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A Classification of Topological Discrepancies in Additive Manufacturing [article]

Morad Behandish, Amir M. Mirzendehdel, Saigopal Nelaturi
2019 arXiv   pre-print
We first present a generic method to characterize local topological discrepancies due to material under- and over-deposition in AM, and show how it captures various types of defects in the as-manufactured  ...  Additive manufacturing (AM) enables enormous freedom for design of complex structures.  ...  The views, opinions and/or findings expressed are those of the authors and should not be interpreted as representing the official views or policies of the Department of Defense or U.S. Government.  ... 
arXiv:1904.13210v2 fatcat:6fc7vacsw5ejbkg6xxqjxgpfbi

TopTemp: Parsing Precipitate Structure from Temper Topology [article]

Lara Kassab, Scott Howland, Henry Kvinge, Keerti Sahithi Kappagantula, Tegan Emerson
2022 arXiv   pre-print
We show that this topological representation is able to support temper classification of microstructures in a data limited setting, generalizes well to previously unseen samples, is robust to image perturbations  ...  In this work, we present a topological representation of temper (heat-treatment) dependent material micro-structure, as captured by scanning electron microscopy, called TopTemp.  ...  discrepancy in model performance.  ... 
arXiv:2204.00629v2 fatcat:r27e2uwms5g5rdvssmirp4qvhy

A method for collaborative knowledge acquisition and modeling enabling the development of a knowledge-based configurator of robot-based automation solutions

Eike Schäffer, Simon Fröhlig, Andreas Mayr, Jörg Franke
2019 Procedia CIRP  
In addition, an auxiliary tool to support single steps of the method is introduced.  ...  In addition, an auxiliary tool to support single steps of the method is introduced.  ...  Acknowledgements This paper emerged from the government-funded project ROBOTOP within the German technology program "Development of digital technologies" (PAiCE) of the Federal Ministry for Economic Affairs  ... 
doi:10.1016/j.procir.2020.01.018 fatcat:x6x2dr7fnfdprij3ow25bkfkf4

Computer-Aided Requirement Management for Product Definition: A Methodology and Implementation

Mitchell M. Tseng, Jianxin Jiao
1998 Concurrent Engineering - Research and Applications  
In addition, in the practice of concurrent engineering, product development teams must keep track of a myriad of requirements derived from different perspectives on the product life-cycle, including manufacturing  ...  Product definition has been recognized as one of the deciding factors in designing a product for success in the marketplace.  ...  Design variations are measured for existing designs in terms of the discrepancies of their FRs to those of a selected reference model.  ... 
doi:10.1177/1063293x9800600205 fatcat:xmob7g3plfe5znmapqu7qjy7xu

Technique of increasing the accuracy of GTE parts manufactured by selective laser melting

I S Stepanenko, V A Pechenin, N V Ruzanov, A I Khaimovich
2018 Journal of Physics, Conference Series  
Based on the results of the approbation, control and analysis of the batch parts obtained by SLM, an additional algorithm for compensating for discrepancies that exist due to instability of the process  ...  At the present time, additive technologies are becoming increasingly widespread, through which it is possible to obtain complex shape parts in a short time with minimal post-processing.  ...  Acknowledgements The work was supported by the Ministry of Education and Science of the Russian Federation in the framework of the program to improve the competitiveness of the University of Samara among  ... 
doi:10.1088/1742-6596/1096/1/012143 fatcat:7u474wps35gmtakq2sre4lwzsq

Topology Optimisation in Structural Steel Design for Additive Manufacturing

Tiago P. Ribeiro, Luís F. A. Bernardo, Jorge M. A. Andrade
2021 Applied Sciences  
In contrast, the Optimisation of Continua recently emerged as a critical asset for fostering the employment of Additive Manufacturing, as one can observe in several other industrial fields.  ...  The discussion focused on Topology Optimisation recent approaches, methods, and fields of application and deepened the analysis of structural steel design and design for Additive Manufacturing.  ...  Some recent examples of topologically optimised and additively manufactured joints can be found in Figure 11 .  ... 
doi:10.3390/app11052112 fatcat:eqnmnnuyuvb5jbrhb4t4tk2rge

A model for co-evolution in manufacturing based on biological analogy

Tarek AlGeddawy, Hoda ElMaraghy
2011 International Journal of Production Research  
an example of a pair of classification trees of manufacturing systems and their corresponding products.  ...  Both obtained cladograms are equal in having a length of 6 steps (features) and are identical in graph topology.  ...  VITA AUCTORIS Tarek AlGeddawy was born in Giza, Egypt in 1977  ... 
doi:10.1080/00207543.2010.497780 fatcat:2kt7unsr2ff7bjpo5x5jszgrg4

Production ready feature recognition based automatic group technology part coding

Arlo L. Ames
1991 Proceedings of the first ACM symposium on Solid modeling foundations and CAD/CAM applications - SMA '91  
IDIS'IRIB_ITIO["I OF THIS DOCUMENT IS UNLIMI _:'  ...  _c) are standard,and could be manufactu_red from standard stock with standard tools.Further development willcenter around adding additional classification of features(e.g. countersinks, counterboresand  ...  GROU ,r_TECHNOLOGY Group technology is a means of saving time and money in design and manufacture by grouping similar parts together to take advantage of their similarities.  ... 
doi:10.1145/112515.112540 dblp:conf/sma/Ames91 fatcat:poma7kkx3nffhemz6nfpfxrfjm

