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Relevant bibliographies by topics / Contact engineering

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Academic literature on the topic 'Contact engineering'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 September 2023

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Journal articles on the topic "Contact engineering"

1

Banerjee, Sneha, and Peng Zhang. "Review of recent studies on nanoscale electrical junctions and contacts: Quantum tunneling, current crowding, and interface engineering." Journal of Vacuum Science & Technology A 40, no. 3 (May 2022): 030802. http://dx.doi.org/10.1116/6.0001724.

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The study of charge carrier transport at nanoscale electrical contacts is crucial for the development of next-generation electronics. This paper reviews recent modeling efforts on quantum tunneling, current crowding, and contact resistance across electrical interfaces with nanometer scale dimensions. A generalized self-consistent model for quantum tunneling induced electron transport in metal–insulator–metal (MIM) junctions is summarized. Rectification of a dissimilar MIM junction is reviewed. A modified two-dimensional (2D) transmission line model is used to investigate the effects of spatially varying specific contact resistivity along the contact length. The model is applied to various types of electrical contacts, including ohmic contacts, MIM junction based tunneling contacts, and 2D-material-based Schottky contacts. Roughness engineering is recently proposed to offer a possible paradigm for reducing the contact resistance of 2D-material-based electrical contacts. Contact interface engineering, which can mitigate current crowding near electrical contacts by spatially designing the interface layer thickness or properties, without requiring an additional material or component, is briefly reviewed. Tunneling engineering is suggested to eliminate severe current crowding in highly conductive ohmic contacts by introducing a thin tunneling layer or gap between the contact members. Unsolved problems and challenges are also discussed.

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Shi, Xi, and Andreas A. Polycarpou. "Measurement and Modeling of Normal Contact Stiffness and Contact Damping at the Meso Scale." Journal of Vibration and Acoustics 127, no. 1 (February 1, 2005): 52–60. http://dx.doi.org/10.1115/1.1857920.

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Modeling of contact interfaces that inherently include roughness such as joints, clamping devices, and robotic contacts, is very important in many engineering applications. Accurate modeling of such devices requires knowledge of contact parameters such as contact stiffness and contact damping, which are not readily available. In this paper, an experimental method based on contact resonance is developed to extract the contact parameters of realistic rough surfaces under lightly loaded conditions. Both Hertzian spherical contacts and flat rough surfaces in contact under normal loads of up to 1000 mN were studied. Due to roughness, measured contact stiffness values are significantly lower than theoretical values predicted from smooth surfaces in contact. Also, the measured values favorably compare with theoretical values based on both Hertzian and rough contact surfaces. Contact damping ratio values were found to decrease with increasing contact load for both Hertzian and flat surfaces. Furthermore, Hertzian contacts have larger damping compared to rough flat surfaces, which also agrees with the literature. The presence of minute amount of lubricant and wear debris at the interface was also investigated. It was found that both lubricant and wear debris decrease the contact stiffness significantly though only the lubricant significantly increases the damping.

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Asada, S., Koji Hashimoto, Yutaka S. Sato, Kenji Fukuda, and M. Ueki. "Rolling Contact Fatigue of Engineering Ceramics." Solid State Phenomena 25-26 (January 1992): 627–34. http://dx.doi.org/10.4028/www.scientific.net/ssp.25-26.627.

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Helm, Francesca, and Tejane Dabre. "Engineering a ‘contact zone’ through translanguaging." Language and Intercultural Communication 18, no. 1 (November 20, 2017): 144–56. http://dx.doi.org/10.1080/14708477.2017.1400509.

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Zhang, Peng, Yiwei Zhang, Yi Wei, Huaning Jiang, Xingguo Wang, and Yongji Gong. "Contact engineering for two-dimensional semiconductors." Journal of Semiconductors 41, no. 7 (July 2020): 071901. http://dx.doi.org/10.1088/1674-4926/41/7/071901.

