Relevant bibliographies by topics / Aktuationsverhalten von Smart Materials

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Aktuationsverhalten von Smart Materials'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Aktuationsverhalten von Smart Materials.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Aktuationsverhalten von Smart Materials"

1

Kletti, Nathalie. "Smart Factory Elements." VDI-Z 161, no. 04 (2019): 22–23. http://dx.doi.org/10.37544/0042-1766-2019-04-22.

Full text
Abstract:
Die Anforderungen an die Produktion sind enorm gewachsen, was zu einer gestiegenen Komplexität führt: zum Beispiel hohe Variantenvielfalt, kurze Lieferfristen, schnelle Prozessanpassungen, kleinere Losgrößen bis zu Losgröße 1. In Zeiten von Industrie 4.0 ist das ganz eindeutig ein Fall für die „Smart Factory“ – und diese wiederum benötigt bestimmte Prozesse und Funktionen, um den wachsenden Anforderungen gerecht zu werden: die Smart Factory Elements.
APA, Harvard, Vancouver, ISO, and other styles
2

Bay, Renate. "Intelligente Datenverarbeitung für die Welt von morgen." Konstruktion 73, no. 01-02 (2021): 26–29. http://dx.doi.org/10.37544/0720-5953-2021-01-02-26.

Full text
Abstract:
Ob vorausschauende Wartung, selbstlernende Maschinen oder ferngesteuerte Frachtschiffe: Sogenannte Smart Factory- oder auch Smart Shipping-Anwendungen lassen sich nur mit intelligenten Sensoren realisieren, in denen die immensen Datenmengen bereits vorverarbeitet und komprimiert werden. Smarte Sensoren schaffen ideale Voraussetzungen für diese Industrie 4.0-Applikationen. Mit intelligenten Inertialsensoren (vom lateinischen „inertia“ = Trägheit) bietet der Sensor-Spezialist ASC passende Messlösungen für verschiedenste Einsatzgebiete.
APA, Harvard, Vancouver, ISO, and other styles
3

Roth, Mathias. "Smart und revolutionär: Seilzuggeber für Hydraulik- und Teleskopzylinder." Konstruktion 70, S1 (2018): 50–52. http://dx.doi.org/10.37544/0720-5953-2018-s1-50.

Full text
Abstract:
Siko hat mit der SGH-Serie Seilzuggeber zur Positionsmessung von Hydraulikzylindern, Teleskopzylindern oder Kolbenspeichern entwickelt, die sich vollständig in die Zylinder integrieren lassen. Im Gespräch erklärt Mathias Roth, Branchenmanager Mobile Automation bei Siko, was die SGH- Technologie auszeichnet und was ihre Vorteile im Vergleich zu anderen Systemen sind.
APA, Harvard, Vancouver, ISO, and other styles
4

Zanotti, Tommaso, Francesco Maria Puglisi, and Paolo Pavan. "Smart Logic-in-Memory Architecture for Low-Power Non-Von Neumann Computing." IEEE Journal of the Electron Devices Society 8 (2020): 757–64. http://dx.doi.org/10.1109/jeds.2020.2987402.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Sahoo, Soumya Ranjan. "Active damping of geometrically nonlinear vibrations of smart composite shells using elliptical smart constrained layer damping treatment with fractional derivative viscoelastic layer." Journal of Intelligent Material Systems and Structures 31, no. 4 (December 25, 2019): 587–611. http://dx.doi.org/10.1177/1045389x19888800.

Full text
Abstract:
In this article, the performance of elliptical smart constrained layer damping treatments on active damping of geometrically nonlinear vibrations of doubly curved smart laminated composite shells is analyzed. The constraining layers of the smart constrained layer damping treatments comprised vertically/obliquely reinforced 1–3 piezoelectric composites, while the constrained layers of isotropic viscoelastic materials are modeled using the three-dimensional fractional order derivative model. A mesh-free model of the smart composite shells is developed for analyzing their nonlinear transient responses within the framework of a layerwise shear and normal deformation theory considering the von Kármán–type geometric nonlinearity. Thin, doubly curved laminated composite shells integrated with elliptical/rectangular smart constrained layer damping patches with different stacking sequences and boundary conditions are considered for presenting the numerical results. The numerical analyses demonstrate the higher effectiveness of the elliptical smart constrained layer damping treatments over the rectangular ones in attenuating the nonlinear vibrations of laminated composite shells.
APA, Harvard, Vancouver, ISO, and other styles
6

Rüttger, Siegfried. "Vorausschauende Instandhaltung in der Industrie 4.0." Konstruktion 70, no. 01-02 (2018): 14–16. http://dx.doi.org/10.37544/0720-5953-2018-01-02-14.

