Modelling and experimental validation of dynamic impact in 1:9 railway crossing panel

Ma, Yunxiang; Mashal, Abdul Ahad; Markine, Valéri

doi:10.1016/j.triboint.2017.09.036

Cited by 33 publications

(33 citation statements)

References 37 publications

(105 reference statements)

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“…This contraction leads to differences in size between the edges, neighbors and the occlusion area. With the help of indirect methods, the thermal and chemical risks of the teeth and mucous membranes were eliminated, and the crown's adaptation to teeth was improved as the aggregation process occurred on the stones (Figure c, d) …”

Section: Applications Of 3d Printing In Dentistrymentioning

confidence: 99%

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3D Printing and Digital Processing Techniques in Dentistry: A Review of Literature

et al. 2019

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In recent years, the rapid development of 3D printing technologies lead to its new applications in the area of healthcare and medicine, including dentistry, orthopedics, cardiovascular, pharmaceutics, neurosurgery, engineered tissue models, medical devices, and anatomical models. Dentistry is widely acknowledged to benefit from 3D printing technologies due to its needs for the customization and personalization of dental products. In this review, the authors discuss and summarize various 3D imaging technologies and the recent advances of 3D digital processing techniques in dentistry in an effort to give a new perspective and greater understanding of the current development of 3D printing technologies in dentistry. It is anticipated that this review will explore why 3D printing is important to dentistry, and why dentistry motivates development in 3D printing applications. Further, current challenges and further perspectives are also discussed which helps researchers to optimize the 3D printing technology in dentistry, improve 3D printing strategies, and direct future dental bioprinting and translational applications.

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Section: Applications Of 3d Printing In Dentistrymentioning

confidence: 99%

“…b) Cross‐sectional image in buccolingual direction. c) 3D printing system (Stratasys), d) Manufactured crown …”

Section: Applications Of 3d Printing In Dentistrymentioning

confidence: 99%

3D Printing and Digital Processing Techniques in Dentistry: A Review of Literature

et al. 2019

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“…For instance, it was found that the multi body simulation, having a resolution range over 500 Hz, consumed a significant amount of time and resources [25] whereas rail irregularities range up to 2000 Hz [26]. As a consequence, particular studies [14,[27][28][29] use quite detailed FEM (Finite Element Method) models to increase accuracy in the estimation of the contact forces. These FEM models require more computational power than MBS models, but their accuracy is higher and allows stress-strain level investigations on the contact patch.…”

Section: Geometry and Materials Propertiesmentioning

confidence: 99%

“…In other words, a specific location rather than a whole turnout is selected to investigate the dynamic behavior. There have been recent attempts to deal with computational costs [27,30] which, while promising, are still insufficient to expand the simulation scale.…”

Section: Geometry and Materials Propertiesmentioning

confidence: 99%

New Insights from Multibody Dynamic Analyses of a Turnout System under Impact Loads

et al. 2019

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A railway turnout is an essential infrastructure for managing railway traffic flexibility. In contrast, it imposes restrictions on train operations such as lower operational speeds through the turnout due to the complex movements of trains over the turnout. This results in the large-amplitude dynamic responses of the train-turnout interaction. Previous studies have focused on the train-turnout interactions entailing the wheel-rail contact forces and stresses. Very few of the studies considered the effects of the contact forces on the turnout structure and its components such as sleepers and bearers. Those previous studies neglected the dynamic forces and estimated the behavior of train-turnout interactions based on quasi-static calculations. In reality, turnouts are subjected to high impact forces, which can be higher than the permissible track forces. Consequently, a numerical model capable of determining impact forces was developed here, to evaluate the dynamic behaviors of a railway turnout and their effects on such turnout components as bearers, ballast, and so on. The model consists of a structured beam grillage laying on an elastic foundation with rigid wheelsets and a bogie. The model was verified by field measurements. The new insight stemmed from this study shows that neglecting the contribution of dynamic forces can result in the unsafe underestimation of train turnout behaviors.

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“…The term 'efficient' here means the contact model is capable of solving nonelliptic rolling contact accurately and fast, because wheel-rail damage simulation such as wear prediction always needs millions of contact cases to account for the actual operating distance. To this end, exact contact models based on finite element method [1][2][3][4][5][6][7][8][9] are often not feasible due to their relatively high computational cost. In general, the contact problem can be treated in normal and tangential direction independently since the wheel and rail have similar material properties.…”

Section: Introductionmentioning

confidence: 99%

Applying Two Simplified Ellipse‐Based Tangential Models to Wheel‐Rail Contact Using Three Alternative Nonelliptic Adaptation Approaches: A Comparative Study

Wang

Zhou

et al. 2019

Mathematical Problems in Engineering

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In the modeling of railway vehicle-track dynamics and wheel-rail damage, simplified tangential contact models based on ellipse assumption are usually used due to strict limitation of computational cost. Since most wheel-rail contact cases appear to be nonelliptic shapes, a fast and accurate tangential model for nonelliptic contact case is in demand. In this paper, two ellipse-based simplified tangential models (i.e., FASTSIM and FaStrip) using three alternative nonelliptic adaptation approaches, together with Kalker's NORM algorithm, are applied to wheel-rail rolling contact cases. It aims at finding the best approach for dealing with nonelliptic rolling contact. Compared to previous studies, the nonelliptic normal contact solution in the present work is accurately solved rather than simplification. Therefore, it can avoid tangential modeling evaluation affected by inaccurate normal contact solution. By comparing with Kalker's CONTACT code, it shows both FASTSIM-based and FaStrip-based models can provide accurate global creep force. With regard to local rolling contact solution, only the accuracy of FaStrip-based models is satisfactory. Moreover, Ayasse-Chollet's local ellipse approach appears to be the best choice for nonelliptic adaptation.

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Modelling and experimental validation of dynamic impact in 1:9 railway crossing panel

Cited by 33 publications

References 37 publications

3D Printing and Digital Processing Techniques in Dentistry: A Review of Literature

3D Printing and Digital Processing Techniques in Dentistry: A Review of Literature

New Insights from Multibody Dynamic Analyses of a Turnout System under Impact Loads

Applying Two Simplified Ellipse‐Based Tangential Models to Wheel‐Rail Contact Using Three Alternative Nonelliptic Adaptation Approaches: A Comparative Study

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