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Hussain, Muhammad, Hossain Fahad, and Ramy Qaisi. "Contact engineering for nano-scale CMOS." physica status solidi (a) 209, no. 10 (September 10, 2012): 1954–59. http://dx.doi.org/10.1002/pssa.201200343.

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Passi, Vikram, Amit Gahoi, Enrique G. Marin, Teresa Cusati, Alessandro Fortunelli, Giuseppe Iannaccone, Gianluca Fiori, and Max C. Lemme. "Ultralow Specific Contact Resistivity in Metal–Graphene Junctions via Contact Engineering." Advanced Materials Interfaces 6, no. 1 (November 26, 2018): 1801285. http://dx.doi.org/10.1002/admi.201801285.

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Hu, Jianqiao, Fuhai Gao, Xiaoming Liu, and Yueguang Wei. "An elasto-plastic contact model for conformal contacts between cylinders." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 234, no. 12 (December 22, 2019): 1837–45. http://dx.doi.org/10.1177/1350650119896461.

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In this paper, we present a new model for the elasto-plastic conformal contact between cylinders. By using finite element simulation, it is observed that the transition of elasto-plastic contact in conformal case is different from the transition in Hertz contact. The plastic contact of conformal case can be physically represented by the plastic-Winkler model. The new model provides an explicit solution for the normal force–displacement relation of elasto-plastic conformal contact. Compared to other elastic contact models of conformal contact, the advantages of our model are: (1) it can be used for high load contact and (2) plasticity is taken into account by using the plastic-Winkler model. Our model, therefore, is capable of dealing with realistic engineering problem with high load and plasticity.

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Amini Sarabi, Mohammad, and Parisa Hosseini Tehrani. "A New Combined Model for considering the Plasticity Effects in Contacting Asperities." Mathematical Problems in Engineering 2020 (November 18, 2020): 1–12. http://dx.doi.org/10.1155/2020/4640204.

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Wheel-rail contact in railway engineering is an important topic. Due to different materials and surface roughness of wheel and rail, the contact characteristics can alter significantly. This article aims to investigate the effects of surface roughness and asperities on the contact parameters such as contact area, contact force, and contact stiffness. The lateral contacts between asperities are assumed to be the general contact condition. Azimuthal and contact angles distributions are assumed to be spherical harmonic distribution. This assumption is compatible with the asperity distribution on the wheel and the rail surfaces. Besides, a new combined model is developed to cover the stick-slip and the plasticity effects in contacting asperities. The results of the presented model offer very good estimations for the asperities contact characteristics, especially at the small-contact area and separation where high-contact pressure and plastic deformation usually exist.

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Richstein, Benjamin, Lena Hellmich, and Joachim Knoch. "Silicon Nitride Interface Engineering for Fermi Level Depinning and Realization of Dopant-Free MOSFETs." Micro 1, no. 2 (November 21, 2021): 228–41. http://dx.doi.org/10.3390/micro1020017.

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Problems with doping in nanoscale devices or low temperature applications are widely known. Our approach to replace the degenerate doping in source/drain (S/D)-contacts is silicon nitride interface engineering. We measured Schottky diodes and MOSFETs with very thin silicon nitride layers in between silicon and metal. Al/SiN/p-Si diodes show Fermi level depinning with increasing SiN thickness. The diode fabricated with rapid thermal nitridation at 900 ∘C reaches the theoretical value of the Schottky barrier to the conduction band ΦSB,n=0.2 eV. As a result, the contact resistivity decreases and the ambipolar behavior can be suppressed. Schottky barrier MOSFETs with depinned S/D-contacts consisting of a thin silicon nitride layer and contact metals with different work functions are fabricated to demonstrate unipolar behavior. We presented n-type behavior with Al and p-type behavior with Co on samples which only distinguish by the contact metal. Thus, the thermally grown SiN layers are a useful method suppress Fermi level pinning and enable reconfigurable contacts by choosing an appropriate metal.

