Filters








57,552 Hits in 3.4 sec

On the use of the theory of critical distances with mesh control for fretting fatigue lifetime assessment

A. Zabala, D. Infante-García, E. Giner, S. Goel, J.L. Endrino, I. Llavori
2019 Tribology International  
This work analyses the viability of the theory of critical distances (TCD) using mesh control for fretting fatigue lifetime assessment.  ...  The outcome of the present study suggests that the TCD mesh control method can be extended to fretting fatigue problems by the reasonable assumption of setting the right element size proportional to critical  ...  Correlation between predicted and experimental lives for the TCD point method and the TCD with mesh control method for the four different data sets: (a) Al2024-T351 from Szolwinski and Farris [30] ;(b  ... 
doi:10.1016/j.triboint.2019.105985 fatcat:tqzc5ctiirbwthdkvmspk7wu7u

Gear noise prediction in automotive transmissions [chapter]

J. Bihr, M. Heider, M. Otto, K. Stahl, T. Kume, M. Kato
2014 International Gear Conference 2014: 26th–28th August 2014, Lyon  
Continuous research led to the development of an elaborate method for gear noise evaluation.  ...  Due to increasing requirements regarding the vibrational behavior of automotive transmissions, it is necessary to develop reliable methods for noise evaluation and design optimization.  ...  For the assessment of the excitation behavior of gears based on the stiffness calculations, several methods are used to determine the excitation characteristics.  ... 
doi:10.1533/9781782421955.457 fatcat:rxmycterozda7hsrtthi5eggby

Fracture Assessment of Quasi-brittle Rock Simulated by Modified Discrete Element Method

Sohrab Gheibi, Rune M. Holt
2020 Rock Mechanics and Rock Engineering  
The analysis was repeated for three other mesh sizes and the results are less mesh size dependent.  ...  Using the first methodology, MDEM can calculate stress intensity factors, K I and K II using the internal contact forces of particles.  ...  The authors acknowledge the following partners for their contributions: Gassco, Shell, Statoil, TOTAL, ENGIE, and the Research Council of Norway (193816/S60).  ... 
doi:10.1007/s00603-020-02139-7 fatcat:7qwtr7sbsffqfhpi3xxhnigyiy

Generation of Independent Contact Regions on objects reconstructed from noisy real-world range data

Krzysztof Charusta, Robert Krug, Todor Stoyanov, Dimitar Dimitrov, Boyko Iliev
2012 2012 IEEE International Conference on Robotics and Automation  
We propose a method for increasing the robustness of grasp synthesis on uncertain geometric models.  ...  The paradigm of Independent Contact Regions (ICRs) has been proposed as a way to increase the tolerance to grasp positioning errors.  ...  EVALUATION METHODOLOGY For convenience, henceforth meshes reconstructed from unfiltered point clouds are referred to as raw meshes, meshes reconstructed from filtered point clouds are denoted as filtered  ... 
doi:10.1109/icra.2012.6225046 dblp:conf/icra/CharustaKSDI12 fatcat:nditnrj7evepbpsvbkac2tjbcy

Crack path simulation for cylindrical contact under fretting conditions

R.A. Cardoso, J.A. Araújo, J.L.A. Ferreira, F.C. Castro
2015 Frattura ed Integrità Strutturale  
In this work different strategies to estimate crack path for cylindrical contacts under fretting conditions are carried out.  ...  The results show that, under fretting conditions, models based on the critical plane method are not effective to estimate the crack initiation orientation, while models based on a so called "critical direction  ...  In a similar way one could assume the point or the area method (for 2D problems) [6] , but these will not be assessed here due to space constraints.  ... 
doi:10.3221/igf-esis.35.46 fatcat:uo34mlzotfgsdin2tnukxfd35m

Development of a Semi‐Implicit Contact Methodology for Finite Volume Stress Solvers

A. Scolaro, C. Fiorina, I. Clifford, A. Pautz
2021 International Journal for Numerical Methods in Engineering  
The contact procedure is designed around an arbitrary mesh mapping algorithm to allow for non-conformal meshes at the contact interface between the two bodies.  ...  In this article, we present a novel semi-implicit methodology for the solution of static force-loading contact problems with cell-centered finite volume codes.  ...  The gain in performance achieved with the implicit contact methodology is difficult to assess.  ... 
doi:10.1002/nme.6857 fatcat:4c5q77uaqnfi7ja2w3x6y776hy

Efetividade das intervenções de telemedicina no impacto da artrite reumatóide: protocolo de uma revisão umbrella
Effectiveness of telemedicine interventions in the impact of rheumatoid arthritis: an umbrella review protocol

Ana Rocha, Eduardo Santos, Mauro Mota, Madalena Cunha, Maria Henriques
2020 Revista de Enfermagem Referência  
Systematic Review Method This protocol was based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) for systematic review protocols (PRISMA-P) as a reporting guideline  ...  Assessment of the methodological quality of the studies Two reviewers will assess the studies and their quality using the JBI Critical Appraisal Checklist for Systematic Reviews and Research Synthesis  ...  Methodology: Rocha, A. I., Santos, E. J., Mota, M. A., Cunha, M., Henriques, M. A. Writing -original draft preparation: Rocha, A. I., Santos, E. J., Mota, M. A. Writing -review and editing: Rocha, A.  ... 
doi:10.12707/riv19097 fatcat:2ub5f2z7ora5dnp4uluydmdsim

