Development of a computationally efficient rolling truck tyre model using part-composite approach and its verification

Shokouhfar, Shahram; Rakheja, Subhash; El–Gindy, Moustafa

doi:10.1504/ijvsmt.2016.077929

Cited by 4 publications

(5 citation statements)

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“…18 To further improve the simulation accuracy of the simplified tire model, beam elements are added to the tire model to model the reinforced cords. 17,19,20 These simplified tire models have already been proved to have good overall correlation with the experiments. [17][18][19][20] However, as the simplified tire model contains shell element, which is too different from the actual structure of the tire, it may results in the calculation efficiency reducing due to the excessive deformation of the shell elements.…”

Section: Introductionmentioning

confidence: 83%

“…17,19,20 These simplified tire models have already been proved to have good overall correlation with the experiments. [17][18][19][20] However, as the simplified tire model contains shell element, which is too different from the actual structure of the tire, it may results in the calculation efficiency reducing due to the excessive deformation of the shell elements. 21 Furthermore, the material parameters of the simplified tire model are obtained from a large number of test, which is not convenient for the application of the model.…”

Section: Introductionmentioning

confidence: 83%

“…where n 0 12 is the Poisson's ratios of the equivalent belt. Substituting equation ( 17) into (20), the belt equivalent material parameters E 0…”

Section: Equivalent Belt Analysismentioning

confidence: 99%

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Calculation method of belt material parameters for finite element tire model

Zhang

Wang

2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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The radial tire belt is composed of multi-layered fiber-reinforced cords with a very complex structure. Restricted by the computing speed, the simplified finite element (FE) tire model with equivalent belt is usually applied in the vehicle dynamic simulation. However, it is always difficult to obtain the material parameters of the equivalent belt. In this paper, a calculation method of equivalent belt material parameters for the simplified FE tire model is proposed based on the three-dimensional (3-D) anisotropic elasticity of the cord reinforced composites. The simulation results of the static radial stiffness, modal characteristics, and dynamic responses for the simplified FE tire model with parameters obtained by the calculation method were compared with experiment results. The results show that the deviation between the experiment and simulation is acceptable, and the validity of the calculation method is verified.

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Section: Introductionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 83%

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Calculation method of belt material parameters for finite element tire model

Zhang

Wang

2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…The coefficient of friction between the dummy and the car was demonstrated to have a remarkable effect on trajectories and head impact time and was therefore set to 0.3, which is in accordance with IOP Publishing doi:10.1088/1757-899X/1306/1/012034 5 several studies [6,18,20,30,31]. A friction coefficient of 0.8 was assumed for the tire-ground contact to represent a dry asphalt road [32][33][34]. The thrown trajectories were recorded until the first interaction between the rider's head and the OV.…”

Section: Simulation Set-upmentioning

confidence: 99%

Influence of car front-end designs on motorcyclists’ trajectory in head-on and side-on-head crashes

Perticone,

Nardomarino,

Baldanzini

2024

IOP Conf. Ser.: Mater. Sci. Eng.

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Motorcyclists are highly vulnerable road users, and cars are one of their primary crash opponents. This study investigates the influence of car front-end designs on motorcyclist trajectory in head-on and side-on-head crashes. The analysis is based on a dataset of 120 multi-body crash simulations conducted using MADYMO and post-processed with MATLAB. An analysis of 1412 real-world Powered Two-Wheeler (PTW) to car accidents was conducted to determine the most common crash configurations and the associated ranges of the variables, such as vehicle speeds and contact points. Three PTW styles (sport-touring, scooter, and sport) and four car front-end designs (Sport utility vehicle (SUV), Family Car/Sedan (FCR), Roadster (RDS), and Multi-purpose vehicle (MPV)) were considered. The study examined the riders’ thrown distance in both collision types. It was observed that, regardless of the collision type, the head was identified overall as the primary body region coming into contact with the opposing vehicle, followed by the chest and neck. In frontal collisions, an augmented bonnet height corresponded to an increased incidence of head contact, whereas a lower bonnet height resulted in a higher frequency of chest contact. Moreover, the thrown distance depended also on PTW speed, particularly for sport and sport-touring motorcycles. Notably, contact with the car windscreen was only observed at velocities exceeding 60 km/h, whereas impact with the bonnet leading edge occurred exclusively below this threshold. Due to the shielding effect of their PTW’s fairing, scooter riders predominantly experienced no contact with the opposing vehicle. Sport-touring motorcycles exhibited a more vertical trajectory upon ejection, leading to a greater likelihood of overturning and subsequent rearward head impact with the vehicle. In contrast, sport motorcycles tended to forward projections with a high likelihood of chest contact. In the case of lateral impacts, it was observed that vehicles with a more prominent profile, such as SUVs and MPVs, equipped with protruding bumpers, effectively restrained riders. In this case, vehicle speed did not exert a significant influence on the thrown distance. Additionally, the presence of a conspicuous fuel tank and the initial posture of the rider on the PTW played a crucial role in determining the final thrown distance. Due to their upright postures and the absence of a pronounced fuel tank, scooter dummies were thrown further than others, thus causing head contact with the windscreen. These findings highlight the importance of car front-end design and PTW fairings in mitigating riders’ injuries and provide valuable insights to vehicle manufacturers for developing tailored safety measures for riders.

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“…169-173]) is used instead. This element is also reported to be used in studies by Barsotti [4] and Shokouhfar et al [18]. Due to full integration, hourglass modes will not be present in the tire with the exception of transverse shear modes that will be damped using hourglass control type 8 with a coefficient of 0.1 [6; 12 p. 1506].…”

Section: Number Of Elements [Thousands]mentioning

confidence: 99%

Transient load simulation of forwarder rear frame

Sormunen¹

2017

RakMek

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Summary. One difficulty in the design of the load bearing components of mobile machines is the transient and non-linear nature of the loads acting on them. A common method for tracking these loads is to use strain gauges and force transducers on a physical test machine. An alternative method for determining the transient loads by means of a mathematical model that intends to describe the response of a John Deere 1010E forwarder as it crosses a test track is utilized in this study. The model is based on finite element method and it is solved using explicit time integration and LS-DYNA® software. As a result of this study a model capable of replicating the real world with a reasonable accuracy was obtained. The forces acting on tires, which can be considered the most important results of this work, can be used as boundary conditions in consequent analyses, such as fatigue simulation.

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Development of a computationally efficient rolling truck tyre model using part-composite approach and its verification

Cited by 4 publications

References 0 publications

Calculation method of belt material parameters for finite element tire model

Calculation method of belt material parameters for finite element tire model

Influence of car front-end designs on motorcyclists’ trajectory in head-on and side-on-head crashes

Transient load simulation of forwarder rear frame

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