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Dissertations / Theses on the topic "Contact engineering"

1

Li, Sheng. "Lubrication And Contact Fatigue Models For Roller And Gear Contacts." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1234822355.

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Alshahrany, Shaya. "Rolling contact fatigue in heavily loaded gear transmission contacts." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/90422/.

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This thesis examines the influence of asperities such as found on the teeth of gears and discs, and failure mechanisms associated with rough surface Elastohydrodynamic Lubrication (EHL). The principal outcomes of the research provide a good insight into fatigue life, residual stress effects, damage prediction and surface contact failures. In particular, the study is intended to provide understanding into the residual stress distribution resulting from plastic deformation of surface asperities in the running in process. The residual stress is then added to the asperity elastic stress distribution and examined in detail to see the effects on fatigue damage and fatigue life. So, a theoretical model has been developed to assist design against the residual stress effect and surface contact fatigue, such as micropitting. The technique used in the study starts with developing an elastic plastic model of the rough surface by using the Abaqus Finite Element analysis software package. This is a nonlinear problem and ranges of applied loads have been applied to the as-manufactured surfaces causing the asperity features to experience varying degrees of plastic deformation. The pre and post running roughness profiles are studied in order to assess the level of plastic deformation actually occurring at significant surface asperity features by aligning the pre and post running profiles. This results in a new technique that has helped to identify the level of plastic deformation occurring in the practice, and also to make a comparison with FEA contact analysis for the same asperity features to identify the appropriate residual stress field. The residual stress field associated with the plastic deformation was extracted and evaluated. The extracted residual stress field was transferred to a form that facilitated IV inclusion in stress evaluation code to obtain the stress history for the material subject to loading in an EHL contact. The research carried out considers surface fatigue analysis with and without a residual stress field, so as to establish the influence of asperity plastic deformation on the fatigue properties of the surface. All the work is based on numerical simulation of surface fatigue failure in EHL situations and carried out numerically. The procedure can be applied quickly and gives the opportunity to apply several models and investigate the influence of all the model parameters on material deformation and fatigue life.

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Webster, Martin Nicholas. "Measurement and contact analysis of engineering surfaces." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/38184.

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Rodriguez, Garcia Alberto. "Shape For Contact." Thesis, Carnegie Mellon University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3575524.

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Given a desired function for an effector, what is its appropriate shape? This thesis addresses the problem of designing the shape of a rigid end effector to perform a given manipulation task. It presents three main contributions: First, it describes the contact kinematics of an effector as the product of both its shape and its motion, and assumes a fixed motion model to explore the role of shape in satisfying a certain manipulation task. Second, it formulates that manipulation task as a set of constraints on the geometry of contact between the effector and the world. Third, it develops tools to transform those contact constraints into an effector shape for general 1-DOF planar mechanisms and general 1-DOF spatial mechanisms, and discusses the generalization to mechanisms with more than one degree of freedom.

We describe the case studies of designing grippers with invariant grasp geometry, grippers with improved grasp stability, and grippers with extended grasp versatility. We further showcase the techniques with the design of the fingers of the MLab hand, a three-fingered gripper actuated with a single motor, capable of exerting any combination of geometrically correct enveloping or fingertip grasps of spherical, cylindrical, and prismatic objects of varying size.

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McGonnell, John. "Contact Point Detection and Contact History Tracking in Biomimetic Whiskers." University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1306960264.

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Eberman, Brian Scott. "Contact Sensing: A Sequential Decision Approach to Sensing Manipulation Contact." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/7061.

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This paper describes a new statistical, model-based approach to building a contact state observer. The observer uses measurements of the contact force and position, and prior information about the task encoded in a graph, to determine the current location of the robot in the task configuration space. Each node represents what the measurements will look like in a small region of configuration space by storing a predictive, statistical, measurement model. This approach assumes that the measurements are statistically block independent conditioned on knowledge of the model, which is a fairly good model of the actual process. Arcs in the graph represent possible transitions between models. Beam Viterbi search is used to match measurement history against possible paths through the model graph in order to estimate the most likely path for the robot. The resulting approach provides a new decision process that can be use as an observer for event driven manipulation programming. The decision procedure is significantly more robust than simple threshold decisions because the measurement history is used to make decisions. The approach can be used to enhance the capabilities of autonomous assembly machines and in quality control applications.