Full text
Abstract:
Vorausschauende Wartungs- und Service-Prozesse sind nur auf der Grundlage umfangreicher Daten möglich, die von Komponenten und Maschinen im Fertigungsprozess bereitgestellt werden. Diese Monitoring-Informationen können nun auch von Sicherheitskomponenten geliefert und in einer Cloud-Umgebung ausgewertet werden. Im Kontext von Industrie 4.0 gewährleistet die Sicherheitstechnologie damit nicht nur die Einhaltung von Sicherheitsstandards, sondern trägt gleichzeitig zur Erhöhung der Anlagenverfügbarkeit bei. Eine solche Lösung bietet die „Smart Safety Solution“ von Schmersal, die das Unternehmen erstmals auf der SPS IPC Drives 2017 vorstellte.
APA, Harvard, Vancouver, ISO, and other styles
7

Datta, Priyankar, and Manas Chandra Ray. "Effect of carbon nanotube waviness on smart damping of geometrically nonlinear vibrations of fuzzy-fiber reinforced composite plates." Journal of Intelligent Material Systems and Structures 30, no. 7 (February 19, 2019): 977–97. http://dx.doi.org/10.1177/1045389x19828481.

Full text
Abstract:
In this article, we present a finite element model for the three-dimensional analysis of smart constrained layer damping of geometrically nonlinear vibrations of laminated fuzzy-fiber reinforced composite plates. The three-dimensional fractional derivative constitutive relation is implemented for the viscoelastic layer. The constraining layer of the smart constrained layer damping treatment is composed of the vertically/obliquely reinforced 1–3 piezoelectric composites. The von Kármán–type nonlinear strain–displacement relations are used to incorporate the geometric nonlinearity in the model. The main aim of this article is to numerically investigate the effect of carbon nanotube waviness on the nonlinear smart damping. Several thin laminated substrate fuzzy-fiber reinforced composite plates with straight carbon nanotubes and wavy carbon nanotubes with different waviness in different planes are considered with various boundary conditions and stacking sequences to numerically compute their effect on smart damping. The performance of the obliquely reinforced 1–3 piezoelectric composites is discussed and the efficacy of the present smart finite element model in terms of active control authority is also presented.
APA, Harvard, Vancouver, ISO, and other styles
8

Berger, Jürgen. "Lichtwellenleiter – die Daten-Highways einer vernetzten Industrie." Konstruktion 69, no. 06 (2017): 26–28. http://dx.doi.org/10.37544/0720-5953-2017-06-26.

Full text
Abstract:
Datenkabel sind die heimlichen Stars von Industrie 4.0 und Digitalisierung. Ohne sie geht nichts, denn sie sind das Netz – nicht im übertragenen Sinn, sondern ganz konkret und physisch. Dennoch fristen sie ein ziemlich unspektakuläres Dasein als typisches C-Teil: kostengünstig im Einkauf, doch mit einem relativ hohen zeitlichen Bereitstellungsaufwand. Wird dies der Schlüsselrolle von Lichtwellenleitern auf dem Weg zur Smart Factory gerecht?
APA, Harvard, Vancouver, ISO, and other styles
9

Schili, Martina. "Qualitätskontrolle in High Speed dank leistungsstarker Kameratechnologie." Konstruktion 70, no. 04 (2018): 32–34. http://dx.doi.org/10.37544/0720-5953-2018-04-32.

Full text
Abstract:
Ob Soßen, Snacks oder Fertiggerichte abgefüllt und verpackt werden müssen – in der Verpackungstechnik und Lebensmittelindustrie zählen hoher Durchsatz und schnelle Formatwechsel – und das bei höchsten Qualitäts- und Hygienestandards. Hierzu müssen die eingesetzten Sensoren vor allem eines leisten: Sie müssen hohe Anforderungen an Leistung, Flexibilität und Hygiene miteinander verbinden. Dazu haben die Verpackungsmaschinen-Experten von SN Maschinenbau das Gesamtkonzept einer Beutelabfüllanlage, eingesetzt bei namhaften Unternehmen in der Lebensmittelindustrie, neu durchdacht, innovativ gelöst und bei der Verifizierung von Codes und Mindesthaltbarkeitsdaten auf die „Smart Kamera“-Technologie von Leuze electronic gesetzt.
APA, Harvard, Vancouver, ISO, and other styles
10

RAFIEE, M., X. Q. HE, S. MAREISHI, and K. M. LIEW. "MODELING AND STRESS ANALYSIS OF SMART CNTs/FIBER/POLYMER MULTISCALE COMPOSITE PLATES." International Journal of Applied Mechanics 06, no. 03 (May 6, 2014): 1450025. http://dx.doi.org/10.1142/s1758825114500252.

