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Journal ArticleDOI

Design and analysis of non-pneumatic tyre

01 Nov 2017-Vol. 263, Iss: 6, pp 062061
TL;DR: The NPT discussed in this article consists of 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.
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.
Citations
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Proceedings ArticleDOI
04 Mar 2019
TL;DR: Prepared numerical model of non-pneumatic tire represent the solution available on the commercial market and the shapes of the NPT contact areas were recorded on the rigid ground.
Abstract: In this article non-pneumatic tires (NPT) subject area was taken. This term (NPT) must be understood as the specific structure, which provide appropriate quasi-static and dynamic characteristics (to compare with pneumatic tire) without necessity to maintain a compressed gas or liquid under a certain pressure. Prepared numerical model of non-pneumatic tire represent the solution available on the commercial market. The validation of the model was carried out the own experimental research results. During the numerical research of the non-pneumatic tire model, simulations of the normal force loading with different values were carried out, the shapes of the NPT contact areas were recorded on the rigid ground.

8 citations

Journal ArticleDOI
12 Oct 2021-Energies
TL;DR: In this article, the influence of the geometry of the NPT's loadbearing structure on its quasi-static directional characteristics was investigated. But the results of the experiments were limited to a single obstacle.
Abstract: The non-pneumatic tire (NPT) is a type of wheel whichdevelopment is related to the beginning of automotive development. The non-pneumatic tire (NPT) is a type of tire that does not contain compressed gases or fluid to provide directional control and traction. Nowadays, this type of wheel is more and more often used in special purpose vehicles, e.g., in military vehicles and working machines. The main feature of the non-pneumatic tire is a flexible support structure (including the part of the wheel between the tread and the rim). This paper presents the results of research aimed at determining the influence of the geometry of the NPT’s (intended for All-Terrain Vehicle–ATV/Utility Task Vehicle–UTV) load-bearing structure on its quasi-static directional characteristics. The experimental tests included the determination of the radial stiffness of research objects on a non-deformable flat surface and on a single obstacle, as well as the determination of the degree of deformation for the elastic structure and belt. The significant influence of the elastic structure’s shape and the elastomer, as the material forming the NPT, on its radial stiffness was revealed.

5 citations

Journal ArticleDOI
TL;DR: The analysis shows that the in-wheel suspension system improves comfort (road filtering) of more than 20% on all tested road surfaces, but at the same time reduces the vehicle efficiency of about 14%.

3 citations

References
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Journal ArticleDOI
TL;DR: In this paper, the mechanical properties of two-dimensional cellular materials, or honeycombs, are analyzed and compared with experiments, in terms of bending, elastic buckling and plastic collapse of the beams that make up the cell walls.
Abstract: The mechanical properties (linear and nonlinear elastic and plastic) of two-dimensional cellular materials, or honeycombs, are analysed and compared with experiments. The properties are well described in terms of the bending, elastic buckling and plastic collapse of the beams that make up the cell walls.

1,567 citations

Journal ArticleDOI
TL;DR: In this paper, the elastic properties of the unfilled sheet and the composite under in-plane direct loading and out-of-plane bending are investigated. And the plastic deformation characteristics under in plane direct loading are also considered, in which a low modulus infill is used.

174 citations

Journal ArticleDOI
TL;DR: The Tweel as discussed by the authors is a non-pneumatic structure that exhibits four critical characteristics that led to the success of the pneumatic tire: low energy loss on rough surfaces, low vertical stiffness, low contact pressure and low mass.
Abstract: The pneumatic tire has proven to be the dominant design for rolling transport since shortly after its invention by John Boyd Dunlop in 1888. This paper identifies four critical characteristics that led to the success of the pneumatic tire: low energy loss on rough surfaces, low vertical stiffness, low contact pressure, and low mass. A non-pneumatic structure is proposed that exhibits these four critical characteristics while breaking some of the most restrictive design constraints imposed by pneumatic mechanics. This structure consists of a circular beam composed of two inextensible membranes separated by a relatively low modulus elastic material. The beam is connected to a hub by thin elastic spokes. This structure forming an integrated tire∕wheel is called a Tweel™.

125 citations

Journal ArticleDOI
TL;DR: In this article, the elastic limits of hexagonal honeycomb spokes for a high fatigue resistance design are investigated by seeking compliant hexagonal structures that have low local stresses under macroscopic uni-axial loading.

107 citations

Journal ArticleDOI
TL;DR: In this paper, a porous shear band made of a porous, fiber-reinforced elastomer is explored to reduce the rolling resistance of a nonpneumatic tire.
Abstract: The shear band is the critical component of a nonpneumatic tire (NPT) when determining the rolling resistance resulting from the elastomer's shear friction. In an effort to reduce the rolling resistance of an NPT, a shear band made of a porous, fiber-reinforced elastomer is explored. The porous shear band is designed to have the same effective shear modulus as the shear modulus of a continuous shear band. The originality of the study in this article is in the design of a flexible, porous solid for fuel efficiency of a tire structure by including a low viscoelastic energy loss material—a carbon fiber that partially replaces the volume of high viscoelastic energy loss material—polyurethane. To make the NPT structure remain flexible, porous volumes were included. Finite element (FE)–based numerical experiments with ABAQUS were conducted to quantify the reduced energy loss of an NPT using hyperelastic and viscoelastic material models. Load carrying capacity of the NPT with the designed porous shear ...

44 citations