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Schmidt, Aaron Jerome 1979. "Contact thermal lithography." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/27116.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.
Includes bibliographical references (p. 65-67).
Contact thermal lithography is a method for fabricating microscale patterns using heat transfer. In contrast to photolithography, where the minimum achievable feature size is proportional to the wavelength of light used in the exposure process, thermal lithography is limited by a thermal diffusion length scale and the geometry of the situation. In this thesis the basic principles of thermal lithography are presented. A traditional chrome-glass photomask is brought into contact with a wafer coated with a thermally sensitive polymer. The mask-wafer combination is flashed briefly with high intensity light, causing the chrome features heat up and conduct heat locally to the polymer, transferring a pattern. Analytic and finite element models are presented to analyze the heating process and select appropriate geometries and heating times. In addition, an experimental version of a contact thermal lithography system has been constructed and tested. Early results from this system are presented, along with plans for future development.
by Aaron Jerome Schmidt.
S.M.

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Rasheed, Rawand Muzafar. "Non-Contact Distillation." PDXScholar, 2019. https://pdxscholar.library.pdx.edu/open_access_etds/5275.

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Leidenfrost phenomenon has been studied extensively for its role in applications ranging from nuclear reactor cooling, to metals manufacturing, combustion, and other fields. Herein, Leidenfrost phenomenon is pursued towards non-contact distillation processes with hopes of reducing or even eliminating contaminant fouling. In particular, the microgravity environment of a drop tower is exploited to demonstrate the facility with which droplets achieve and sustain the Leidenfrost state. Dynamic Leidenfrost impacts in microgravity are presented for impacts on hydrophilic and superhydrophobic planar substrates, macro-pillar arrays, confined passageways, and others. Nearly ideal elastic non-contact impacts and droplet oscillation modes are observed. Dynamic Leidenfrost impacts in microgravity for uniquely low velocity impacts are investigated analytically and experimentally. We find Leidenfrost vapor layer thicknesses on the order of millimeters for a 1 mL droplet of water with impact velocity 1 mm/s - a 100-fold increase relative to terrestrial vapor layers. Such results are supported by preliminary experimental observations. Further droplet distillation experiments are conducted in a terrestrial gravity environment using a heated tilted rotating hemi-circular track. Droplet evaporation rates and lifetimes are tabulated for the sliding/rolling drops at varying angular velocities and tilt angles. An analytical model for the evaporation rate of a rolling Leidenfrost droplet is developed and compared to the experimental results with good agreement. The empirical and analytical results serve as key design tools for sizing a prototypical non-contact distillation system for terrestrial desalinization or spacecraft water recycling.

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Qi, Hongsheng. "A contact length model for grinding wheel-workpiece contact." Thesis, Liverpool John Moores University, 1995. http://researchonline.ljmu.ac.uk/5134/.

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Chung, Raymond Y. M. "Non-contact surface inspection." Thesis, Liverpool John Moores University, 1992. http://researchonline.ljmu.ac.uk/4944/.