Full text
Abstract:
Modeling and nonlinear stress analysis of piezolaminated CNTs/fiber/polymer composite (CNTFPC) plates under a combined mechanical and electrical loading are investigated in this study. The governing equations of the piezoelectric CNTFPC plates are derived based on first-order shear deformation plate theory (FSDT) and von Kármán geometric nonlinearity. Halpin–Tsai equations and fiber micromechanics are used in hierarchy to predict the bulk material properties of the multiscale composite. The CNTs are assumed to be uniformly distributed and randomly oriented through the epoxy resin matrix. An analytical solution is employed to determine the large deflection response and stress analysis of the nanocomposite plates. Finally, by solving some numerical examples for simply supported plates, the effects of the applied constant voltage, plate geometry, volume fraction of fibers and weight percentage of SWCNTs and MWCNTs on the deflection and stress analyses of the piezoelectric CNTs/fiber/polymer multiscale composite plate are studied. It is shown that the deflections significantly decrease with a small percentage of CNTs. Also, it is found that the SWCNTs reinforcement produces more pronounced effect on the bending and stress of the nanocomposite plates in comparison with MWCNTs.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Aktuationsverhalten von Smart Materials"

1

Ehrenhofer, Adrian, and Thomas Wallmersperger. "A normalization concept for smart material actuation by the example of hydrogels." Wiley-VCH, 2018. https://tud.qucosa.de/id/qucosa%3A74106.

Full text
Abstract:
For passive (classical) materials, stress and strain are used to extract the material behavior from the sample behavior in a tensile test. In analogy, the actuation behavior of active (smart) materials can be normalized. In the present research, we show the normalization using the example of hydrogels that react with a volume change (swelling and deswelling) when exposed to stimulus-changes like temperature, chemical concentrations, pH or light intensity changes. The normalized behavior can then be implemented with the Temperature-Expansion-Model which is based on the analogy of active behavior with thermal expansion. This allows the simulation of arbitrary active structures and the extraction of the sensitivity measure to a stimulus.
APA, Harvard, Vancouver, ISO, and other styles
2

Ritter, Axel [Verfasser]. "smart und kinetisch! : Entwerfen und Konstruieren von energie- und materieautarken kinetischen architektonischen Räumen und hydroaktiven Polymer-Aktoren unter Einsatz von Smart Materials, adaptiven und gewichtsreagiblen Konstruktionen / Axel Ritter." Aachen : Shaker, 2014. http://d-nb.info/1060623617/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Koo, Jeong-Hoi, Björn Kiefer, and Uwe Marschner. "Special Issue: ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems (SMASIS), Symposium on Modeling, Simulation and Control." Sage, 2016. https://tud.qucosa.de/id/qucosa%3A35626.

Full text
Abstract:
The ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems (SMASIS) was held from 8-10 September 2014 in Newport, Rhode Island. The scope of the Conference covers intelligent, flexible, adaptive materials and systems that respond to changes in the environment to perform in the most profitable way. Scientific strides and technological maturity in the field are linked to the interdisciplinary efforts at universities, government and industry. SMASIS aims at assembling world experts across engineering and scientific disciplines such as mechanical, aerospace, electrical, materials, and civil engineering, as well as biology, physics and chemistry, to discuss the latest findings and trends in this fruitful area of research.
APA, Harvard, Vancouver, ISO, and other styles
4

Christau, Stephanie M. E. [Verfasser], Klitzing Regine [Akademischer Betreuer] von, Jan [Akademischer Betreuer] Genzer, and Erica [Akademischer Betreuer] Wanless. "Smart hybrid materials with tailored functions : incorporation of gold nanoparticles into stimuli-responsive polymer brushes / Stephanie M. E. Christau. Gutachter: Regine von Klitzing ; Jan Genzer ; Erica Wanless. Betreuer: Regine von Klitzing." Berlin : Technische Universität Berlin, 2015. http://d-nb.info/1074912438/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Kiefer, Björn, Uwe Marschner, and S. Nima Mahoodi. "Special Issue: 2015 ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems (SMASIS), Symposium on Modeling, Simulation and Control of Adaptive Systems." Sage, 2017. https://tud.qucosa.de/id/qucosa%3A35629.

