Query: Non pneumatic tyres

title: MODELING AND ANALYSIS OF NON PNEUMATIC TYRES WITH DIFFERENT DESIGN STRUCTURES USING FEM METHOD
abstract: A conventional tyre is made up of air enclosed rubber packed by means of compressed air. Conventional tyres over period have been dominating the world marketplace because it exhibits ride excellence and robustness. But it has a disadvantage such as burst out while driving, compound manufacturing method, the necessity to keep interior pressure. An innovative technology is under advancement to exploit only one of its kind blends of materials and geometry that does not need compressed air to hold up the load. Hence Non pneumatic tyres were introduced. Non pneumatic tyre is a submissive of cellular flexible spoke component which acts as air of a traditional tyre. In this project we replace conventional alloy wheel by flexible spoke structure. We investigated different spokes structure i.e. Honeycomb spokes structure, Triangle spokes structure, Plate spokes structure and Curved spokes structure for Nonpneumatic tyre by applying uniaxial load and rotational velocity. The spokes experience tension as well as compression while they are rolling. Non pneumatic tyres are designed in CATIA workbench and analysis is done using ANSYS workbench and finally carried out the equivalent stresses, strains, deformations, shear stresses. Model analysis is also carried out and then finding out the suitable design for Non pneumatic tyres.

title: Effect of Carbon Nanotubes on Characteristics Performance of Non Pneumatic Tyres
abstract: Extensive studies have been proposed for on/off road light and heavy equipment non Pneumatic Tyres (NPTs) due to their advantages over the traditional pneumatic tyre in low rolling resistance, flat proof, low maintenance. Many studies were focusing on the elastomer material asthe primary material using in NPT. In this paper, NPT finite element (FE)model with honeycomb spokes containingpolyurethance/carbon nanotubes (PU/CNTs) is investigated. The NPT static behaviour of vertical stiffness, and contact pressure are studied. Rolling resistance and dynamic shear stress are also studied. The parametric study shows that PU/CNT makes a significant effect on rolling resistance.

title: Modeling and Analysis of Non Pneumatic Tyres with Hexagonal Honeycomb Spokes
abstract: A pneumatic tyre is made of an airtight inner core filled with pressurized air. Pneumatic tyre have been dominant in the world market due to many advantages like low mass design, low vertical stiffness and low contact pressure. However, it have certain disadvantages like the possibility of a flat while driving, complex manufacturing procedure, the required maintenance for proper internal air pressure. Hence Non Pneumatic tyres are introduced to overcome these disadvantages. Non pneumatic tyres (NPT) are introduced with a compliant cellular solid spoke component which functions as air of a pneumatic tire. This project investigates hexagonal honeycomb spokes for NPT tire under macroscopic uni axial loading. The spokes of an NPT undergoes tension compression cycle while the tyre rolls. The spokes of an NPT is required to have both stiffness and resilience, which are conflicting requirements. Three types of honeycomb spokes are designed in AUTOCAD, namely A, B and C. Three dimensional models are created in CATIA. The mass of the designed tyres are found out. ANSYS finite element analysis is used to study about the deformation and stresses developed in different type of honeycomb spokes. Type C honeycomb spokes are found to be better considering both fatigue resistance and lower mass design.

title: NON PNEUMATIC TYRES

title: Numerical modelling of Big Tyres patented non pneumatic wheel concept
abstract: Big Tyre Pty Ltd has recently patented a non pneumatic tyre assembly (International Publication No. WO 2006/116807) which it hopes will revolutionise the underground mining industry by eliminating the disadvantages associated with current tyre options. Numerical methods have so far proven insufficient to best approximate the static be haviour of the wheel; the first prototype/proof of concept having been constructed without positive finite element analysis (FEA) results. The prototype behaves as expected at low loads, but is not performing well under the high tonnage loads for which it is designed. Before a second prototype can be constructed, numerical models need to be devised to accurately simulate both static and dynamic behaviours of the already constructed prototype. The FEA model requires non linear large displacement analysis; current models requiring in excess of 33hours solve time. Thus, there is a requirement for a more streamlined modelling approach. This project aims to develop a series of numerical models to streamline the engineering, and predict the static performance of BIG TYREs patented non pneumatic wheel assembly for varying geometries and material properties.