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This thesis describes the development of a non-contact inspection system, used in providing a comparative method for gauging a surface. The purpose of this system is not to measure the 3-D shape of a part. The volume difference between the part to be inspected and a master, is merely part of the decision criteria, where if this difference exceeds a certain threshold value, then the component under inspection is deemed to have failed. The technique involves a combination of fringe projection and image subtraction. The system comprises two sub-systems, a low-cost pc based image processor and a white light, square wave fringe projector. A camera provides the interface between the two sub-systems. Validation of the technique is provided by the simulation of mathematically generated defects, and by means of experiments on samples of known volume. In addition, the effect of the variation of particular set-up constants, on the technique's accuracy are also illustrated. The problems and subsequent solutions associated with the practical inspection, result in an improved method of gauging. The system provides reliable results (within 4%) for surfaces of nominally similar form and reflectivity. Additional results (within 10%) are illustrated, where the images and fringe patterns are mis-aligned. As a result of a selective filtering scheme, precise relocation of the surfaces (used in the comparison) is unnecessary. This is conditional upon the fringes on each surface, being identical in orientation with each other. Further consideration of the technique (within an error analysis) indicates the necessity of an accurate determination of all the set-up constants. The error results cannot be taken too literally, since the worst case values are presented. However, the trends of the effects of these errors are useful. An adapted alternative method is also described that may prove to be (in certain applications) an interesting real-time solution.

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Books on the topic "Contact engineering"

1

Atluri, Satya N., and A. P. S. Selvadurai. Contact mechanics in the engineering sciences. Duluth, GA: Tech Science Press, 2010.

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Frank, Kreith, and Boehm R. F, eds. Direct-contact heat transfer. Washington: Hemisphere Pub. Corp., 1988.

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Veljko, Potkonjak, and Matijevic Vladimir, eds. Dynamics of Robots with Contact Tasks. Dordrecht: Springer Netherlands, 2003.

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Computational contact mechanics. 2nd ed. Berlin, Germany: Springer, 2005.

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International Conference on Contact Mechanics (3rd 1997 Madrid, Spain). Contact mechanics III. Edited by Aliabadi M. H and Samartin A. Southampton: Computational Mechanics Publications, 1997.

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P, Wriggers, and Laursen Tod A, eds. Computational contact mechanics. Wien: Springer, 2007.

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International Conference on Contact Mechanics 93 (1st 1993 Southampton, England). Contact mechanics: Computational techniques. Edited by Aliabadi M. H, Brebbia C. A, and Wessex Institute of Technology. Southampton, UK: Computational Mechanics Publications, 1993.

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Peter, Wriggers, and SpringerLink (Online service), eds. Trends in Computational Contact Mechanics. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011.

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9

Tripp, John H. Hertzian contact in two and three dimensions. [Washington, DC]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985.

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Tripp, John H. Hertzian contact in two and three dimensions. [Washington, DC]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985.

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Book chapters on the topic "Contact engineering"

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Kim, Tae Wan, Sang Don Lee, and Yong Joo Cho. "Contact Fatigue Life Prediction under EHL Contact." In Key Engineering Materials, 22–27. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-978-4.22.

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Ramakrishnan, C. V. "Elastic Contact Problems." In Lecture Notes in Engineering, 525–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-83535-3_21.

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Karami, Ghodratollah. "The Contact Problem." In Lecture Notes in Engineering, 8–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-83897-2_2.

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Takahashi, Susumu. "Axisymmetric Contact Analysis." In Lecture Notes in Engineering, 146–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84502-4_5.

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Straffelini, Giovanni. "Surfaces in Contact." In Springer Tracts in Mechanical Engineering, 1–20. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-05894-8_1.

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Yoon, Jeong-Yeol. "Contact Guidance and Cell Patterning." In Tissue Engineering, 137–54. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-83696-2_8.

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Karami, Ghodratollah. "Non-Hertzian Contact Problems." In Lecture Notes in Engineering, 145–203. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-83897-2_6.

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Takahashi, Susumu. "Overview of Contact Analysis." In Lecture Notes in Engineering, 6–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84502-4_2.

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Takahashi, Susumu. "Two-Dimensional Contact Analysis." In Lecture Notes in Engineering, 61–145. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84502-4_4.

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"Contact Interface Engineering." In Organic Thin Film Transistor Integration, 185–207. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527634446.ch6.

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Conference papers on the topic "Contact engineering"

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Berezin, A. A. "Isotopic engineering in surface science and technology." In CONTACT AND SURFACE 2011. Southampton, UK: WIT Press, 2011. http://dx.doi.org/10.2495/secm110171.

