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Gotowe bibliografie tematyczne / Mechanical testing

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Gotowa bibliografia na temat „Mechanical testing”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 18 maja 2024

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Artykuły w czasopismach na temat "Mechanical testing"

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Wolfenden, A., i JH Westbrook. "Mechanical Testing". Journal of Testing and Evaluation 19, nr 3 (1991): 261. http://dx.doi.org/10.1520/jte12567j.

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Mordfin, Leonard. "MECHANICAL TESTING REVITALIZED". Experimental Techniques 14, nr 5 (wrzesień 1990): 20. http://dx.doi.org/10.1111/j.1747-1567.1990.tb01475.x.

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Molnár, László, Enikő Solti, Attila Bojtos i Antal Huba. "Mechanical Testing of Tendon". Materials Science Forum 537-538 (luty 2007): 425–30. http://dx.doi.org/10.4028/www.scientific.net/msf.537-538.425.

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This paper presents an overview about results of mechanical testing of human tendon. We are dealing with the main function of tendon and touching on typical insurance of tendon and reconstruction of them. Since the material characteristic of tendon and dynamic models of them are not known there was made a lot of uniaxial tension test and based on measuring results built up a linear lumped model for dynamic simulation using the synthesis method. As results we can already provide quantitative data about mechanical bearing capacity of tendon beside known qualitative categories. Paper shows a well working fixing technology for tendons during tension test.

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Stokes, Ian A. "Mechanical Testing of Instrumentation". Spine 23, nr 21 (listopad 1998): 2263–64. http://dx.doi.org/10.1097/00007632-199811010-00002.

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Hall, Malcolm. "Mechanical testing of plastics". Polymer Testing 5, nr 4 (1985): 315–16. http://dx.doi.org/10.1016/0142-9418(85)90023-6.

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Ogawa, Takeshi, Akira Miyamoto, Naoya Koyama i Tadashi Ohsawa. "OS10W0154 Mechanical properties of lead-free solders predicted by indentation testing". Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2003.2 (2003): _OS10W0154. http://dx.doi.org/10.1299/jsmeatem.2003.2._os10w0154.

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Tan, Eunice Phay Shing, Sin Yee Ng i Chwee Teck Lim. "OS5-2-2 Mechanical testing of single micro and nanoscale fibers". Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2007.6 (2007): _OS5–2–2–1—_OS5–2–2–5. http://dx.doi.org/10.1299/jsmeatem.2007.6._os5-2-2-1.

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Normandin, Brett M., David J. Tennent, Todd H. Baldini, Alesia M. Blanchard i Jason T. Rhodes. "Mechanical Testing of Epiphysiodesis Screws". Orthopedics 41, nr 2 (29.01.2018): e240-e244. http://dx.doi.org/10.3928/01477447-20180123-01.

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Klausnitzer, E. N. "Micro-Specimens for Mechanical Testing". Materials Testing 33, nr 5 (1.05.1991): 132–34. http://dx.doi.org/10.1515/mt-1991-330511.

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WAKI, Hiroyuki. "Testing Method for Mechanical Property :". Journal of The Surface Finishing Society of Japan 64, nr 5 (2013): 280–84. http://dx.doi.org/10.4139/sfj.64.280.

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Rozprawy doktorskie na temat "Mechanical testing"

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Lillehei, Peter Thomas. "Single molecule mechanical testing". Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/31044.

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Johnston, James Duncan. "Mechanical testing of the scapholunate ligament". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2002. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ65628.pdf.

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Rioux, Robert A. "Mechanical Testing of Coated Paper Systems". Fogler Library, University of Maine, 2008. http://www.library.umaine.edu/theses/pdf/RiouxRA2008.pdf.

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Fahd, Aly. "Mechanical and ultrasound testing of bone". Ann Arbor, Mich. : ProQuest, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1434828.

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Thesis (M.S. in Mechanical Engineering)--S.M.U.
Title from PDF title page (viewed May 23, 2007). Source: Masters Abstracts International, Volume: 44-06, page: 2967. Adviser: Yildirim Hurmuzlu. Includes bibliographical references.

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Robusto, Francesco. "Accelerated life testing in mechanical design". Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3424672.

