lab was established. Based...

The pneumatic soft actuators have both passive flexibility of the casing and active through pressurizing depressurizing. These features are expected to be human-friendly because they enable approach using an original system by controlling internal air pressure. current actuator has two technical points interest; control method driving direction operating pressure level, requiring match these po...

Abstract Nylon cord rubber has the advantages of small residual deformation and is easy to lift lower tubing string in low-permeability oil gas reservoirs. However, it associated with low-pressure resistance poor sealing performance. To enhance performance nylon rubber, a three-dimensional numerical model was established its accuracy experimentally determined. The Plackett–Burman test, Steepest...

Tire/road interactions play a critical role in safe operation of ground vehicles. This paper presents the modeling, analysis, and experimental studies of stick–slip interactions between the stationary tire and the firm road. A semi-analytical model is first proposed to predict the normal force distribution on the tire contact patch. A beam–spring network modeling approach is then used to captur...

In the presented work, a non linear effect of rubber referred as Fletcher-Gent effect or Payne effect is investigated. It leads to a change in the rubber dynamic modulus with vibration amplitudes and, consequently, modifies resonance frequencies of mechanical systems including non linear elastomers. In this study a new methodology is developed to take into account Payne effect in a linear visco...