title: Experimental research in automobile non pneumatic tire force heterogeneity
abstract: Simplicity and high efficiency of a wheeled mover as a mechanism for converting rotational motion into a translatory one have conditioned its wide application in overland machines including motor vehicles. However a wheel with a non pneumatic tyre (NPT) has a sufficient drawback lying in termination of a wheeled machine movement at the excess air pressure loss. Moreover, the loss of excess air pressure in a pneumatic tyre of traditional design at high speed of movement of a motor vehicle can lead to a traffic accident with heavy consequences. The stop of a motor vehicle to change a wheel on a heavy traffic roadway or roadside also poses a threat. These reasons determine the necessity of both well known design improvements and search for the new wheeled mover design solutions to enhance a motor vehicle safety, the use of wheels with non pneumatic tyres of elastic polymeric materials being one of them. Safety enhancement by means of non pneumatic tyre use along with keeping the high performance of wheeled machine operational properties, is an important scientific and technical task that determines the research urgency. Non pneumatic tyres of elastic polymeric materials were first applied in 1991 to wheeled armored machinery by South African company Allthane Technologies International SA (Pty) Ltd. A significant contribution to creation and improvement of non pneumatic tyres was made by such companies as Uniroyal  Michelin [2 4] Resilient Technologies  in common with the University of Wisconsin Madison's Polymer Engineering Center, Polaris [6] Yokohama  Bridgestone   Toyo  Boeing [11] Amerityre  Sumitomo [13] Britek  and others. Russia's research on non pneumatic wheeled movers are conducted by Vescom Research Centre for Tire Industry LLC, Bauman Moscow State Technical University, South Ural State University, Alekseyev Nizhny Novgorod State Technical University and others. The Department of Automobile Transport (Department of Machine Building and Transport since May 2018) at Bratsk State University has experience in development and research on automobile non pneumatic tyres of elastic polymeric materials. The implemented design analysis and patent search allowed to find new technical solutions aimed at the perfection of automobile non pneumatic tyre design, develop and engineer scientifically based modulus and, enjoying the financial backing of Ministry of Corresponding author: mazurvv@yandex.ru (c) The Authors, published by EDP Sciences.  (2018) https:/doi.org/10.1051/matecconf/201822402019 ICMTMTE 2018

title: Design and analysis of non pneumatic tyre
abstract: Non Pneumatic Tyre (NPT) as the name suggests is a type of tyre that doesn't use air to support the load. Even though tyres made out of solid rubber exists, they don't have enough compliance and will not provide a supple ride if used in normal vehicles. The NPT discussed here consists of mainly three parts. A rigid hub, Deformable spokes that support vertical load, Reinforced shear band and tread made out of rubber which comes into contact with the surface. The properties of NPT like contact pressure, rolling resistance and load carrying capacity can be varied by altering the dimensions or materials used to manufacture NPT. Several researches are being carried out all over the globe to make NPT an alternative to the conventional pneumatic tyre. This paper consolidates an overview of the research works that were carried out to develop and improve NPT.

title: Design and Analysis of Non Pneumatic Tyre (NPT) With Honeycomb Spokes Structure
abstract: A conventional tyre is made up of air enclosed rubber packed by means of compressed air. Conventional tyres over period have been dominating the world marketplace because it exhib its ride excellence and robustness. But it has disadvantaged such as burst out while driving, compound manufacturing method, the necessity to keep interior pressure. An innovative technology is under advancemen t to exploit only one of its kind blends of materials and geometry that does not need compressed air to hold up the load. Hence non pneumatic tyres were introduced. Non pneumatic tyre is a submissive of cellu lar flexib le spoke component which acts as air of a traditional tyre. In this project we replace conventional alloy wheel by flexib le spoke structure. We investigated hexagonal honeycomb along spokes designed for non pneumatic tyre by applying uni axial load. The spokes experience tension as well as compression while they are rolling. So spokes required to have stiffness and rigidity. Non pneumat ic tyre are designed in ANSYS Workbench, (1) honeycomb tyre. ANSYS fin ite element analysis is worn to find deformation and stress in. Honeycomb tires are established to be superior in terms of fatigue resistance and durability.

title: Pattern design of a non pneumatic tyre for stiffness using topology optimization
abstract: Non pneumatic tyres have been developed and are being investigated, but are not very prevalent. Many design studies are still needed from the viewpoint of material, pattern, and structures. However, no systematic research for such important design issues has been reported in the literature up to now. In this article, topology optimization was utilized to determine optimal topological patterns of non pneumatic tyres in the design process, with the goal of matching the static stiffness of the current pneumatic tyres. Under this optimization formulation with weighted compliance and a volume constraint, several different patterns were obtained depending on the number of sections, volume fraction, and weighting factors. Among them, three representative patterns were chosen and analysed for possible applications under working conditions. This article proposes a systematic and efficient tool for designing the topological patterns of non pneumatic tyres.

title: Thermo mechanical analysis of non pneumatic rubber tyres.