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The introduction of new products on the market is a time-consuming process, which typically includes both design and testing phases. Often, the experimental validation phase significantly affects the overall process time. Indeed, in many industrial sectors, the product development procedure is based on trial and error methodologies. Intermediate validation tests are performed on full-scale physical prototypes and, based on their outcome, the design is updated (in the case of a negative result) or validated (if the result is positive). The efficiency of this method in terms of time-resources is notoriously sub-optimal. To improve the efficiency of this process it is, for example, possible to exploit accelerated test methodologies, which consist in subjecting the product to test conditions that exceed its actual working conditions. In this way, a reduction in the number of cycles necessary to bring the component to final failure can be achieved, with obvious beneficial effects on the efficiency of the process. Another way to accelerate the test is to switch from testing the top-level assembly to performing tests on subassemblies or individual components. It is however mandatory, to ensure that the results obtained with these test methods are useful for the design, to take appropriate precautions. For example, it is essential to preserve the original failure mode of the component. To do this, it is necessary, among other things, to know the relationship between the boundary conditions of the entire assembly and the stresses of the individual components. In the present paper, the methodology described above is illustrated with reference to its application to locking industry components (demonstrator). Several experimental tests have been carried out, in order to characterize the fatigue life and wear resistance of the materials involved in the construction of the demonstrator. Numerical FEM models were also developed to determine the stresses of the sub-assemblies and components of the demonstrator during the test phase. Combining the experimental results with the numerical ones, it was possible to develop an analytical model. Such model allows estimating the endurance of the demonstrator when subjected to accelerated tests. The model has shown a good correlation with experimental results. The principles underlying this procedure can be applied, without any loss in terms of generality, to many sectors of the industry.
L'introduzione di nuovi prodotti sul mercato è un processo di lunga durata, che comprende tipicamente sia fasi di progettazione che di sperimentazione. Sovente, la fase di validazione sperimentale condiziona notevolmente i tempi complessivi del processo. Infatti, in molti settori industriali, la procedura di sviluppo prodotto è basata su metodologie di tipo trial and error. Prove di validazione intermedie vengono eseguite su prototipi fisici in scala reale, ed in base all'esito di queste il design viene rielaborato (in caso di esito negativo) o validato (se l'esito è positivo). L'efficienza di tale metodo sotto il profilo temporale è, notoriamente, sub-ottimale. Per migliorare l'efficienza di tale processo è, ad esempio, possibile sfruttare metodologie di prova accelerate, che consistono nel sottoporre il prodotto ad una condizione di prova più gravosa rispetto alle normali condizioni di lavoro. In tale modo, si può conseguire una riduzione del numero di cicli necessari a portare a rottura il componente, con evidenti ricadute vantaggiose sull'efficienza del processo. Un'ulteriore modalità di accelerazione della prova consiste nel passare da prova sull'assieme globale a prova sui sottoassiemi o singoli componenti. È tuttavia obbligatorio, affinché i risultati ottenuti mediante tali metodologie di prova siano utili per la progettazione, adottare opportune precauzioni. Ad esempio, è fondamentale preservare la modalità di rottura originaria del componente. Per fare ciò, si rende necessario, fra le altre cose, conoscere la relazione tra le condizioni al contorno dell'intero assieme e le sollecitazioni dei singoli componenti. Nel presente elaborato, la metodologia sopra descritta viene illustrata facendo riferimento alla sua applicazione a componenti del settore serraturiero (dimostratore). Sono stati effettuati numerosi test sperimentali, per caratterizzare la vita a fatica e la resistenza all'usura dei materiali coinvolti nella costruzione del dimostratore. Sono inoltre stati sviluppati modelli numerici FEM per determinare le sollecitazioni dei sottoassiemi e componenti del dimostratore durante la fase di test. Combinando i risultati sperimentali con quelli numerici, è stato possibile sviluppare un modello analitico in grado di stimare con buona approssimazione la vita effettiva del dimostratore, quando sottoposto a prove accelerate. I principi alla base di questa procedura possono essere applicati, senza perdita di generalità, a numerosi settori dell'industria.

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Connally, John Arnold. "Micromechanical fatigue testing". Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12756.

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Poissant, Jeffrey. "Microscale mechanical testing of individual collagen fibers". Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=95075.

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Collagen is a key constituent for a large number of biological materials including bone, tendon, cartilage, skin and fish scales. Understanding the mechanical behavior of collagen's microscale structural components (fibers and fibrils) is therefore of utmost importance for fields such as biomimetics and biomedical engineering. However, the mechanics of collagen fibers and fibrils remain largely unexplored. The main research challenges are the small sample sizes (diameters less than 1 µm) and the need to maintain physiologically relevant conditions. In this work, a microscale mechanical testing device (MMTD) capable of measuring the stress-strain response of individual collagen fibers and fibrils was developed. The MMTD consists of: (i) a transducer from a commercial nanoindenter to measure load and displacement, (ii) an optical microscope to observe the deformation of the sample in-situ and (iii) micromanipulators to isolate, position and fix samples. Collagen fibers and fibrils were extracted from fish scales using a novel dissection procedure and tested using the MMTD. A variety of tensile tests were performed including monotonic loading and cyclic tests with increasing loading rate or maximum displacement. The monotonic test results found that the elastic modulus, ultimate tensile strength and strain at failure range from 0.5 to 1.3 GPa, 100 to 200 MPa and 20% to 60%, respectively. The cyclic tests revealed that the largest increase in damage accumulation occurs at strains between 10% and 20%, when hydrogen bonds at the molecular level are ruptured. Further straining the fibril causes little additional damage accumulation and signals the approach of failure. The addition of water is shown to increase damage tolerance and strain to failure.
Le collagène est un constituant clé pour plusieurs matériaux biologiques incluant les os, tendons et écailles de poisson. Bien comprendre le comportement mécanique des composantes microstructurales du collagène (fibres et fibrilles) est important pour les domaines tel que la biomimétique et l'ingénierie biomédicale. Les principales difficultés sont la petite taille d'échantillons (< 1 µm) et le besoin de maintenir l'échantillon hydraté. Dans ce projet, un système de chargement micromécanique (SCMM) capable de mesurer le comportement mécanique de fibres et fibrilles de collagène a été développé. Le SCMM est composé : (i) d'un senseur provenant d'un nanoindenteur pour mesurer les forces et déplacements, (ii) d'un microscope optique pour observer la déformation d'échantillons in-situ et (iii) de micromanipulateurs pour isoler, positionner et fixer les échantillons. Des fibres et fibrilles de collagène ont été extraites d'écailles de poisson par voie d'une nouvelle procédure et ont été chargées par le SCMM. Plusieurs expériences ont été exécutées incluant des chargements en tension monotone et des chargements cycliques qui varieraient soit le taux de chargement ou le déplacement maximal. Les résultats de chargements monotones démontrent que le module d'élasticité, la contrainte ultime et la déformation au point de rupture se retrouvent entre 0.5 et 1.3 GPa, 100 et 200 MPa et 20% et 60%, respectivement. Les chargements cycliques révèlent que la plus grande augmentation d'endommagement du matériel se produit lors de déformations entre 10% et 20%, ce qui correspond à la rupture de ponts d'hydrogène au niveau moléculaire. Des déformations supplémentaires causent peu de dommage additionnel et signalent la rupture. L'ajout d'eau augmente l'endommagement que peut tolérer le matériau et augmente la déformation au point de rupture.

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Basterfield, Robert. "Interpretation of mechanical testing measurements for pastes". Thesis, Imperial College London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409257.

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Jailin, Clément. "Projection-based in-situ 4D mechanical testing". Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLN034/document.

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L'analyse quantitative de volumes 3D obtenus par tomographie permet l’identification et la validation de modèles. La séquence d’analyse consiste en trois problèmes inverses successifs : (i) reconstruction des volumes (ii) mesure cinématique par corrélation d'images volumiques (DVC) et (iii) identification. Les très longs temps d’acquisition nécessaires interdisent de capter des phénomènes rapides. Une méthode de mesures, Projection-based Digital Volume Correlation (P-DVC), raccourcit la séquence précédente en identifiant les quantités clés sur les projections. Cette technique réduit jusqu'à 2 le nombre de radiographies utilisées pour le suivi de l’essai au lieu de 500 à 1000. Cette thèse étend cette approche en réduisant la quantité d’informations acquises, rendant ainsi accessibles des phénomènes de plus en plus rapides et repoussant les limites de la résolution temporelle. Deux axes ont ainsi été développés : - d’une part, l'utilisation de différentes régularisations, spatiales et temporelles des champs 4D (espace/temps) mesurés généralise la méthode P-DVC (avec volume de référence) à l'exploitation d’une seule radiographie par étape de chargement. L’essai peut désormais être réalisé de façon continue, en quelques minutes au lieu de plusieurs jours; - d’autre part, la mesure du mouvement peut être utilisée pour corriger le volume reconstruit lui-même. Cette observation conduit à proposer une nouvelle procédure de co-détermination du volume et de sa cinématique (sans prérequis), ce qui ouvre ainsi de nouvelles perspectives pour l’imagerie des matériaux et médicale où parfois le mouvement ne peut pas être interrompu. Le développement de ces deux axes permet d’envisager de nouvelles façons de réaliser les essais, plus rapides et plus centrés sur l’identification de quantités clés. Ces méthodes sont compatibles avec les récents développements « instrumentaux » de la tomographie rapide en synchrotron ou laboratoire, et permettent de réduire de plusieurs ordres de grandeurs les temps d’acquisition et les doses de rayonnement
The quantitative analysis of 3D volumes obtained from tomography allows models to be identified and validated. It consists of a sequence of three successive inverse problems: (i) volume reconstruction (ii) kinematic measurement from Digital Volume Correlation (DVC) and (iii) identification. The required very long acquisition times prevent fast phenomena from being captured.A measurement method, called Projection-based DVC (P-DVC), shortens the previous sequence and identifies the kinematics directly from the projections. The number of radiographs needed for tracking the time evolution of the test is thereby reduced from 500 to 1000 down to 2.This thesis extends this projection-based approach to further reduce the required data, letting faster phenomena be captured and pushing the limits of time resolution. Two main axes were developed:- On the one hand, the use of different spatial and temporal regularizations of the 4D fields (space/time) generalizes the P-DVC approach (with a known reference volume) to the exploitation of a single radiograph per loading step. Thus, the test can be carried out with no interruptions, in a few minutes instead of several days.- On the other hand, the measured motion can be used to correct the reconstructed volume itself. This observation leads to the proposition of a novel procedure for the joint determination of the volume and its kinematics (without prior knowledge) opening up new perspectives for material and medical imaging where sometimes motion cannot be interrupted.end{itemize}The development of these two axes opens up new ways of performing tests, faster and driven to the identification of key quantities of interest. These methods are compatible with the recent ``hardware" developments of fast tomography, both at synchrotron beamlines or laboratory and save several orders of magnitude in acquisition time and radiation dose

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Jones, Daniel Brian. "Micro-mechanical testing of interfacially adsorbed protein networks". Thesis, University of Cambridge, 2002. https://www.repository.cam.ac.uk/handle/1810/251831.

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Książki na temat "Mechanical testing"

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Heberling, DT, red. Automation of Mechanical Testing. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 1993. http://dx.doi.org/10.1520/stp1208-eb.

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T, Heberling David, red. Automation of mechanical testing. Philadelphia, PA: ASTM, 1993.

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Birmingham), Autotech 1991 (1991. Mechanical components and testing. [London]: Institution of Mechanical Engineers, 1991.

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Gdoutos, Emmanuel, i Maria Konsta-Gdoutos. Mechanical Testing of Materials. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-45990-0.

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M, Steen, i Lohr R. D, red. Ultra high temperature mechanical testing. Cambridge: Woodhead, 1995.

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Standardization, International Organization for. Mechanical testing of metallic materials. Geneve: International Organization for Standardization, 1988.

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Mechanical wear fundamentals and testing. Wyd. 2. New York: M. Dekker, 2004.

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B, Magalas L., i Akademia Górniczo-Hutnicza im. S. Staszica w Krakowie. Dept. of Physical Metallurgy., red. Mechanical spectroscopy. Cracow: Wydawnictwo AGH Publication, 1991.

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Haddad, Y. M. Mechanical behaviour of engineering materials. Dordrecht: Kluwer Academic Publishers, 2000.

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Saunders, Marnie M. Mechanical Testing for the Biomechanics Engineer. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-031-01662-2.

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Części książek na temat "Mechanical testing"

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Sygusch, Nikolai. "Mechanical Testing". W Mechanik, Werkstoffe und Konstruktion im Bauwesen, 15–39. Wiesbaden: Springer Fachmedien Wiesbaden, 2019. http://dx.doi.org/10.1007/978-3-658-27113-8_3.

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Carter, C. Barry, i M. Grant Norton. "Mechanical Testing". W Ceramic Materials, 297–315. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-3523-5_16.

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Bolton, William, i R. A. Higgins. "Mechanical testing". W Materials for Engineers and Technicians, 29–50. Seventh edition. | Abingdon, Oxon ; New York, NY : Routledge, 2021.: Routledge, 2020. http://dx.doi.org/10.1201/9781003082446-3.

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Doddamani, Mrityunjay, H. S. Bharath, Pavana Prabhakar i Suhasini Gururaja. "Mechanical Testing". W Materials Horizons: From Nature to Nanomaterials, 53–110. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1730-3_5.

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Hylton, Donald C. "Mechanical Properties". W Understanding Plastics Testing, 17–35. München: Carl Hanser Verlag GmbH & Co. KG, 2004. http://dx.doi.org/10.3139/9783446412859.003.

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C. Hylton, Donald. "Mechanical Properties". W Understanding Plastics Testing, 17–35. München, Germany: Carl Hanser Verlag GmbH & Co. KG, 2004. http://dx.doi.org/10.1007/978-3-446-41285-9_3.

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Grellmann, Wolfgang, i Sabine Seidler. "Mechanical Properties of Polymers". W Polymer Testing, 71–227. Wyd. 3. München: Carl Hanser Verlag GmbH & Co. KG, 2022. http://dx.doi.org/10.3139/9781569908075.004.

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Grellmann, Wolfgang, i Sabine Seidler. "Mechanical Properties of Polymers". W Polymer Testing, 71–227. München, Germany: Carl Hanser Verlag GmbH & Co. KG, 2022. http://dx.doi.org/10.1007/978-1-56990-807-5_4.

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Capps, Rodger N., i Linda L. Beumel. "Dynamic Mechanical Testing". W ACS Symposium Series, 63–78. Washington, DC: American Chemical Society, 1990. http://dx.doi.org/10.1021/bk-1990-0424.ch004.

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Naranjo, Alberto, María del Pilar Noriega E., Tim A. Osswald, Alejandro Roldán-Alzate i Juan Diego Sierra. "Mechanical Properties". W Plastics Testing and Characterization, 185–261. München: Carl Hanser Verlag GmbH & Co. KG, 2008. http://dx.doi.org/10.3139/9783446418530.006.

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Streszczenia konferencji na temat "Mechanical testing"

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Tomozawa, Minoru. "Mechanical Fatigue of Silica Glass". W Optical Fabrication and Testing. Washington, D.C.: Optica Publishing Group, 1987. http://dx.doi.org/10.1364/oft.1987.waa2.

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Mechanical strength of glass decreases with time when stressed in an atmosphere containing water. Also, the greater the tensile stress on the glass, the shorter the time to failure if the stress is held constant. This can limit the service life of various glass products such as optical wave guides made of silica glass fibers. Often this mechanical fatigue is explained by slow crack growth [1]. Namely, it is postulated that a small crack exists on the glass surface and that this crack propagates slowly under an applied stress leading eventually to a failure. The failure time, then, is the time required for a crack to grow to a critical length. The role of the water in the environment is believed to be the acceleration of the crack growth rate. According to this explanation, one can estimate the service life-time of a glass under stress using data on slow crack growth rate. Thus there have been numerous measurements of the crack growth rate of glass under varied stress and environment. In this explanation of mechanical fatigue based upon slow crack growth, it is tacitly assumed that the crack tip geometry of the specimen which shows mechanical fatigue is the same as that of the propagating crack observed in the crack growth measurement. If this assumption is not valid and the crack tip geometry of the sample is different from that of the propagating crack, then the explanation of the mechanical fatigue based upon the slow crack growth would not be valid. In this paper, therefore, first, the crack tip geometry of silica glass (and high silica glass) after various thermal and chemical treatment will be discussed. Subsequently, the fatigue characteristics of these treated glass will be described and will be related to the crack tip geometry.

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Franke, Michael, Andre Küsters, Thomas Rinkens, Franz Maassen i Hans Brüggemann. "Mechanical Testing - Still Necessary!" W SAE World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2007. http://dx.doi.org/10.4271/2007-01-1768.

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Bennett, Jean M., Thomas C. Bristow, Kevork Arackellian i James C. Wyant. "Surface Profiling With Optical and Mechanical Instruments". W Optical Fabrication and Testing. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/oft.1986.thb4.

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Two types of interferometers and a mechanical stylus-type instrument have been used to make surface profile measurements on the same samples. All had comparable height sensitivities, of the order of 1 Å rms, but different lateral resolutions. The Optel profilometer1 is based on the principle of the Nomarski differential interference contrast microscope in which two beams of light separated by 0.3 μm are measured by two detectors. Values of the surface slope are calculated from the detector signals; integration yields a surface profile. The Wyko heterodyne profilometer2 is based on the Mireau interferometer. One light beam is reflected from the sample while a second beam is diverted by a beam splitter to a reference mirror located between the microscope objective lens and the sample. A 1024 element linear diode array measures the phase of the interference fringe pattern which is then transformed into a surface profile. In the Talystep instrument3 a 1 μm radius diamond stylus contacts the surface with a 1-2 mg loading that is light enough not to damage the surface. The vertical motion of the stylus as it moves across the surface is converted into a digitized electrical signal that directly gives the surface profile. Results of measurements made on different types of surfaces using the three instruments will be compared to show repeatability, height sensitivity, and lateral resolution. Special features of each instrument will also be discussed.

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Kececioglu, Dimitri, i Dingjun Li. "Accelerated Testing of Mechanical Equipment". W SAE Aerospace Technology Conference and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1986. http://dx.doi.org/10.4271/861667.

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Matthewson, M. John. "Optical fiber mechanical testing techniques". W Critical Review Collection. SPIE, 1993. http://dx.doi.org/10.1117/12.181373.

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Kristiansen, Helge, Erik Kalland i Susanne Helland. "Mechanical Testing of Conductive Adhesives". W 2020 IEEE 8th Electronics System-Integration Technology Conference (ESTC). IEEE, 2020. http://dx.doi.org/10.1109/estc48849.2020.9229831.

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Klein, Steven A., Aleksandar Aleksov, Vijay Subramanian, Rajendra Dias, Pramod Malatkar i Ravi Mahajan. "Mechanical Testing for Stretchable Electronics". W ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-68215.

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Stretchable electronics have been a subject of increased research over the past decade [1–3]. Although stretchable electronic devices are a relatively new area for the semiconductor/electronics industries, recent market research indicates the market could be worth more than 900 million dollars by 2023 [4]. At CES (Consumer Electronics Show) in January 2016, two commercial patches were announced which attach to the skin to measure information about the user’s vitals and environmental conditions [5]. One of these measures the sun exposure of the user with a UV sensitive dye — which can communicate with the user’s cell phone to track the user’s sun exposure. Another device is a re-usable flexible patch which measures cardiac activity, muscle activity, galvanic skin response, and user’s motion. These are just two examples of the many devices that will be developed in the coming years for consumer and medical use. This paper investigates mechanical testing methods designed to test the stretching capabilities of potential products across the electronics industry to help quantify and understand the mechanical integrity, response, and the reliability of these devices. Typically, the devices consist of stiff modules connected by stretchable traces [6]. They require electrical and mechanical connectivity between the modules to function. In some cases, these devices will be subject to bi-axial and/or cyclic mechanical strain, especially for wearable applications. The ability to replicate these mechanical strains and understand their effect on the function of the devices is critical to meet performance, process and reliability requirements. There has been a test method proposed recently for harsh / high-rate testing (shock) of stretchable electronics [7]. The focus of the approach presented in the paper aims to simulate expected user conditions in the consumer and medical fields, whereas earlier research was focused on shock testing. In this paper, methods for simulating bi-axial and out-of-plane strains similar to what may occur in a wearable device on the human body are proposed. Electrical and / or optical monitoring (among other methods) can be used to determine cycles to failure depending on expected failure modes. Failure modes can include trace damage in stretchable regions, trace damage in functional component regions, or bulk stretchable material damage, among others. Three different methods of applying mechanical strain are described, including a stretchable air bladder method, membrane test method, and lateral expansion method. This work will describe a prototype of the air bladder method with initial results of the testing for example devices. The system utilizes an expandable bladder to roughly simulate the expansion of muscles in the human body. Besides strain and # of cycles, other variables such as humidity, temperature, ultraviolet exposure, and others can be utilized to determine their effect on the mechanical and electrical reliability of the devices.

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Sharpe, William N., Kevin Turner i Richard L. Edwards. "Electrostatic Mechanical Testing of Polysilicon". W ASME 1998 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/imece1998-1273.

