Suche einschränken

Ergebnisse (195)

Sortierung:

Alle Alles auswählen

Seite 4

Kein Zugriff

Auswählen

Bauingenieur

Alle Ausgaben: Bauingenieur

Bauingenieur Jahrgang 94 (2019) Heft 01 ISSN Online: 0005-6650

Treffer in den folgenden Teilen:

Viviane Adam, Matthias Hillebrand, Josef Hegger Querkraftversuche mit Gleichstreckenlast an teileingespannten Stahlbetonplattenstreifen ohne Querkraftbewehrung/Shear Tests on Partially Restrained Slab Strips without Transverse Reinforcement under Distributed Loading S. 1-8

„… basically comprises such test data. According to current standardisation, it is only allowed to omit shear …” „… . Therefore, shear tests under uniformly distributed loads were tested as part of an extensive test series at …” „… Shear Tests on Partially Restrained Slab Strips without Transverse Reinforcement under Distributed …”

Nicholas Schramm, Oliver Fischer, Wolfgang Scheufler Experimentelle Untersuchungen an vorgespannten Durchlaufträger-Teilsystemen zum Einfluss nicht mehr zugelassener Bügelformen auf die Querkrafttragfähigkeit/Experimental investigations on prestressed continuous beam subsystems to determine the influence of no longer permitted stirrup types on the shear capacity S. 9-20

„… kritischen Schubrisses und Schrägrisslasten nach [19], [20] Table 4. Test program, ultimate shear loads …” „… , Beuth Verlag, Berlin, 2012. [8] Reineck, K.-H. et al.: ACI-DAfStb databases 2015 with shear tests for …” „… calculated deficits regarding shear capacity. In practice, however, often no corresponding damage to the …”

Martin Claßen, Matthias Hillebrand, Benjamin Camps Querkraftbemessung der Stahlbetongurte im Bereich von Trägeröffnungen/Shear design of reinforced concrete beams in web opening regions S. 21-28

„… Fig. 5. Validation of the own model using shear tests from the literature; comparison with a model for …” „… 93 (2018), Heft 1, S. 37–45. [30] Herbrand, M.; Classen, M.: Shear Tests on Continuous Prestressed …” „… considerable part of the global shear force is transferred from the perforated web of the girder to the …”

doi.org/10.37544/0005-6650-2019-01

Lars Kanzenbach - Experimentell-numerische Vorgehensweise zur Entwicklung von Probekörper-Setups für die Charakterisierung technischer Elastomere

Teilzugriff

Auswählen

Lars Kanzenbach

Experimentell-numerische Vorgehensweise zur Entwicklung von Probekörper-Setups für die Charakterisierung technischer Elastomere

Reihe: Mechanik/Bruchmechanik

Band 357 2021

Treffer in den folgenden Teilen:

Titelei/Inhaltsverzeichnis

„… – specimen optimization – shear tests – shear device – homogeneous measuring zone – rubber materials …” „… shear measurements for large shear values. The design is based on a planar test specimen (rubber mat) in …” „… Tension-/compression tests, specimen-setup, specimen optimization, shear tests, shear device, homogeneous measuring …”

Grundlagen S. 5-17

„… bekanntesten Vertreter ist der zylindrische Double-Shear-Probekörper, wie er im Forschungsinstitut TARRC …” „… – Gegenüberstellung zweier Scherprobekörper (links) zylindrischer Double-Shear-Probekörper (Abbildung aus der …” „… - Shear-Probekörper bietet den großen Vorteil, dass er aufgrund seiner kompakten Struktur (geringes …”

Literatur S. 135-144

„… identified material parameters of rubber using an arcan shear test. Editura Printech, S. 79–80. Krawietz, A …” „… in dynamic tests of filled rubber. Constitutive Models for Rubber V. Hrsg. von A. Boukamel, L …” „… polymer using biaxial tension tests. Part I: Hyperelasticity. Archive of Applied Mechanics 81 (10), S …”

