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You searched for subject:(tire rolling resistance). Showing records 1 – 2 of 2 total matches.

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KTH

1. Conte, Francesco. Expanding the brush tire model for energy studies.

Degree: Vehicle Dynamics, 2014, KTH

Considering the more and more important issues concerning the climate changes and the global warming, the automotive industry is paying more and more attention to vehicle concepts with full electric or partly electric propulsion systems. The introduction of electric power sources allow the designers to implement more advanced motion control systems in vehicle, such as active suspensions. An example of this concept is the Autonomous corner module (ACM), designed by S. Zetterström. The ACM is a modular based suspension system that includes all features of wheel control, such as control of steering, wheel torque and camber individually, using electric actuators. With a good control strategy it is believed that is it possible to reduce the fuel consumption and/or increase the handling properties of the vehicle. In particular, camber angle has a significant effect on vehicle handling. However, very few efforts have been done in order to analyse its effects on tire dissipated energy. The aim of this study is to develop a new tire model, having as starting point the simple Brush Tire model, in order to analyse the tire behaviour, in terms of forces generated and energy dissipated, for different dynamic situations. In order to reach this scope, the characteristic equations of the rubber material are implemented in a 3D Multi-Line brush tire model. In this way the energy dissipated, thus the rolling resistance force, can be studied and analysed, considering also the tire geometry. From the results of this work it is possible to assert that the angular parameters (e.g. camber angle) affect the power losses in rolling tires, as well as the tire geometry influences their rolling resistance. Thus, using a good control strategy, it is possible to reduce the power losses in tires.

Subjects/Keywords: Multi-Line Brush Tire model; Masing model; rolling resistance

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Conte, F. (2014). Expanding the brush tire model for energy studies. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-164284

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Conte, Francesco. “Expanding the brush tire model for energy studies.” 2014. Thesis, KTH. Accessed April 19, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-164284.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Conte, Francesco. “Expanding the brush tire model for energy studies.” 2014. Web. 19 Apr 2021.

Vancouver:

Conte F. Expanding the brush tire model for energy studies. [Internet] [Thesis]. KTH; 2014. [cited 2021 Apr 19]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-164284.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Conte F. Expanding the brush tire model for energy studies. [Thesis]. KTH; 2014. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-164284

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


University of Illinois – Urbana-Champaign

2. Hernandez, Jaime Alberto. Development of deformable tire-pavement interaction: contact stresses and rolling resistance prediction under various driving conditions.

Degree: PhD, Civil Engineering, 2015, University of Illinois – Urbana-Champaign

Even though continuous improvements have been seen in the analysis of flexible pavements, one of the most important factors is still oversimplified: the tire. This can result in costly decisions, such as poor structural road design, incorrect damage prediction, and inappropriate adoption of maintenance/rehabilitation techniques. Moreover, accurate analysis of the tire-pavement system improves predictions of rolling resistance, fuel consumption, and greenhouse gas emissions. The main contribution of this research lies in the evaluation of tire and pavement as a semi-coupled system, assuming both are deformable bodies, while focusing on contact stresses, rolling resistance, and pavement responses. In addition to load and tire inflation pressure, temperature, speed, and rolling conditions were considered. A series of necessary advancements in the tire model, such as appropriate material characterization (hyperelastic and visco-hyperelastic), accurate geometry, and model validation using experimental measurements, were implemented. The experimental program provided information for validation (contact area, tire deflection, and contact stresses/loads). In addition, based on the experimental measurements, a procedure including analytical expression was proposed to predict the variation of the vertical and transverse contact loads along the contact length. Four tire finite element (FE) models having accurate geometry and material characterization were developed to predict contact stresses and rolling resistance force. First, a hyperelastic tire was used on a rigid surface to predict contact stresses under various rolling and loading conditions. Second, the influence of tire speed and temperature was investigated using a visco-hyperelastic tire rolling on rigid surface. Third, hyperelastic tire on deformable elastic body was used to assess the sensitivity of the contact stresses to the body's stiffness. Fourth, the relevance of surface temperature and tire speed was determined using a hyperelastic tire on a deformable viscoelastic body. Finally, the deformable tire and pavement model were integrated to evaluate critical pavement responses, rolling resistance force, and structure-induced rolling resistance. Vertical and transverse contact loads for all conditions and longitudinal contact stresses at full braking were successfully fitted to analytical expressions, thus easing their potential application in pavement analysis. Based on the hyperelastic tire FE results, the vertical contact stresses were unaffected by traveling speed and rolling condition, and the rolling condition mainly modified the longitudinal contact stresses. After altering the rubber component’s material model to visco-hyperelastic, the contact area increased 6.8% due to temperature and decreased 3.8% due to speed. In addition, longitudinal contact stresses were the most affected by temperature and speed: increments in peak value caused by speed were as high as 17%, and the reduction caused by temperature reached 33.1%. On the other hand,… Advisors/Committee Members: Al-Qadi, Imad L (advisor), Al-Qadi, Imad L (Committee Chair), Little, Dallas (committee member), Masud, Arif (committee member), Ozer, Hasan (committee member), Radulescu, Robert (committee member), Thompson, Marshall (committee member).

Subjects/Keywords: Tire-pavement interaction; pavement responses; rolling resistance; contact stresses; finite element modeling

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Hernandez, J. A. (2015). Development of deformable tire-pavement interaction: contact stresses and rolling resistance prediction under various driving conditions. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/89127

Chicago Manual of Style (16th Edition):

Hernandez, Jaime Alberto. “Development of deformable tire-pavement interaction: contact stresses and rolling resistance prediction under various driving conditions.” 2015. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 19, 2021. http://hdl.handle.net/2142/89127.

MLA Handbook (7th Edition):

Hernandez, Jaime Alberto. “Development of deformable tire-pavement interaction: contact stresses and rolling resistance prediction under various driving conditions.” 2015. Web. 19 Apr 2021.

Vancouver:

Hernandez JA. Development of deformable tire-pavement interaction: contact stresses and rolling resistance prediction under various driving conditions. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2015. [cited 2021 Apr 19]. Available from: http://hdl.handle.net/2142/89127.

Council of Science Editors:

Hernandez JA. Development of deformable tire-pavement interaction: contact stresses and rolling resistance prediction under various driving conditions. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/89127

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