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Lam, Michael, and Andrew R. Neureuther. "Polarization contact: mask engineering." In Photomask Technology 2002, edited by Brian J. Grenon and Kurt R. Kimmel. SPIE, 2002. http://dx.doi.org/10.1117/12.467897.

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Farheen, Tasnuva, Ulbert Botero, Nitin Varshney, Damon L. Woodard, Mark Tehranipoor, Domenic Forte, and Haoting Shen. "Proof of Reverse Engineering Barrier: SEM Image Analysis on Covert Gates." In ISTFA 2021. ASM International, 2021. http://dx.doi.org/10.31399/asm.cp.istfa2021p0179.

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Abstract IC camouflaging has been proposed as a promising countermeasure against reverse engineering. Camouflaged gates contain multiple functional device structures, but appear as a single layout under microscope imaging, thereby concealing circuit functionality. The recent covert gate camouflaging design comes with a significantly reduced overhead cost, allowing numerous camouflaged gates in circuits which improves resiliency against invasive and semi-invasive attacks. Dummy inputs are used in the design, but SEM imaging analysis has only been performed on simplified contact structures so far. In this study, we fabricated real and dummy contacts in different structures and performed a systematic SEM analysis to investigate contact charging and passive voltage contrast. Machine learning based pattern recognition was also employed to examine the possibility of differentiating real and dummy contacts. Based on our experimental results, we found that the difference between real and dummy contacts is insignificant, which effectively prevents SEM-based reverse engineering.

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Sugiyama, Hiroyuki, and Yoshihiro Suda. "Hybrid Contact Search Algorithm for Wheel/Rail Contact Problems." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68588.

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In this investigation, the on-line and off-line hybrid contact algorithm for modeling wheel/rail contact problems is developed based on the elastic contact formulation. In the tabular contact search used in existing specialized railroad vehicle dynamics codes, contact points are predicted using an assumption of rigid contacts. For this reason, the contact points can be different from those predicted by the on-line based contact search used in general elastic contact formulations. The difference in the contact point becomes significant when flange contacts that have large contact angles are considered. In the hybrid algorithm developed in this investigation, the off-line tabular search is used for treating tread contacts, while the on-line iterative search is used for treating flange contacts. By so doing, a computationally efficient procedure is achieved while keeping accurate predictions of contact points on the wheel flange. Furthermore, the use of the proposed hybrid algorithm can eliminate the use of time-consuming on-line search procedures for the second points of contact as well. Since the location of second points of contact is pre-computed in the contact geometry analysis, the occurrence of two-point contact can be predicted using the look-up table in a straightforward manner. For the two-point contact scenarios encountered in curve negotiations, the online search is used for flange contacts, while the off-line search is used for tread contacts simultaneously. The on-line one-point contact search is also important for flange climb scenarios. It is demonstrated by several numerical examples that the proposed hybrid contact search algorithm can be effectively used for modeling wheel/rail contacts in the analysis of general multibody railroad vehicle systems.

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Ryzhenkov, A. V., S. I. Pogorelov, A. V. Kurshakov, M. A. Morozov, and N. V. Ryzhenkova. "Prospects for the application of film-forming amines in power engineering." In CONTACT AND SURFACE 2015. Southampton, UK: WIT Press, 2015. http://dx.doi.org/10.2495/secm150121.

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Abe, Yusuke, Anshul Vyas, Richard Senegor, Patrick Wilhite, and Cary Y. Yang. "Contact engineering for nanocarbon interconnects." In 2015 IEEE 15th International Conference on Nanotechnology (IEEE-NANO). IEEE, 2015. http://dx.doi.org/10.1109/nano.2015.7388840.