Entwicklung eines Scherprobekörpers für präzise Schermessungen S. 88-112

„… . pure shear) mit λ1 = λ, λ2 = 1 und λ3 = 1 λ • einfacher Scherversuch mit dem Schermaß s: λ1,2 = √ 1 + s …” „… 4.17). Um die Schervorrichtung auf ihre Funktionstauglichkeit testen zu können, wird zunächst ein …” „… mit der Elastomermatte auf ihre Reproduzierbarkeit testen zu können, wird ein Wiederholungsversuch mit …”

doi.org/10.51202/9783186357182

VDI Wissensforum GmbH - International Conference on Gears 2022

Kein Zugriff

Auswählen

VDI Wissensforum GmbH (Hrsg.)

International Conference on Gears 2022

Reihe: VDI-Berichte

Band 2389 2022

Treffer in den folgenden Teilen:

S. A. Bohme, J. Keski-Rahkonen, T. Komssi A standardizable approach to tooth flank fracture S. 371-388

„… , orthogonal shear stresses.An iteration of the Dang Van criterion is presented that focuses exclusively on …” „… spiral bevelgears. It is shown that Dang Van’s shear stress amplitude and maximum hydrostatic stress …” „… along asurface-perpendicular path can adequately be described by DNV’s orthogonal shear stress …”

A. Eric, D. Olveda, T. Froschmeier, V. Schulze Local pitting fatigue concept with EHL simulation for case hardened gears in electrical drives S. 133-144

„… adapted version of the shear stress intensity hypothesis (SIH) described in [3] as well as an approach …” „… based on the mean stress corrected shear stress amplitude in each sectional plane of a material point …” „… tests. The results from these tests are then considered to represent the local fatigue strength. However …”

B. Zhmud, M. Bengtsson, L. Everlid Improving the tribological and nhv behavior of gears by mechanochemical surface finishing S. 1365-1370

„… levels. Thus, the reduced friction shear is translated into improved power transmission efficiency …” „… resistance. Figures 3 compares the shear stress maps over the gear tooth contact area for conventionally …” „… ground and TCG-finished gears lubricated with ISO VG 150 gear oil. The shear stress calculations were …”

P. Mahendra Rao, S. Foletti, L. Bonaiti, C. Gorla, S. Beretta, F. Concli Mode III threshold under rolling contact fatigue and development of a test gearbox for planet gears S. 499-510

„… Mode III threshold under Rolling Contact Fatigue and development of a test gearbox for planet …” „… design and development of a test gearbox for the full-scale testing of such a 3-gear train planet gears …” „… mixed approach based on both, numerical simulations and experimental tests is needed. The main goal of …”

A. Kubo, M. Nagae High-speed measurement of hardness distribution with X-ray diffraction S. 1553-1568

„… we can measure e.g. the tooth flank hardness of a gear without cutting the target object into test …” „… Debye ring analysis are: 1. Residual compressive/tensile stress, 2. Residual shear stress, 3. FWHM …” „… 1557A test specimen of ca.60x60x60mm cubic block made from the central part of 260 bar of SCM420 steel …”

P. Rodel, R. Spieler, M. Indenbirken, T. Nuisl Holistic friction optimization of transmissions – a significant contribution for sustainability S. 731-744

„… locally discretized to allow the calculation of locally resolved shear stress and temperature …” „… consider inlet shear heating. Sliding friction losses: Due to relative speeds of contact surfaces sliding …” „… shear and shear stress needs to be described with a rheological model, for example using the approach by …”

K. Daubach, M. Oehler, B. Sauer Wear simulation of worm gears based on an energetic approach S. 329-342

„… frictional shear stress τf,m and mean sliding distance sg,m For all test points of the study a mean wear …” „… was taken from wear tests on the original tribological sys-tem. The tests were performed with worm …” „… and speed conditions. Within a single test, output torque and input speed were constant over the …”