Additive Manufacturing in Customized Medical Device [chapter]

Ching Hang Bob Yung, Lung Fung Tse, Wing Fung Edmond Yau, Sze Yi Mak
2021 Advanced Additive Manufacturing [Working Title]  
The long-established application of rapid prototyping in additive manufacturing (AM) has inspired a revolution in the medical industry into a new era, in which the clinical-driven development of the customized  ...  This method has demonstrated outstanding advantages over the traditional manufacturing approach in terms of form, function, precision, and clinical flexibility.  ...  Acknowledgements SYM acknowledges funding support from sponsored research RS 200263 at the University of Hong Kong.  ... 
doi:10.5772/intechopen.101139 fatcat:3tanulug4jej3b7gucnj7ijoui

Detecting and Localizing Dents on Vehicle Bodies Using Region-Based Convolutional Neural Network

Sung Hyun Park, Amir Tjolleng, Joonho Chang, Myeongsup Cha, Jongcheol Park, Kihyo Jung
2020 Applied Sciences  
The proposed R-CNN could be applied to detect and localize surface dents during the manufacture of vehicle bodies in the automobile industry.  ...  Detection and localization of the dents on a vehicle body that occurs during manufacturing is critical to achieve the appearance quality of a new vehicle.  ...  In addition, the R-CNN localized the estimated location of a dent using the heat-map.  ... 
doi:10.3390/app10041250 fatcat:v754jrb4v5aixchvzf3xzscwtq

Parametric Modeling of Components for Selection and Specification of Hybrid Vehicle Drivetrains

Theo Hofman, Maarten Steinbuch, Roëll van Druten, Alex Serrarens
2007 World Electric Vehicle Journal  
Drivetrain hybridization implies adding a secondary power source (electric machine/battery) to a primary power source (engine/filled fuel tank) in order to improve: fuel economy, emissions, drivability  ...  This paper seeks to investigate the possibility of overall model simplification for the hybrid drivetrain system including the control strategy.  ...  In addition, a novel "Rule-Based Energy Management Strategy" (RB EMS) is used with which the fuel economy and control Fig. 1 Classification overview of different hybrid drivetrains and modeling approach  ... 
doi:10.3390/wevj1010215 fatcat:pvsgyvnubre4pixkomj2ni5zli

CAD/CAM System for Additive Manufacturing with a Robust and Efficient Topology Optimization Algorithm Based on the Function Representation

Dmitry Popov, Yulia Kuzminova, Evgenii Maltsev, Stanislav Evlashin, Alexander Safonov, Iskander Akhatov, Alexander Pasko
2021 Applied Sciences  
The proposed approach significantly helps in designing additive manufacturing process and saves time for its users.  ...  The developed CAD/CAM system consists of 3D modeling, simulation, topology optimization, and direct manufacturing modules.  ...  However, topology optimization algorithms can produce geometries that are impossible with traditional production methods but suitable for additive manufacturing (AM) [2] .  ... 
doi:10.3390/app11167409 fatcat:qrdktt7tqzdztgvv3pgyn5dsje

Cellular Metals Manufacturing

H.N.G. Wadley
2002 Advanced Engineering Materials  
applications. [4] Manufacturing methods based upon the foaming of a liquid metal, either by injecting a gas (the CYMAT process) [5] or by the decomposition of gas releasing particles (e.g. the Alporus  ...  Manufacturing Methods Overview As the engineering applications of cellular metals grows, many methods for their manufacture are being developed. [1] They result in materials that can be classified by the  ...  These manufacturing routes are organized in Figure 2 and the names of the products associated with each are shown. Note the classification for Alulight as a solid route is problematic.  ... 
doi:10.1002/1527-2648(20021014)4:10<726::aid-adem726>;2-y fatcat:c25pjsh2e5enva3uexy4h2izri

Circuit implementation of a four-dimensional topological insulator

You Wang, Hannah M. Price, Baile Zhang, Y. D. Chong
2020 Nature Communications  
The classification of topological insulators predicts the existence of high-dimensional topological phases that cannot occur in real materials, as these are limited to three or fewer spatial dimensions  ...  Class AI is topologically trivial in one to three spatial dimensions, so 4D is the lowest possible dimension for achieving a topological insulator in this class.  ...  In the symmetry-based classification of topological phases 3-7 , Class AI includes time-reversal (T) symmetric, spinless systems that are not protected by any special spatial symmetries.  ... 
doi:10.1038/s41467-020-15940-3 pmid:32398727 fatcat:igycdhab5ra5bj2okqobemmcg4

Recent Advances on the Design Automation for Performance-Optimized Fiber Reinforced Polymer Composite Components

Yi Di Boon, Sunil Chandrakant Joshi, Somen Kumar Bhudolia, Goram Gohel
2020 Journal of Composites Science  
Advanced manufacturing techniques, such as automated fiber placement and additive manufacturing enables the fabrication of fiber-reinforced polymer composite components with customized material and structural  ...  They include studies on microstructure-based material design, applications of machine learning models in stress analysis, and topology optimization of fiber-reinforced polymer composites.  ...  Funding: This research did not receive any specific grant from funding agencies in the public, commercial or not-for-profit sectors.  ... 
doi:10.3390/jcs4020061 fatcat:5x2767kdmbayxoapyffzq6eqry
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