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Behrens, Volker, Edgar Siegle, Jonas Schreiber, Thomas Honig, and Michael Finkbeiner. "Effect of Ambient Temperature and Contact Force on Contact Resistance and Overtemperature Behaviour for Power Engineering Contacts." In 2012 IEEE 58th Holm Conference on Electrical Contacts (Holm 2012). IEEE, 2012. http://dx.doi.org/10.1109/holm.2012.6336603.

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Camuz, Soner, Magnus Bengtsson, Rikard Söderberg, and Kristina Wärmefjord. "Contact Variation Optimization for Surface-to-Surface Contacts." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-70877.

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Locating schemes, used to position parts during manufacturing, are usually designed in such a way that the response from the system is minimized. This implies that the position of the fasteners and/or welds are known in an assembly. Today there exist numerous of methods aiming to find an optimal set of locating points to increase the stability of an assembly, for both rigid and compliant parts. However, various industrial applications use surface-to-surface contacts to constrain certain degrees of freedom. This can lead to designs sensitive to geometric and load variations. As the complexity of the surfaces increases, difficulties of allocating geometric tolerances arise. An approach to control this is to keep the contact locations statistically stable. In this paper a methodology is presented where the First-Order Reliability Method (FORM) is applied for numerical data, retrieved through Finite Element Analysis (FEA), to ensure that statistically stable contact location are achieved for two bodies with surface-to-suface contact. The FEA data represents how much of the total stress that lies within a given area, σΩ. The data is continuous and therefore it is assumed that the gradient can be calculated numerically with small steps. The objective function is to maximize σΩ for n variables. The data set is simulated through Finite Element Analysis using the commercial software Ansys and the results is illustrated on a case study from the machining industry.

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Li Junfeng, Zheng Xinfang, Su Xiuping, Yang Yijun, Li Shengli, and Qiao Yu. "AC contactor dynamic characteristics testing system with contacts contact pressure dynamic test function." In 2013 International Conference on Mechatronic Sciences, Electric Engineering and Computer (MEC). IEEE, 2013. http://dx.doi.org/10.1109/mec.2013.6885114.

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Barry, P., and M. Koehler. "Multiparty engineering is a contact sport." In 2013 7th Annual IEEE Systems Conference (SysCon). IEEE, 2013. http://dx.doi.org/10.1109/syscon.2013.6549935.

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Reports on the topic "Contact engineering"

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Hubbell, J. M. Elevation of surficial sediment/basalt contact in the Subsurface Disposal Area, Idaho National Engineering Laboratory. Office of Scientific and Technical Information (OSTI), May 1993. http://dx.doi.org/10.2172/10178141.

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Robb, Kevin, Seth Baird, Jordan Massengale, Nathaniel Hoyt, Jicheng Guo, and Colin Moore. Engineering-Scale Batch Purification of Ternary MgCl2-KCl-NaCl Salt Using Thermal and Magnesium Contact Treatment. Office of Scientific and Technical Information (OSTI), August 2022. http://dx.doi.org/10.2172/1885295.

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Taylor, Karen, Emily Moynihan, and Information Technology Laboratory (U S. ). Information Science and Knowledge Management Branch. The Forefront : A Review of ERDC Publications, Spring 2021. Engineer Research and Development Center (U.S.), June 2020. http://dx.doi.org/10.21079/11681/40902.

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The Engineer Research and Development Center (ERDC) is the premier civil works engineering and environmental sciences research and development arm of the U.S. Army Corps of Engineers (USACE). As such, it partners with the Army, Department of Defense (DoD), federal agencies, and civilian organizations to help solve our Nation’s most challenging problems in civil and military engineering, geospatial sciences, water resources, and environmental sciences. A special government knowledge center, ERDC Information Technology Laboratory’s Information Science and Knowledge Management (ISKM) Branch is critical to ERDC’s mission, fulfilling research requirements by offering a variety of editing and library services to advance the creation, dissemination, and curation of ERDC and USACE research knowledge. Serving as the publishing authority for the ERDC, ISKM publishes all ERDC technical publications to the Digital Repository Knowledge Core, sends a copy to the Defense Technical Information Center (DTIC) and creates a press release about each publication on the ERDC website. The Forefront seeks to provide an additional mechanism for highlighting some of our technical publications to the ERDC, USACE, Army, and DoD communities. This publication also encourages those outside ERDC to contact us about using ERDC editing services. For more information regarding the reports highlighted in this publications or others that ERDC researchers’ have created, please contact the ISKM virtual reference desk at erdclibrary@ask-a-librarian.info or visit the ISKM’s online repository, Knowledge Core, at https://erdc-library.erdc.dren.mil/ .