F. Thurner Light into the black box: using AI software to identify unknown mechanisms of action and resolve acoustic/NVH problems – practical example of a passenger car powertrain S. 779-786

„… was for all eight gears to operate quietly in pull and shear in all speed ranges in order to pass …” „… sound on EoL test rig 2. Acoustic/NVH measurements with airborne and structure-borne sound overall …” „… test bench vs. vehicle So-called transfer functions are to be formed for selected transmissions using …”

A. Baumann, B. Bertsche Coefficient of friction behavior of gear oils and significance for the meshing process of spur gears S. 745-762

„… determined using test methods. There are standardized test methods for determining viscosity and density. The …” „… explanation of different levels of noise emissions in vehicle transmissions. For this reason, the test …” „… coefficient of friction, the less energy is required to shear the lubricating film and the lower the power …”

K. Fukanoki, K. Matsuo, Y. Suzuki, K. Fujiki Practical application of asymmetric tooth root geometry for downsizing automotive transmission gears S. 197-214

„… the results of durability tests conducted on CVT units incorporating gears that were designed and …” „… produced with the proposed methods. The test results confirmed that the tooth root breakage life of the …” „… tests on CVT units incorporating gears designed and produced using these methods. The test results …”

F. Mieth, C. Ulrich, B. Schlecht Stress calculation on bevel gears with FEM influence vectors S. 585-596

„… , a well-documented series of tests from the literature is recalculated and evaluated. VDI-Berichte …” „… reference value at the force application point. The linear deformation components due to bending, shear and …” „… curves are determined for the Tooth Root test bevel gear set F0 and hypoid gear sets F15 (15 mm Hypoid …”

B. Legrady, M. Taesch, G. Tschirschnitz, C. F. Mieth Prediction of churning losses in an industrial gear box with spiral bevel gears using the smoothed particle hydrodynamic method S. 651-664

„… are carried out at a bevel gear test rig (KRPS) of the Chair of Machine Elements at Dresden University …” „… varying filling heights. A broad range of tests for different hypoid gears, rotational speed, oils …” „… component. VDI-Berichte Nr. 2389, 20226543. Experimental SetupThe torque test bench “Kegelradprüfstand …”

S. Sklenak, J. Brimmers, C. Brecher Analysis of local wear within the dry lubricated rolling- sliding contact of coated surfaces S. 305-316

„… analogy test on the disk-on-disk tribometer. Based on the characteristics of the behavior of the …” „… mechanisms, tests with interval operation were carried out and evaluated in relation to the friction force …” „… behavior and wear. The wear analysis of the contact surface on the test shaft shows that heavy wear has …”

B. van Wissen, M. Kanters, F. Mitsuzuka, K. Iwanaga, M. Meuwissen, A. Hasanovic Predicting static and fatigue performance of fiber reinforced plastic gears S. 1083-1098

„… fiber reinforced plastic gears is obtained using dedicated gear testers and advanced finite element …” „… this complexity, one tends to perform dedicated application tests in each design phase and converge to …” „… gear-application knowhow one can combine test results obtained via VDI-Berichte Nr. 2389, 2022 1083 simplified …”

T. Arndt, J. Klose, M. Gerstenmeyer, V. Schulze Tool wear development in gear skiving process of quenched and tempered internal gears S. 1331-1344

„… single-tooth test setup. This shows the significant influence of different cooling and lubrication methods in …” „… decreases the material resistance against deformation in the shear zone. Ren et. al. showed in their …” „… conditions was determined. Therefor the use of single tooth test setups allows a process analysis to be …”

W. Kassem, M. Oehler, B. Sauer, S. Schmidt, J. Hausmann Investigation of the time-dependent behavior of plastic gears with local tribological simulation S. 1281-1294

„… 's modulus is specified as a function of temperature. For this purpose, temperature-dependent tensile tests …” „… the gears designated “C20”, the plastic PA12G was used for the experimental tests [10]. The material …” „… data are taken from data sheets [15]. Figure 2 shows graphically the tensile test data of PA12 …”