Full text
Abstract:
The 2015 ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems (SMASIS) was held from 21 to 23 September 2015, in Colorado Springs, Colorado. The scope of the conference covers intelligent, flexible, adaptive materials and systems that respond to changes in the environment to perform in the most profitable way. Scientific strides and technological maturity in the field are linked to the interdisciplinary efforts at universities, government and industry. SMASIS aims at assembling world experts across engineering and scientific disciplines such as mechanical, aerospace, electrical, materials, and civil engineering, as well as biology, physics and chemistry, to discuss the latest findings and trends in this fruitful area of research.
APA, Harvard, Vancouver, ISO, and other styles
6

Schümann, Malte. "Eine skalenübergreifende Charakterisierung der Partikelstruktur von hartmagnetischen magnetorheologischen Elastomeren." 2019. https://tud.qucosa.de/id/qucosa%3A72528.

Full text
Abstract:
Magnetorheologische Elastomere sind eine Klasse von Smart Materials, welche elastische mit magnetischen Materialeigenschaften verbindet. Die Einbettung von magnetischen Mikropartikeln in eine Elastomermatrix führt zu einem komplexen, bisher nicht vollständig verstandenen Materialverhalten. Die Beeinflussbarkeit der mechanischen Eigenschaften mittels von außen applizierten Magnetfeldern stellt die herausragende und namensgebende Eigenschaft dieser Materialien dar. Das Verständnis der mikroskopischen Anordnung und der magnetisch induzierten Bewegung der eingebetteten Partikel bildet den zentralen Schlüssel zur Ergründung der komplexen makroskopischen Materialeigenschaften. Um sich diesem Ziel zu nähern, wurden unterschiedlichste breitgefächerte Messmethoden auf mikroskopische und makroskopische Aspekte eines einzigen Probenmaterials angewendet. So entstand eine umfassende und skalenübergreifende Charakterisierung eines magnetorheologischen Elastomers. Kern der Experimente bildete die Analyse der Anordnung und der magnetisch induzierten Bewegung der eingebetteten magnetischen Mikropartikel mittels Röntgen-Mikrotomographie. Die tomographisch erhobenen Bilddaten ermöglichten sowohl eine Auswertung der Partikelstruktur auf Basis der Partikelgesamtheit, als auch auf Einzelpartikelbasis mit Hilfe eines Particle-Tracking. So konnten neue Erkenntnisse über den magnetisch induzierten Kettenbildungsprozess der Partikel gewonnen und skalenübergreifende Zusammenhänge zwischen mikroskopischen Partikelbewegungen und makroskopischen mechanischen Materialverhalten aufgezeigt werden.:Danksagung v Inhaltsverzeichnis vii Symbolverzeichnis ix Abkürzungsverzeichnis xii 1 Einleitung 1 2 Grundlagen 8 2.1 Magnetorheologische Elastomere 8 2.1.1 Elastomermatrix 8 2.1.2 Magnetische Partikel 10 2.1.3 Magnetische Eigenschaften 11 2.1.4 Partikelstruktur und mechanische Eigenschaften 19 2.2 Mikrostrukturanalyse 22 2.2.1 Röntgentomographie 23 2.2.2 Digitale Bildverarbeitung 32 2.2.3 Statistik von Partikelverteilungen 37 3 Materialien und Methoden 39 3.1 Probenmaterial 39 3.1.1 Wahl geeigneter Materialien 39 3.1.2 Probensynthese 42 3.2 Messmethoden 44 3.2.1 Messkampagnen 45 3.2.2 Mechanische Charakterisierung 49 3.2.3 Mikrostrukturanalyse 52 3.2.4 Auswertung der Bilddaten 58 3.2.5 Vibrating Sample Magnetometrie 72 3.2.6 Begleitende Messmethoden 73 4 Ergebnisse 78 4.1 Makroskopische mechanische Eigenschaften 78 4.1.1 Elastomer 78 4.1.2 Komposit 79 viii Inhaltsverzeichnis 4.2 Partikelstruktur im Ausgangszustand 83 4.2.1 Datenlage 83 4.2.2 Geometrische Charakterisierung der Partikel 86 4.2.3 Räumliche Verteilung der Partikel 89 4.3 Partikelstruktur im Magnetfeldeinfluss 90 4.3.1 Ausrichtungsverhalten der Partikel im Magnetfeld 91 4.3.2 Einbindung der Partikel in die Matrix 93 4.3.3 Statistische Verteilung der Partikelwinkel 96 4.3.4 Partikelbewegung als Reaktion auf das lokale Feld 101 4.3.5 Partikelbewegung als Reaktion auf sukzessive Magnetisierung 114 4.3.6 Paarkorrelationsfunktionen der Partikelstruktur 123 4.4 Magnetische Eigenschaften 130 5 Zusammenfassende Diskussion 135 5.1 Gewonnene Erkenntnisse 135 5.2 Gegenseitige Beeinflussung von Partikelstruktur, magnetischen und mechanischen Eigenschaften 137 5.3 Grenzen der Messgenauigkeit und Fehlerbetrachtung 137 6 Abschließende Worte und Ausblick 140 Literaturverzeichnis I Abbildungsverzeichnis XIII Tabellenverzeichnis XVII
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Aktuationsverhalten von Smart Materials"