3D Adaptive Multi Fracture Analysis of Composites

S. Mohammadi, S. Forouzan-Sepehr
2003 Materials Science Forum  
A new approach based on the concepts of the discrete element method coupled with adaptive remeshing techniques is presented for impact resistance of composites.  ...  Anisotropic Hoffman based models are used for predicting the imminence of a material crack or interlaminar delamination.  ...  Acknowledgements The authors would like to acknowledge the support received from the "University of Tehran, Vice Chancellor for Research" under the grant number 614/2/627.  ... 
doi:10.4028/www.scientific.net/msf.440-441.145 fatcat:fl66kqfmpfb3vghappxsc63fzm

Model-based detection of local defects in gears

Jędrzej Mączak, Marcin Jasiński
2017 Archive of applied mechanics (1991)  
The paper is presenting a methodology for developing model-based method of gear fault diagnostics.  ...  The model was initially used to analyze the teeth contact in the presence of pitch errors and later to verify the sensitiveness of proposed diagnostic methods and their availability to detect the fatigue  ...  meshing force resulting from the deflections of mating tooth profiles, the knowledge of the meshing stiffness for the current mating point is required.  ... 
doi:10.1007/s00419-017-1321-2 fatcat:752tom7pk5cihagfxeu7bjmm5m

Adaptive meshing technique applied to an orthopaedic finite element contact problem

Colleen M Roarty, Nicole M Grosland
2004 The Iowa Orthopaedic Journal  
Recently a growing interest has developed, in the orthopaedic biomechanics community, in how numerical models can be constructed for the optimal solution of problems in contact mechanics.  ...  Finite element methods have been applied extensively and with much success in the analysis of orthopaedic implants.  ...  SUMMARY An adaptive FE procedure has been developed, using an error estimator based on the oscillatory behavior of a near-point contact analysis.  ... 
pmid:15296201 pmcid:PMC1888414 fatcat:7uexgm6fjjeuhmtuoisdguomym

A complete methodology for the mechanical diagnosis of statue provided by innovative uses of 3D model. Application to the imperial marble statue of Alba-la-Romaine (France)

Marine Bagnéris, Fabien Cherblanc, Philippe Bromblet, Eloi Gattet, Léonard Gügi, Nicolas Nony, Vincent Mercurio, Anthony Pamart
2017 Journal of Cultural Heritage  
The number of contact points directly depends on the number of mesh elements.  ...  The meshes generated from the point clouds have been used to virtually assemble dismounted historic buildings [8] or statues [9, 10] and to simulate their mechanical behaviour by Finite Element Method  ... 
doi:10.1016/j.culher.2017.05.002 fatcat:nw7fkvuvrfgtnbwzeufoeolcby

A new methodology to evaluate the performance of physics simulation engines in haptic virtual assembly

Germanico Gonzalez-Badillo, Hugo I. Medellin-Castillo, Theodore Lim, James M. Ritchie, Raymond C.W. Sung, Samir Garbaya
2014 Assembly Automation  
Two objects with the same shape can have different contact points defined by the object's triangular mesh, position and orientation.  ...  , where 1 is the restitution coefficient; 2 the impulse forces at the contact point can only push but not pull objects; and 3 the contact forces occur only at contact points.  ...  Corresponding author Germanico Gonzalez-Badillo can be contacted at: germanico.gonzalez@uaslp.mx  ... 
doi:10.1108/aa-05-2013-046 fatcat:4tr7blouhjhfvmzzrqr5zom44i

Long-Term Slope Stability of Abandoned Mine Lake—Numerical Modelling and Risk Assessment

Vincent Renaud, Marwan Al Heib, Roxane Muller, Jan Burda
2021 Materials Proceedings  
To develop a reliability methodology for assessing the long-term stability of flooded open pit mines, a large-scale numerical model of the lake was carried out and was applied on Lake Most, which is one  ...  The large-scale numerical model was built, based on the site observations, large scale LiDAR data and geotechnical data.  ...  The final data point cloud was used to create the digital terrain model to build the 3D volumetric mesh.  ... 
doi:10.3390/materproc2021005088 fatcat:zg4pge2rhvdzhltopfvj4pfmbq

A flank modification method for spiral bevel gears based on mismatch topography adjustment

Shaowu NIE, Jing DENG, Xiaozhong DENG, Longlong GENG
2018 Journal of Advanced Mechanical Design, Systems, and Manufacturing  
Shih and Fong (2007) studied the flank modification methodology based on ease-off topography for face-hobbing hypoid gears, on this basis Shih (2010) proposed a novel ease-off topography modification method  ...  al., (2015) studied the active tooth surface design method for double-cut cycloid bevel gears, which can modify the pinion tooth surface by predetermining the meshing performance parameters based on the  ...  would like to thank the financial aid and support from the National Natural Science Foundation of China (No.51705134, No.51705135, No.51475141, No. 51675161).We also thank anonymous reviewers and editors for  ... 
doi:10.1299/jamdsm.2018jamdsm0057 fatcat:nu7rzuxwizczdiqi4pjt2ktele

Penalty-based Numerical Representation of Rigid Body Interactions with Applications to Simulation of Robotic Grasping [article]

Michael Zechmair, Yannick Morel
2021 arXiv   pre-print
Such situations lying beyond the range of admissible configurations for constraint-based methods, their occurrence typically results in non-meaningful simulation outcomes.  ...  However, application of constraint-based methods in a numerical setting may lead to problematic configurations in which, for instance, volumes occupied by distinct bodies may overlap.  ...  A simple, computationally inexpensive method is provided to assess the overlap between objects.  ... 
arXiv:2108.00348v1 fatcat:lqilsm4k2vbsxati3cs72wmem4
« Previous Showing results 1 — 15 out of 57,552 results