A. Zhang, J. Wei, M. Cao, B. Peng Dynamic modeling and accuracy evaluation method for complex irregular components of aviation transmission S. 573-584

„… evaluation refer to the FE model, the modal test is first carried out to verify the theoretical value of the …” „… FE method. Figure 2 shows the basic flow of modal test and data processing for a casing component …” „… . The LMS experimental test system includes an acquisition system, analysis module, a hammer (BK …”

L. Hildebrand, F. Dangl, M. Sedlmair, T. Lohner, K. Stahl CFD analysis on the oil flow of a gear stage with guide plate S. 677-694

„… with oil distributions at the corresponding test rig by means of a high-speed camera are in good …” „… single-stage FZG test gearbox as used previously by Liu et al. [24], [25]. The test gearbox has a width of 260 …” „… by Otto [37]. Figure 1 a) shows the front view on the test gearbox with the considered guide plate …”

I. Hong, Z. Teaford, A. Kahraman A comparison of gear tooth bending fatigue lives from single tooth bending and rotating gear tests S. 45-74

„… A Comparison of Gear Tooth Bending Fatigue Lives from Single Tooth Bending and Rotating Gear Tests …” „… future designs. Single Tooth Bending test (STB) or a Rotating Gear (RG) test methodologies have been …” „… used for this purpose. STB type tests generally form the large majority of gear fatigue testing due to …”

doi.org/10.51202/9783181023891

Kein Zugriff

Auswählen

Bauingenieur

Alle Ausgaben: Bauingenieur

Bauingenieur Jahrgang 95 (2020) Heft 06 ISSN Online: 0005-6650

Treffer in den folgenden Teilen:

Tobias Huber, Patrick Huber, Stephan Fasching, Markus Vill, Johann Kollegger Querkrafttragverhalten von Stahlbetonbauteilen mit aufgebogenen Bewehrungsstäben auf Basis photogrammetrischer Messungen/Shear behavior of RC components with bent-up reinforcement bars based on photogrammetric measurements S. 181-193

„… extensive test program, resulting in seventeen separate shear tests. The parameters varied in the study …” „… Table 1. Experimental parameters of the shear tests Versuchskörper BU000 BU145 BU145z BU171 BU171z BU245 …” „… . Shear test setup and instrumentation for: a) Series A and b) Series B Source: T. Huber H A U P T A U F …”

Ann-Christine von der Heid, Reiner Grebe Perforierte und vollflächige Fassadenplatten aus carbonbewehrtem Beton/Perforated and full-surface façade panels made of carbon-reinforced concrete S. 210-219

„… tensile/shear tests Source: IMB RWTH Aachen Bild 10. Versuchsaufbau der Belastungen a) Druck, b) Zug, c …” „… Darstellung und Foto des Dehnkörperversuchs Abb.: [16] [17] Fig. 4. Schematic representation and test setup …” „… of the tensile test Source: [16] [17] Tabelle 1. Materialkennwerte der verwendeten Textilien Table …”

doi.org/10.37544/0005-6650-2020-06

VDI Wissensforum GmbH - International Conference on Gears 2023

Kein Zugriff

Auswählen

VDI Wissensforum GmbH (Hrsg.)

International Conference on Gears 2023

Reihe: VDI-Berichte

Band 2422 2023

Treffer in den folgenden Teilen:

T. König, L. Cadau, L. Steidle, M. Kley, D. Cansu Güney, J. Albrecht, K. Weber A concept for comparison of new and aged lubricants in transmissions of electric vehicles and a method of oil aging on a test rig S. 1195-1206

„… a strong, sudden shear load is shown. The test is divided into three sections: (1) 0 45 s, (2) 45 …” „… method of oil aging on a test rig Ein Konzept zum Vergleich von neuen und gealterten Schmierstoffen in …” „… evaluated at different stages of aging using suitable measurement methods. A test program is designed and …”