1

Krause, Daniel, and Diana Schlebe. "Smart Materials und neue Werkstoffe für nachhaltigere Bürogebäude von übermorgen." In Green Office, 125–38. Wiesbaden: Gabler, 2010. http://dx.doi.org/10.1007/978-3-8349-8952-9_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Aktuationsverhalten von Smart Materials"

1

Michopoulos, John G. "Generalized multifield Von-Karman equations for large deflection of artificial muscle plates." In Smart Structures and Materials, edited by Dimitris C. Lagoudas. SPIE, 2004. http://dx.doi.org/10.1117/12.537624.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Pontecorvo, Michael E., Silvestro Barbarino, Farhan S. Gandhi, Scott Bland, Robert Snyder, and Jay Kudva. "Impact Load Mitigation With Bi-Stable von-Mises Trusses." In ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/smasis2013-3061.

Full text
Abstract:
This paper examines the potential of a bi-stable von-Mises truss (VMT) connected to viscous damping elements in absorbing impact loads, and reducing loads and accelerations transmitted to the base. A compact sandwich-panel-like element is designed, fabricated and tested in an impact testing machine which comprises of a top plate, a bottom plate, and VMTs in-between that stroke the dashpot as they snap through. The loads transmitted to the bottom plate showed reductions of over 70% for lower drop heights, while reductions approaching 50% were seen for larger drop heights. The introduction of pre-loaded springs in parallel to the VMTs resulted in the prototype not snapping through, except at the largest drop heights tested. The reductions in the transmitted loads were modest for small drop heights but improved as the drop heights increased and snap through occurred. Accelerations transmitted to the bottom plate also showed reductions of 83–88% relative to the upper plate accelerations. A Simscape model of the system showed good overall agreement with tests for loads transmitted to the bottom plate when using the measured loads on the top plate as an input.
APA, Harvard, Vancouver, ISO, and other styles
3

Moser, Patrick, Silvestro Barbarino, and Farhan Gandhi. "Helicopter Rotor Blade Chord Extension Morphing Using a Centrifugally Actuated von-Mises Truss." In ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-8053.

Full text
Abstract:
Previous studies have shown that chord extension morphing over a spanwise section of helicopter rotor blades can reduce main rotor power requirement in stall-dominant flight conditions while at the same time being able to increase the maximum gross weight, altitude, and flight speed capability of the aircraft. This study examines a centrifugally driven, fully passive chord morphing mechanism for helicopter rotor blades. It is based on a von-Mises truss situated aft of the leading-edge spar, connected to a rigid extension plate which deploys through a slit in the trailing-edge. When the rotor RPM increases beyond a critical value the chordwise component of centrifugal (CF) force on the von-Mises truss and plate assembly results in the deployment of the plate beyond the slit in the trailing edge, effectively increasing chord length. On reducing the RPM, a retraction spring pulls the plate back within the confines of the blade. This study presents the design process, iterations and the final design solution for a configuration that undergoes 20% chord extension. A prototype was fabricated and tested on the bench-top as well as on a rotor test stand at rotational speeds simulating 70% full-scale CF loads. The test results demonstrate that the concept works. However, effects such as friction lead to higher force (or RPM) requirements for deployment than predicted by simulation, and are present during retraction as well. The effects are more pronounced in the high CF field in the rotor test.
APA, Harvard, Vancouver, ISO, and other styles
4

Barbarino, Silvestro, Farhan S. Gandhi, and Rodolphe Visdeloup. "A Bi-Stable von-Mises Truss for Morphing Applications Actuated Using Shape Memory Alloys." In ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/smasis2013-3062.

Full text
Abstract:
The present study focuses on a bi-stable von-Mises truss (VMT), with integrated Shape Memory Alloy (SMA) wires which are resistively heated to provide the actuation force to transition the VMT from one stable equilibrium condition to the other, and back. This coupled VMT-SMA system can potentially be used in structural morphing applications. The paper considers in detail the design of the system, equilibrium between the VMT and the SMA wires, the initial pre-stress required in the two SMA wires, explains how the active (heated) SMA wire drives the VMT beyond the unstable equilibrium state, and the VMT in moving to the second stable equilibrium state pre-stresses the passive (unheated) SMA wire. The two SMA wires switch roles in moving the VMT back from the second to the first stable equilibrium state. A prototype is designed and fabricated and the transition of the VMT from one equilibrium state to the other, and back, is experimentally demonstrated. The governing differential equation representing the VMT behavior is coupled with equations representing the SMA behavior based on the Brinson thermo-mechanical model. The numerical predictions of system displacements versus temperature and time show good correlation with experimental results.
APA, Harvard, Vancouver, ISO, and other styles
5

Hahnlen, Ryan, and Marcelo Dapino. "Joining of Shape Memory NiTi to Structural Materials Using Ultrasonic Soldering." In ASME 2009 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2009. http://dx.doi.org/10.1115/smasis2009-1425.

Full text
Abstract:
Shape memory nickel-titanium (NiTi) alloys can recover up to 8% of induced strain allowing such alloys to be used in the creation of solid-state actuators. Despite the unique properties of NiTi alloys, their implementation in structural applications is expensive, complex, and in some cases unfeasible due to limitations of traditional joining techniques. This research investigates the joining of NiTi to itself, aluminum 2024, O1 tool steel, and 304 stainless steel by Ultrasonic Soldering (USS), a process that can solder difficult to wet materials without the use of flux. The USS joints were evaluated through strength testing, optical microscopy, and maximum calculated von Mises equivalent stresses developed during testing. Lap shear tests show NiTi/NiTi, NiTi/aluminum 2024, NiTi/O1 tool steel, and NiTi/304 stainless steel USS joints have average ultimate shear strengths of 30.9 MPa, 53.8 MPa, 37.2 MPa, and 40.6 MPa, respectively.
APA, Harvard, Vancouver, ISO, and other styles
6

Erturun, Ugur, and Karla Mossi. "A Feasibility Investigation on Improving Structural Integrity of Thermoelectric Modules With Varying Geometry." In ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-8247.

Full text
Abstract:
This study investigates the feasibility of improving the structural integrity of thermoelectric modules (TEMs) with varying geometry. For this purpose, six different TEM models with various thermoelectric leg geometries were designed and modeled in order to perform a thermal stress FEA using ANSYS Workbench. Temperature dependent material properties were used since some properties such as coefficients of thermal expansion change with temperature. Significant decrease in thermal stresses and leg deformations were observed with some models. Particularly, the cylindrical TE leg geometry model has approximately 54% lower Von Mises stresses (294MPa) and 13% lower TE leg deformations (3.9μm) than those of the typical TE leg geometry model (635MPa and 4.5μm). Power generation analyses of the models were performed to evaluate the effect of new TE leg geometries on the performance. TEM model with cylindrical TE leg geometry has the highest power generation (29.3mW) among all the models.
APA, Harvard, Vancouver, ISO, and other styles
7

Tummala, Yashwanth, Mary Frecker, Aimy Wissa, and James E. Hubbard. "Design of Bend-and-Sweep Compliant Mechanism for Passive Shape Change." In ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-7996.

