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Dissertations / Theses on the topic 'Micro cantilever fracture test'

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1

Armstrong, D. E. J. "Measuring elastic, plastic and fracture properties using micro-cantilever testing." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526568.

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2

Cate, Evan Derek. "Design, Implementation, and Test of a Micro Force Displacement System." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1192.

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The design and implementation of a micro-force displacement system was completed to test the force-displacement characteristics of square silicon diaphragms with side lengths of 4mm, 5mm, and 7mm with a thickness of 10um. The system utilizes a World Precision Instruments Fort 10g force transducer attached to a World Precession Instruments TBM4M amplifier. A Keithley 2400 source meter provided data acquisition of the force component of the system. A micro prober tip was utilized as the testing probe attached to the force transducer with a tip radius of 5um. The displacement of samples was measu
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3

Pothier, Arnaud. "Conception, réalisation et test de micro-commutateurs micro-electromécaniques et application aux circuits hyperfréquences reconfigurables." Limoges, 2003. http://aurore.unilim.fr/theses/nxfile/default/6cf0371e-bf80-4a5b-b4de-07c554a9bbcb/blobholder:0/2003LIMO0058.pdf.

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La technologie MEMS pour les applications hyperfréquences, s'est développée depuis quelques années avec pour objectif d'améliorer les performances des circuits et dispositifs microondes. De nombreux composants ont été développés, démontrant alors une importante réduction des pertes et une plus grande linéarité que leurs principaux concurrents: les composants semi-conducteurs. Notre étude a porté donc sur la conception d'un micro-commutateur et son intégration dans des circuits microondes reconfigurables. Dans un premier temps, nous présentons dans le manuscrit un état de l'art de la technologi
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4

Majeed, Moiz, and Teja Geesala Rahitya Venkata. "Characterization of thin laminate interface by using Double Cantilever Beam and End Notched Flexure tests." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-20852.

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This thesis is intended to identify the mode I and mode II fracture toughness to characterize the thin laminate interface by using the Double Cantilever Beam test (DCB) and End Notched Flexure test (ENF). This study’s thin laminate was Polyethylene Terephthalate and Low-Density Polyethylene (PET-LDPE), which is mostly used by packaging industries in the manufacturing of packages to store liquid food. As PET-LDPE film is very flexible and difficult to handle, DCB and ENF tests cannot be performed directly so, sheet metal (Aluminium) was used as carrier material. PET-LDPE film is placed between
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5

Pothier, Arnaud. "CONCEPTION, REALISATION ET TEST DE MICROCOMMUTATEURSMICRO-ELECTROMECANIQUES ETAPPLICATION AUX CIRCUITS HYPERFREQUENCESRECONFIGURABLES." Phd thesis, Université de Limoges, 2003. http://tel.archives-ouvertes.fr/tel-00119368.

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La technologie MEMS pour les applications hyperfréquences, s'est développée depuis quelques années<br />avec pour objectif d'améliorer les performances des circuits et dispositifs microondes. De nombreux composants<br />ont été développés, démontrant alors une importante réduction des pertes et une plus grande linéarité que leurs<br />principaux concurrents: les composants semi-conducteurs. Notre étude a porté donc sur la conception d'un<br />micro-commutateur et son intégration dans des circuits microondes reconfigurables.<br />Dans un premier temps, nous présentons dans le manuscrit un état
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6

Islam, Mohammad Majharul. "Global-local Finite Element Fracture Analysis of Curvilinearly Stiffened Panels and Adhesive Joints." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/38687.

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Global-local finite element analyses were used to study the damage tolerance of curvilinearly stiffened panels; fabricated using the modern additive manufacturing process, the so-called unitized structures, and that of adhesive joints. A damage tolerance study of the unitized structures requires cracks to be defined in the vicinity of the critical stress zone. With the damage tolerance study of unitized structures as the focus, responses of curvilinearly stiffened panels to the combined shear and compression loadings were studied for different stiffenersâ height. It was observed that the mag
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7

Ranade, Shantanu Rajendra. "Performance Evaluation and Durability Studies of Adhesive Bonds." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/64990.

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In this dissertation, four test approaches were developed to characterize the adhesion performance and durability of adhesive bonds for specific applications in areas spanning from structural adhesive joints to popular confectionaries such as chewing gum. In the first chapter, a double cantilever beam (DCB) specimen geometry is proposed for combinatorial fracture studies of structural adhesive bonds. This specimen geometry enabled the characterization of fracture energy vs. bondline thickness trends through fewer tests than those required during a conventional "one at a time" characterization
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8

Xu, Shuangyan. "Evaluating Thermal and Mechanical Properties of Electrically Conductive Adhesives for Electronic Applications." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/27112.

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The objective of this study was to evaluate and gain a better understanding of the short-term impact performance and the long-term durability of electrically conductive adhesives for electronic interconnection applications. Three model conductive adhesives, designated as ECA1, ECA2 and ECA3, supplied by Emerson & Cuming, were investigated, in conjunction with printed circuit board (PCB) substrates with metallizations of Au/Ni/Cu and Cu, manufactured by Triad Circuit Inc. Effects of environmental aging on the durability of conductive adhesives and their joints were evaluated. All the samples
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9

Parvatareddy, Hari. "Durability of Polyimide Adhesives and Their Bonded Joints for High Temperature Applications." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/29554.

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The objective of this study was to evaluate and develop an understanding of durability of an adhesive bonded system, for application in a future high speed civil transport (HSCT) aircraft structure. The system under study was comprised of Ti-6Al-4V metal adherends and a thermosetting polyimide adhesive, designated as FM-5, supplied by Cytec Engineered Materials, Inc. An approach based on fracture mechanics was employed to assess Ti-6Al-4V/FM-5 bond durability. Initially, wedge tests were utilized to find a durable surface pretreatment for the titanium adherends. Based on an extensive scree
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10

Vlk, Václav. "Mechanické vlastnosti a lomové chování svarových spojů a základních materiálů přívodního potrubí vodní turbíny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231314.

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The master thesis is focussed on evaluation of mechanical properties and fracture behaviour of basic materials and weld joints of a water turbine supply pipe. The results of tensile tests, fracture toughness tests, hardness and micro-hardness tests and further chemical and metallography analysis are used for operating degradation level evaluation of the construction material and also for a residual operating recognition of the second, identical specimen of supply pipe.
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11

Baumgarten, Lars. "Gesteinsmechanische Versuche und petrophysikalische Untersuchungen – Laborergebnisse und numerische Simulationen." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2016. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-202612.

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Dreiaxiale Druckprüfungen können als Einstufenversuche, als Mehrstufenversuche oder als Versuche mit kontinuierlichen Bruchzuständen ausgeführt werden. Bei der Anwendung der Mehrstufentechnik ergeben sich insbesondere Fragestellungen hinsichtlich der richtigen Wahl des Umschaltpunktes und des optimalen Verlaufs des Spannungspfades zwischen den einzelnen Versuchsstufen. Fraglich beim Versuch mit kontinuierlichen Bruchzuständen bleibt, ob im Versuchsverlauf tatsächlich Spannungszustände erfasst werden, welche die Höchstfestigkeit des untersuchten Materials repräsentieren. Die Dissertation greift
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12

CARUSO, VALENTINA. "DEGRADATION OF ORGANIC AND MINERAL PHASES IN BURIED HUMAN REMAINS: THE EARTH SCIENCES ANALYTICAL CHARACTERIZATION." Doctoral thesis, Università degli Studi di Milano, 2017. http://hdl.handle.net/2434/478504.

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The thesis focuses on the characterization of the alteration of the mineral and organic phases, investigated with different approaches, of human bone tissue from different burial contexts, with ages spanning from the Late Roman period to our time. This topic is very important in paleontological, archaeo-anthropological and forensic contexts in order to understand the taphonomic agents and then to provide biological data as possibly to discern human behavior in ancient funerary as well as in recent forensic contexts. It is well-known that peri and post mortem events may leave marks that have to
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13

Chu, Chi-Ming, and 朱啟銘. "Fracture Toughness Test of Thin Films in Air by Mixed Mode Double Cantilever Beams." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/70479472231422052528.

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碩士<br>逢甲大學<br>機械工程學所<br>100<br>Most materials utilized in micro-electro-mechanical devices are classified as brittle ceramic materials. The strength of a brittle material is related to the distribution of defects, which randomly changes. Thin film multilayers are commonly adopted in advanced micro-electro-mechanical devices such as micro cantilevers. One of the main reasons that cause the failure of the multilayer is the difference between coefficients of thermal expansion and the interface delamination resulted from mechanical stresses. However, there is limited knowledge about the degradatio
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14

Cheng, Jen-Hsiang, and 鄭仁翔. "Fracture toughness test of thin films in liquid by the mixed-mode double cantilever beams." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/87762687123334680177.

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碩士<br>逢甲大學<br>機械工程學所<br>100<br>In this thesis, four different types of thin film multi-layers are fabricated on 4-inch wafers by the MEMS fabrication technique. These 4 multi-layers are Si3N4/SiO2/Si, Si3N4/Si, PZT/Pt/Ti/Si and PZT/Al/Si. The specimen size is 40mm×5mm. Force testing machine with mixed mode double cantilever beam (MMDCB) mechanism are adopted to measure fracture toughness of four different types of thin film multi-layers soaked in either of pure water, deionized water or normal saline. When phase angle increases, average interfacial force increases accordingly. The main rea
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15

Baumgarten, Lars. "Gesteinsmechanische Versuche und petrophysikalische Untersuchungen – Laborergebnisse und numerische Simulationen." Doctoral thesis, 2015. https://tubaf.qucosa.de/id/qucosa%3A23031.

Full text
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Dreiaxiale Druckprüfungen können als Einstufenversuche, als Mehrstufenversuche oder als Versuche mit kontinuierlichen Bruchzuständen ausgeführt werden. Bei der Anwendung der Mehrstufentechnik ergeben sich insbesondere Fragestellungen hinsichtlich der richtigen Wahl des Umschaltpunktes und des optimalen Verlaufs des Spannungspfades zwischen den einzelnen Versuchsstufen. Fraglich beim Versuch mit kontinuierlichen Bruchzuständen bleibt, ob im Versuchsverlauf tatsächlich Spannungszustände erfasst werden, welche die Höchstfestigkeit des untersuchten Materials repräsentieren. Die Dissertation greift
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