T. Schmidt, B. Neubauer, D. Merk White Etching Cracks (WECs) on gears of E-Axle applications S. 257-268

„… -test derivates are used. However, these tests showed an unclear WEC-indication with the suspect oil due …” „… on a test rig and failed due to vibration noise after ca. 50% of lifetime, caused by six pittings …” „… surface, due to shear load on the surface. Furthermore, the subsequent material analysis shows a …”

E. Grabovic, A. Artoni, M. Gabiccini, E. Ciulli Exploration of trade-offs between NVH and efficiency in bevel gear design S. 853-880

„… constraints are prescribed. Application to a test case involving the design of a spiral bevel gearset reveals …” „… transmission ratio function based on rigid TCA assumptions. A numerical test case demonstrated that this method …” „… . However, it should be noted that the presented optimization test case is somewhat questionable, as the …”

B. Černe, N. Vukašinović, D. Zorko In-situ experimental methods for measuring tooth meshing displacements and wear during polymer gear tests using a high-speed camera with microscopy optics S. 1563-1580

„… tests using a high-speed camera with microscopy optics B. erne, N. Vukašinovi , D. Zorko, Faculty of …” „… processes taking place during a gear test. Using these methods is possible to assess the displacements and …” „… profile at any point during a gear test and obtain a comprehensive time-dependent wear progression …”

T. Tra My Truong, S. Schumann, B. Schlecht On the Testing of Flank Fracture Calculations Based on 3D-Gears S. 243-256

„… appearance of flank factures. In order to avoid the failure of experimental tests, the gear design process is …” „… . 2422, 2023 243those parameters is compared to the stress using the shear stress intensity hypothesis …” „… fracture mechanism the shear stress intensity hypothesis has proven itself to be the most suitable method …”

G. Vasileiou, C. Vakouftsis, C. Kalligeros, V. Spitas, C. Papalexis, A. Tsolakis, P. Zalimidis Continuous prestressed reinforcement of plastic gear teeth and its effect on bending strength vs conventional reinforcement S. 1375-1388

„… point following a path normal to the maximum shear stress isolines until tooth breakage. The coordinates …” „… 0.453 Poisson’s ratio XZ 0.253 Shear modulus XY 3.59 GPa Shear modulus YZ 3.39 GPa Shear modulus …” „… test specimens as well as the effect of the gear rim that is not taken into account in their …”

J. Gründer, A. Monz Analytical Method for Calculating the Nominal Tooth Root Stress in Worm Gear Shafts S. 1091-1110

„… approach for calculating bending, compression, and shear stresses in the tooth root of worm shafts to close …” „… considered. 𝜎𝐹∙ 𝑚∙ ∙ ∙ ∙ ∙ (2) When designing worm wheels according to DIN 3996 [1], the maximum shear …” „… stress F is compared with the shear stress limit FG from which a safety factor SF is calculated. This …”

L.-C. Chang, Q. Y. Zhuang, S.-J. Tsai, J.-F. Hochrein, S. Landler, M. Otto, K. Stahl Comparing the contact characteristics of involute gear/ eccentric cycloidal gear calculated by various loaded tooth contact analysis models S. 397-412

„… pressure and shear stress. The aim of this paper is to apply an example of involute gears to two different …” „… , shear wS and compression wN deformation, show in Eq. (11-13). The tooth is considered as a cantilever …” „… , including contact deformation wH,k, bending deformation wB,k and shear deformation wS,k at discrete point k …”

U. Cihak-Bayr, T. Wopelka, C. Wintersteiger Effect of LOL conditions under high velocity and high injection temperatures S. 763-778

„… on a twin-disc test-rig Dr. Ulrike Cihak-Bayr, Dr. Thomas Wopelka, Dr. Christoph Wintersteiger, AC …” „… been performed on a twin-disc test rig to study the limits of stable friction condition at high …” „… permanent lubricant shut-off. A twin-disc test rig, specially designed to meet the requirements of such LOL …”

