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Author: Shahriar Parisouz Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Modelling tyre behaviour has been a challenge for many years and even after an extensive research it is almost impossible to predict tyre behaviour only by considering the material properties of its components and the conditions of the environment. The aim of this research was to develop a model, which accurately represents rubber frictional behaviour under different contact pressures and sliding velocities. In this research, two experimental facilities - pin-on-disc and rotational-pin-on-disc, have been designed and manufactured to measure rubber friction. The main test rig (rotational-pin-on-disc) was calibrated and a code for processing the data was developed. Various series of tests have been conducted on different surfaces including steel and sandpapers. A friction model dependent on major parameters of the system (id est velocity and contact pressure) was generated. Finite Element Analysis (FEA) is commonly used in tyre simulations and in this modelling, constant friction coefficient is normally used, however this can lead to inaccuracies. A 3D tyre model was developed and the friction coefficients were employed in the model. The tyre was modelled in free rolling and then in steering. It was shown that with constant friction coefficient, cornering stiffness increases with increasing normal load. However, in the proposed friction models cornering stiffness increases with normal load up to a peak, after which it starts to decrease. This is in accordance with experimental evidence. In conclusion, considering the results of cornering stiffness, it is suggested to use the generated friction models when a tyre is simulated in FEA.
Author: Shahriar Parisouz Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Modelling tyre behaviour has been a challenge for many years and even after an extensive research it is almost impossible to predict tyre behaviour only by considering the material properties of its components and the conditions of the environment. The aim of this research was to develop a model, which accurately represents rubber frictional behaviour under different contact pressures and sliding velocities. In this research, two experimental facilities - pin-on-disc and rotational-pin-on-disc, have been designed and manufactured to measure rubber friction. The main test rig (rotational-pin-on-disc) was calibrated and a code for processing the data was developed. Various series of tests have been conducted on different surfaces including steel and sandpapers. A friction model dependent on major parameters of the system (id est velocity and contact pressure) was generated. Finite Element Analysis (FEA) is commonly used in tyre simulations and in this modelling, constant friction coefficient is normally used, however this can lead to inaccuracies. A 3D tyre model was developed and the friction coefficients were employed in the model. The tyre was modelled in free rolling and then in steering. It was shown that with constant friction coefficient, cornering stiffness increases with increasing normal load. However, in the proposed friction models cornering stiffness increases with normal load up to a peak, after which it starts to decrease. This is in accordance with experimental evidence. In conclusion, considering the results of cornering stiffness, it is suggested to use the generated friction models when a tyre is simulated in FEA.
Author: Gianfredo Romano Publisher: Cuvillier Verlag ISBN: 3736984758 Category : Technology & Engineering Languages : en Pages : 140
Book Description
Friction between rubber and rough surfaces is a complex topic which has been intensively studied during the recent years, due to its outstanding potential to realize products which can meet the always more and more demanding technological needs. In this work the fundamentals of rubber friction and contact mechanics have been investigated by use of advanced experimental methods and finite element analysis. The main objective of the thesis has been the hysteresis friction, since, in most cases, it is recognized to be the dominant factor. Specific friction tests have been developed to measure the deformation, occurring in the rubber sample during sliding friction, and correlate it with the measured hysteresis friction. In order to study the effects of different substrate morphologies on hysteresis friction a finite element model has been used. The finite element simulations have been validated by experimental measurements and turned out to be a useful tool to understand the friction mechanisms and predict the friction coefficient.
Author: Dieter Besdo Publisher: Springer Science & Business Media ISBN: 3642106579 Category : Science Languages : en Pages : 256
Book Description
Understanding elastomer friction is essential for the development of tyres, but also for sealings and other components. Thus it is of great technical importance. There are many aspects to modelling frictional processes in which an elastomer is interacting with a rough surface, ranging from theoretical formulations, leading to reduced and complex models, via numerical simulation techniques to experimental investigations and validations.
Author: Al Dorfmann Publisher: CRC Press ISBN: 9789058091130 Category : Technology & Engineering Languages : en Pages : 334
Book Description
This text aims to enable the experience accumulated by engineers and the research community in materials science, continuum mechanics and applied mathematics to be shared. In this way, the design and analysis of rubber components using the Finite Element Method should be enhanced.
Author: Nere Gil-Negrete Publisher: CRC Press ISBN: 1138000728 Category : Technology & Engineering Languages : en Pages : 734
Book Description
Due to their unique properties, rubber materials are found in multiple engineering applications such as tires, engine mounts, shock absorbers, flexible joints, seals, etc. Nevertheless, the complex nature of the behavior of such material makes it difficult to accurately model and predict the performance of these units. The challenge to correctly reproduce the observed characteristics of rubber elements necessitates detailed experimental investigations, development of accurate constitutive models, validation of techniques to identify material parameters and efficient numerical methods. Aspects regarding fatigue and damage in elastomers are not to be left aside, as they influence the durability of the products. State-of-the-art technology in terms of constitutive modeling, numerical implementation, damage and fatigue resistance are strongly represented in these Proceedings, along with insights into advanced elastomers to be used in novel applications. Topics included in this volume are: Ageing, Friction and abrasion, Adhesion, Swelling, Continuum mechanical models and numerical implementation, Hyperelasticity, Micro-mechanical approaches, Fracture and fatigue, Mullins effect, Strain induced crystallization, Thermal effects, Reinforcement and vulcanization, Design and applications, Smart elastomers. Constitutive Models for Rubber VIII is of interest not only for undergraduates, postgraduates, academics and researchers in the discipline, but also for all those design and development engineers in the industry.
Author: J. Busfield Publisher: CRC Press ISBN: 9789058095664 Category : Technology & Engineering Languages : en Pages : 468
Book Description
Recent developments in the modelling of rubber are collated in this volume, including not only stress-strain behaviour and the use of the large strain finite element method for simulation, but also fatigue, fracture, filler reinforcement, dynamic properties and the effects of ageing.
Author: Bertrand Huneau Publisher: CRC Press ISBN: 1000627772 Category : Technology & Engineering Languages : en Pages : 620
Book Description
Constitutive Models for Rubber XI is a comprehensive compilation of both the oral and poster contributions to the European Conference on Constitutive Models for Rubber. This 11th edition, held in Nantes (France) 25-27th June 2019, is the occasion to celebrate the 20th anniversary of the ECCMR series. Around 100 contributions reflect the state-of-the-art in the mechanics of elastomers. They cover the fields of: Material testing Constitutive modelling and finite element implementation Micromechanical aspects, and Durability (failure, fatigue and ageing) Constitutive Models for Rubber XI is of interest for developers and researchers involved in the rubber processing and CAE software industries, as well as for academics in nearly all disciplines of elastomer mechanics and technology.
Author: Shahriar Parisouz
Author: Shahriar Parisouz
Author: Shahriar Parisouz
Author: Gianfredo Romano
Author: Dieter Besdo
Author: Al Dorfmann
Author: Nere Gil-Negrete
Author: J. Busfield
Author: 
Author: Bertrand Huneau
Author: