Power hop is a “porpoising” type of pitch/bounce oscillation superimposed on the forward motion of tractors equipped with pneumatic tires. It is most often observed with tractors having two powered axles pulling towed implements in moderate to high draft field operations on dry soils. As power hop begins, the tractor exhibits gradually increasing vibration amplitudes until the operator, of nece...

Tire/wet road friction depends on two road-surface texture scales: the macrotexture (centimeterto millimeter dimensions) is responsible for the speed dependency of friction, and the microtexture (submillimeter dimensions) is responsible for the friction level at any speed. This paper deals firstly with the description of road-microtexture, the macrotexture scale being well documented. Consideri...

Background & objectives: Environmental pollutants have detrimental effects on the reproductive function of human being and of animals. This study was aimed at evaluating the effects of tire debris, a fraction of particulate matter derived from tire wear, on motility and morphology of human spermatozoa. Methods: spermatozoa from ten healthy men were incubated for 4 hours with 10, 50 and 75 μg/ml...

With many years of construction and application of common concrete, researchers have always been searching for a better composition. One of the notable ideas for achieving such a composition is using recycled materials. One of the materials which is suitable for environment and constant development is damaged tires .For studying mechanical properties of concrete containing tire particles, a ser...

According to fuzziness and complexity of mechanism wear fault,a kind of intelligent diagnosis system for mechanism wear fault based on fuzzyneural network is put forward. The structure and learning method of fuzzyneural network are introduced. This paper analysises how to create the characteristic vector of wear particles and standard wear particles spectrum by combine the characteristics of me...

Although traffic exhaust emissions in Europe have been drastically reduced, airborne particle caused by brakes and tires are still increasing with the number of vehicles. The measurement non-exhaust is an emerging technological challenge. We present a custom setup to investigate brake- tire-wear in-use battery electric vehicle. A separate brake housing HEPA ventilation enabled wear be measured ...

The importance of wear particle characterization for orthopaedic implants has long been established in the hip and knee arthroplasty literature. With the increasing use of motion preservation implants in the spine, the characterization of wear debris, particularly metallic nature, is gaining importance. An accurate morphological analysis of wear particles provides for both a complete characteri...

Tires manufactured from polyurethane (PU) have been espoused recently for reduced hysteretic loss, but the material provides poor traction or poor wear resistance in the application, requiring inclusion of a traditional vulcanized rubber tread at the contact surface. The tread can be attached by adhesive methods after the PU body is cured, or the PU can be directly cured to reception sites on t...

Abrasion of tire wear is one the largest sources microplastics to environment. Although most particles settle into soils, studies on their ecotoxicological impacts terrestrial environment are scarce. Here, effects (<180 μm) three ecologically relevant soil invertebrate species, enchytraeid worm Enchytraeus crypticus, springtail Folsomia candida and woodlouse Porcellio scaber, were studied. Thes...

Based on heavy aircraft main landing gear tires touchdown skidding process, patents have been registered since the 1940s to improve tire safety, decrease the substantial wear and smoke that results from every landing by spinning the rear wheels before touchdown. A single wheel has been modeled as a mass-spring-damper system using ANSYS mechanical transient simulation to analyze static and pre-r...