J. Lövenich, M. Zalfen, D. Mevissen, J. Brimmers, C. Brecher Crack growth based tooth root life prediction model – an influence quantity analysis S. 109-124

„… rig tests up to the VHCF range. Introduction and MotivationDue to mandatory weight optimization in …” „… standard specimens [14]. A high-speed stress test rig was set up in a EU clean aviation project to …” „… for the lifetime prediction model. These are determined in the Compact Tension (CT) test. The greatest …”

M. Reichl, P. Lenz, A. Oliva Challenges and possibilities of virtual development of e-axle transmissions S. 485-498

„… increasing. The number of prototypes must be reduced, since test bench times are expensive and limited …” „… pressure differences when the gears are immersed in the oil bath and from shear stresses between the gear …” „… (splashing, squeezing and ventilation) in the test gear of the Gear Research Center (FZG) at the Technical …”

A. Kubo, M. Nagae Estimation of brittleness of CCH-steel via measurement of micro-VH and simultaneous FWHM distribution S. 1699-1712

„… uorescent magnetic powder test indicates many cracks initiate there and the tooth ank must be very …” „… Nr. 2422, 20231706ank. The residual shear-stress distribu-tion under the damaged point path- looks …” „… . tensile stress of and damaged toothankFig. esidual shear-stress of and damaged tooth ankVDI-Berichte …”

M. J. Herberger, F. Rudolph, B. Sievers Efficient concepts for high ratio angular gearboxes S. 801-814

„… efficiencies, an electrically braced test bench is used. Torque measuring equipment on the input and the output …” „… . Fig-ure 4 shows this test setup consisting of test gearbox and input shaft assembly. Equation 1 is also …” „… applicable for the input shaft assembly. Fig. 4: Test setup consisting of test gearbox and input shaft …”

C. van Oss, A. Hilbig, H. Sardemann, S. Schumann, B. Schlecht Opportunities arising from digital twins in gear development S. 1027-1038

„… parameters for affinity and shear , according to Brown [3]. In order to now establish correspondences …” „… measurement images (simultaneous calibration) or is determined separately beforehand (test field calibration …” „… hypothesis can be confirmed by tests on real gear sets. The gear sets used in the tests have a linear contact …”

R. Beilicke, D. Bartel, L. Bobach Simulation-based optimization of gearing efficiency using thin coatings S. 975-984

„… solution. A good match between lubricant and coating is important here. Tests or thermo-elastohydrodynamic …” „… gear pair considering limiting shear stress behavior of the lubricant. Tribology International 97 (2016 …”

P. Romio Spur Gear Teeth Reconstruction via Direct Laser Deposition S. 1641-1664

„… Basismaterial und dem Masseverlust während der Tests aufgetreten sind. Abstract Fatigue damage, such as …” „… teeth against base material, and mass loss during the tests. 1. Introduction International Standard ISO …” „… fatigue fracture); (3) Non-fatigue fracture (e.g., tooth root rupture and tooth shear fracture); (4 …”

M. Geitner, S. Preintner, T. Tobie, K. Stahl Simulation Study on the Tribological Characteristics in the Meshing Contact in the Context of the Load Carrying Capacity Calculation of Internal Gears with Unbalanced Sliding Conditions S. 429-450

„… all gear geometries are designed to be also tested experimentally within the FZG internal gear test …” „… Conditions for Simulation The load stage test according to [20] (based on the micropitting test according to …” „… hard/hard considered). Here, values of the Hertzian pressure at the pitch point C are specified in the test …”

W. Kassem, J. Müller, M. Oehler, O. Koch Analytical tooth root stress calculation for short fiberreinforced plastic gears S. 1361-1374

„… constants , , , , , , , , . Here, is the Young's modulus, the Poisson's ratio and the shear modulus …” „… constants can be reduced to five with , , and . Extensive tensile tests were carried out on PA46GF30 in the …”

doi.org/10.51202/9783181024225

1 ... 3

4

5 ... 39