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Abstract Polysilicon, which is vapor deposited, is by nature only a few microns thick. In typical MEMS applications, the structural features may also be only a few microns wide. Establishing the elastic and strength properties using specimens that are similar in size is quite a challenge. This paper describes a tensile test system that grips a large ‘paddle’ on the end of a tensile specimen with electrostatic force; this enables the testing of polysilicon specimens that have cross-sections as small as 1.5 × 2 microns. Polysilicon is a linear, brittle material and it is not difficult to measure its tensile strength, which is measured here to be on the order of 1.3 GPa. It is considerably more difficult to measure Young’s modulus, and two approaches are used here. In the first, strain is extracted from the force-displacement plot of the tensile test. The second uses two gold lines for laser interferometry to measure strain directly on the tensile specimen. Both approaches yield similar results, but the measured values are lower than the 169 GPa measured earlier on wider polysilicon specimens. Specimens 3.5 microns thick had a modulus of 142 ± 25 GPa, and those 1.5 microns thick showed 136 ± 14 Gpa. The techniques and procedures along with preliminary results are presented here.

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Hartmann, Peter. "Mechanical strength of optical glasses". W Optical Fabrication, Testing, and Metrology VI, redaktorzy Sven Schröder i Roland Geyl. SPIE, 2018. http://dx.doi.org/10.1117/12.2315074.

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Gabor, Andrew M., Rob Janoch, Andrew Anselmo, Jason L. Lincoln, Hubert Seigneur i Christian Honeker. "Mechanical load testing of solar panels — Beyond certification testing". W 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC). IEEE, 2016. http://dx.doi.org/10.1109/pvsc.2016.7750338.

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Raporty organizacyjne na temat "Mechanical testing"

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Mukherjee, Amiya K., i Jeffrey C. Gibelin. High Temperature Mechanical Testing Facilities. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 1988. http://dx.doi.org/10.21236/ada200565.

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Zhao, A., V. Guarino, K. Wood, T. Nephew, D. Ayres, A. Lee i FNAL. Eight plane IPND mechanical testing. Office of Scientific and Technical Information (OSTI), marzec 2008. http://dx.doi.org/10.2172/929643.

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Hayne, Mathew, Stuart Maloy i Carl Cady. Mechanical Testing of FeCrAl Tubing. Office of Scientific and Technical Information (OSTI), październik 2020. http://dx.doi.org/10.2172/1688729.

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McEachen, G. W. Carbon syntactic foam mechanical properties testing. Office of Scientific and Technical Information (OSTI), styczeń 1998. http://dx.doi.org/10.2172/654103.

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Wenski, E. G. Mechanical Testing Development for Reservoir Forgings. Office of Scientific and Technical Information (OSTI), maj 2000. http://dx.doi.org/10.2172/755481.

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Scott, J., i R. Brady. Mechanical testing of selected engineering plastics. Office of Scientific and Technical Information (OSTI), styczeń 1990. http://dx.doi.org/10.2172/6952346.

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Alexandreanu, B., X. Zhang, Y. Chen, W. Chen i M. Li. Mechanical Testing of Additively Manufactured Materials. Office of Scientific and Technical Information (OSTI), styczeń 2022. http://dx.doi.org/10.2172/1889412.

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Schmale, D. T., R. J. Bourcier i T. E. Buchheit. Description of a micro-mechanical testing system. Office of Scientific and Technical Information (OSTI), lipiec 1997. http://dx.doi.org/10.2172/515567.

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Witkin, David B. Mechanical Testing of Silicon Carbide on MISSE-7. Fort Belvoir, VA: Defense Technical Information Center, lipiec 2012. http://dx.doi.org/10.21236/ada566371.

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Mohr, H. O. PR-209-9217-R01 Mechanical Connections for J-lay. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), lipiec 1994. http://dx.doi.org/10.55274/r0012126.

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This report discusses the results of a testing program designed to simulate the operational conditions imposed on a J-lay installed, 13%" subsea pipeline assembled with mechanical connections. The program objective was to gain an understanding of the long-term sealing integrity of various mechanical connections. The connections were subjected to combinations of cyclic internal pressure, cyclic temperature, axial compression, and reverse torsion. The testing results show that the mechanically interlocked Reflange C-Con II connection and two premium threaded connections, the Hunting Fox and Sumitomo Varn Ace, when assembled utilizing suitable bonding agents, successfully resisted the imposed loads of this testing program. In addition, the selection of a proper bonding agent or adhesive to prevent reverse torque back out proved to be important as several of these agents were unreliable in preventing back out failures. The testing conditions applied to the mechanical connections in this test program are believed to be conservative, exceeding the maximum that in-service, J-lay installed pipelines are likely to experience. Therefore, this test program may be used to select a pipeline connection for this duty.

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