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Mandelbaum, Jay, Ina R. Merson, Danny L. Reed, James R. Vickers, and Lance M. Roark. Value Engineering and Service Contracts. Fort Belvoir, VA: Defense Technical Information Center, June 2009. http://dx.doi.org/10.21236/ada503311.

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Kimble, Ashley, Derek Muensterman, Liliana Cahuas, Ivan Titaley, Jennifer Field, Anthony Bednar, and Lee Moores. Extraction and analysis of per- and polyfluoroalkyl Substances (PFAS) from Meals Ready-to-Eat (MRE) films using GC-MS and LC-MS/MS. Engineer Research and Development Center (U.S.), May 2023. http://dx.doi.org/10.21079/11681/47114.

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This work was in response to the Defense Logistic Agency’s (DLA) Subsistence Network Broad Agency Announcement, BAA-0003-16 addressing 2019 NDAA Section 329 that states packaging materials used for Meals Ready-to-Eat (MRE) that contact food products must be free of per- and polyfluoroalkyl substances (PFAS). This was addressed by determining the presence or absence of PFAS on MREs by extraction followed by gas chromatography mass spectrometry (GC-MS) and liquid chromatography tandem mass spectrometry (LC-MS/MS). Any samples positive for PFAS were quantitated using LC triple quadrupole (QqQ) MS at the US Army Engineering and Research Development Center (ERDC) and by high resolution quadrupole time-of-flight (qTOF) MS and GC-MS at Oregon State University (OSU).

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Author, Not Given. Compilation of contract research for the Materials Engineering Branch, Division of Engineering: Annual report for FY 1988. Office of Scientific and Technical Information (OSTI), May 1989. http://dx.doi.org/10.2172/6152893.

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Mandelbaum, Jay, and Danny L. Reed. Value Engineering Change Proposals in Supplies or Services Contracts. Fort Belvoir, VA: Defense Technical Information Center, September 2006. http://dx.doi.org/10.21236/ada461648.

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Clement, Michael. Engineering With Nature website user guide. Engineer Research and Development Center (U.S.), March 2022. http://dx.doi.org/10.21079/11681/43440.

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The Engineering With Nature (EWN) program is a high-profile effort that aims to deliver cost-effective, broadly beneficial solutions to natural re-source and sustainability challenges across the nation. A portion of this is accomplished through the use of the EWN website, which features news, podcasts, articles, and more. The content on the EWN website serves to educate and inform hundreds of visitors monthly. This content is generated and managed by EWN team members with web development experience, as it requires manually editing the website HTML and staging changes on a development server. With the EWN website 2.0, a new website framework (WordPress) has been implemented that will save content managers time and effort by providing a front-end user interface (UI) to enable the uploading, staging, and approval of new content for the website, along with a visual refresh to herald the impending release of season 2 of the EWN Podcast. This document’s purpose is to demonstrate the functionality of the new EWN website and provide instructional material for those managing content via the new EWN website.

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Tulin, Marshall P. Final Report on Contract N00014-86-K-0866 (California University, Ocean Engineering Laboratory). Fort Belvoir, VA: Defense Technical Information Center, April 1991. http://dx.doi.org/10.21236/ada244471.

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Schmorrow, Dylan. Sociocultural Behavior Research and Engineering in the Department of Defense Context. Fort Belvoir, VA: Defense Technical Information Center, September 2011. http://dx.doi.org/10.21236/ada549230.

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