Full text
Abstract:
Contact aided compliant mechanisms are a class of compliant mechanisms where parts of the mechanism come into contact with one another during motion. Such mechanisms can have nonlinear stiffness, cause stress-relief, or generate non-smooth paths. New contact aided compliant mechanisms called bend-and-sweep compliant mechanisms are presented in this paper. These bend-and-sweep mechanisms are made up of compliant joints which are alternately located in two orthogonal directions, and they also exhibit nonlinear stiffness in two orthogonal directions. The stiffness properties of these mechanisms, in each direction, can be tailored by varying the geometry of the compliant joints. One application of these mechanisms is in the passive wing morphing of flapping wing UAVs or ornithopters. A design study is conducted to understand the effect of hinge geometry on the deflections and maximum von Mises stress during upstroke and downstroke. It is shown that the bend-and-sweep compliant elements deflect as desired in both the bending and sweep directions.
APA, Harvard, Vancouver, ISO, and other styles
8

Hu, G. F., A. R. Damanpack, M. Bodaghi, and W. H. Liao. "Shape Adaptive Structures by 4D Printing." In ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3773.

Full text
Abstract:
This paper introduces a 4D printing method to program shape memory polymers (SMPs) during fabrication process. Fused deposition modeling is employed to program SMPs during depositing the material. This approach is implemented to fabricate complicated polymeric structures by self-bending features without need of any post-programming. Experiments are conducted to demonstrate feasibility of one-dimensional (1D)-to 2D and 2D-to-3D self-bending. It is shown that 4D printed plate structures can transform into 3D curved shell structures by simply heating. A 3D macroscopic constitutive model is developed to predict thermo-mechanical behaviors of the printed SMPs. Governing equations are also established to simulate programming mechanism during printing process and shape change of self-bending structures. In this respect, a finite element formulation is developed considering von-Kármán geometric non-linearity and solved by implementing iterative Newton-Raphson scheme. The accuracy of the computational approach is checked with experimental results. It is shown that the structural-material model is capable of replicating the main features observed in the experiments.
APA, Harvard, Vancouver, ISO, and other styles
9

Fei, Yaying, Lihua Chen, Xiaozhi Zhang, and Wei Zhang. "Study on the Snap-Through Behavior of Bistable Plates." In ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/smasis2016-9113.

Full text
Abstract:
This paper aims to analyze snap-through behavior of two-layer cross-ply bistable composite laminate square plates. The analyses consider the factors of laminate thickness, temperature and external applied force. In this study, the model was performed on the basis of the classical thin plate theory, the Von Kármán large deformation theory and Principle of Virtual Work. Afterwards the statics equilibrium equation was available. Subsequently the analysis was presented by adjusting the laminate thickness for these prior factors. Through the numerical simulations with Matlab® software, the curvatures in x-direction and y-direction were calculated to investigate the snap-through behavior. Two stable cylindrical configurations and an unstable saddle shape were given with different curvatures to show the equilibrium positions. Then the figures prove the external applied distributed force plays a vital role to the snap-through behavior. The results show that under macroscopic view, the ratio of side-length to thickness is three hundred or less, as the plates are thinner, the snap-through will appear more frequently, and the external forces will be less needed.
APA, Harvard, Vancouver, ISO, and other styles
10

Kerur, Shravankumar B., and Anup Ghosh. "Active Control of Geometrically Nonlinear Transient Response of Smart Laminated Composite Plate Integrated With AFC Actuator and PVDF Sensor." In ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2010. http://dx.doi.org/10.1115/smasis2010-3647.

Full text
Abstract:
A coupled electromechanical finite element formulation for active control of geometrically nonlinear transient response of laminated composite plate is studied. First order shear deformation theory and Von Karman type nonlinear strain displacements are used. The plate is discritised using eight noded quadratic isoparametric elements with five mechanical degrees of freedom and one electrical degree of freedom per node. Newton-Raphson iterative method in association with Newmark time integration method is used to solve the nonlinear finite element equilibrium equation. Negative velocity feedback control algorithm is used to control the dynamic response of the smart laminated composite plate. Active fiber composite (AFC) layer poled in fiber direction acting as distributed actuator and PVDF layer poled in thickness direction acting as sensor are considered. Present study involves two types of actuator sensor arrangements. Case I: the substrate is sandwiched between AFC actuator and PVDF sensor. Case II: AFC actuator and PVDF sensor are collocated on top of the substrate. The effect of piezoelectric fiber orientation in actuator layer on vibration control for both cross ply and angle ply laminates are examined.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Aktuationsverhalten von Smart Materials' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography