Filter results

Results (330)

Sort by:

Select all Select all

Page 5

Berit Müller - Near-net-shape fabrication of open-porous bone replacement materials of calcium phosphate and protein

Partial access

Select

Berit Müller

Near-net-shape fabrication of open-porous bone replacement materials of calcium phosphate and protein

Series: Biotechnik/Medizintechnik

Volume 294 2017

Results in this title

RESULTS S. 39-63

„… and β-TCP show a similar increase at a pH value below 6. At a pH value above 6 the Ca2+-solubility of …” „… reached at pH 5.1-5.2 for both calcium phosphate powders, for HAp at an added protein amount of 400 ng/cm …” „… added protein to the suspension whereas the y-axis shows the amount of protein that adsorbed after 16 …”

DISCUSSION S. 64-75

„… highest protein adsorption (at 800 ng/cm² of added protein) was detected for β-TCP and LSZ. The achieved …” „… value of 171 ± 39 ng/cm² corresponds within the error bar to the calculated regular side-on monolayer …” „… (Figure 5-2b), in addition, the adsorption pH changes from 7.0 to 6.1 with increasing amount of added …”

doi.org/10.51202/9783186294173

VDI Wissensforum GmbH - International Conference on Gears 2023

No access

Select

VDI Wissensforum GmbH (ed.)

International Conference on Gears 2023

Series: VDI-Berichte

Volume 2422 2023

Results in this title

B. Karba, N. Yildirim Backlash optimization via compatible gear couples on the assembly lines for planetary gearboxes S. 1147-1158

„… added to (excel) sheets of different runouts, tooth thicknesses under span measurement/over two balls …” „… rotation VDI-Berichte Nr. 2422, 20231148to reveal value of backlash range using quality reports of …” „… . Optimization methodology The actual value and effects of the backlash which is critical in the mesh condition …”

D. Gallagher, E. Wiita, R. Weidig Improved Method for Validation of Root Stress in Polymer Gears S. 1333-1350

„… ; and then to compare this calculated value to a permissible stress limit FP for that polymer, at the …” „… 6336-3:2019 [10] and DIN 3990-3:1987 [6]. The new variable f (Load Distribution Influence Factor) was added …” „… value for F when using ISO 6336-3:2019 compared with DIN 3990-3:1987. Therefore, in this regard the two …”

W. Smet Gear geometry, size and material influences not captured in ISO 6336 S. 1267-1272

„… has certainly, proven its added value. Currently steps are being taken to improve torque density on …” „… surface-initiated failure modes). The application of ISO 6336-5 [5] has proven its value and has made it possible to …”

A. I. Aydeniz Modelling and Analysis of the Effect of Root Modification on Load Sharing and Stress Values on Spur Gears S. 1039-1062

„… region of the gear profile, first the application limits were investigated and added to the model …” „… ( ) and angle 𝛼 (Figure 1.) have been investigated as a starting point and the parameters are added to …” „… base circle pitch is to be subtracted from this value, the location of point 𝑨 (distance (𝑇 𝐴) on …”

J. D. M. Marafona, J. H. O. Seabra, P. M. T. Marques, R. C. Martins Effect of overlap ratio on gear dynamic behavior and noise level S. 1239-1256

„… mean roughness value 0.35 root/ µm mean peak-to-valley roughness (root) 20 /µm mean peak-to-valley …” „… obtained so an extra number corresponding to the overlap ratio was added to their names. These are very …” „… can easily be added to the accessible test rig. Thus, a nominal torque of 𝑇 = 200 Nm is selected for …”

A. Alnahlaui, P. Tenberge Optimised statistical evaluation for the determination of tooth root endurance strength S. 19-32

„… previously generated 𝑋 values are multiplied by the standard deviation and added to the mean value, as …” „… disrupted along a range of strength levels, for each failure probability a strength value is recorded. By …” „… the distribution of the tooth root strength. Where the mean value and standard deviation of the …”

L. Becker, P. Tenberge Crossed helical gears – simulative studies and experimental results on non-involute geometries S. 1499-1514

„… ) in case of a positive value (also negative values for a convex circular contour are possible, but …” „… in case of the ZC geometry, the parameters of the grinding disc are added (q2). With the help of the …” „… of the value u, like the points on the tooth flank before. To calculate the flank pressure …”

U. Kissling Impact of manufacturing deviations on the NVH behavior of modern gear design concepts S. 367-382

„… performed, a table was added to the "Manufacturing" tab in KISSsoft [2], in which the user can enter …” „… manufacturing"Value", μm Amplitude *2 Amplitude *2 Amplitude *2 "Factor 1" Sinus wave length in module (roll length …” „… ) Waviness helix angle βwellFormula used 1) 2) 3) 1) Δfα = value/2* [1 – Sin(2*π (0.25 - Factor2/Factor1 …”

A. Baseer, B. Bauer, C. Wang Mesh Load Factor in Multiple Planetary Stage Gearboxes S. 281-290

„… other hand. Furthermore, the number of planets influences the value of mesh load factor: the more …” „… planet pin force over the time for 6 planets After the simulation the K value can be calculated with the …” „… of K of +2.1%. If the NTL are added, this leads to an increase of +4.2% in M3 and even up to +7.8 …”

K. Moser, S. Körber Advanced biopolymer compounds for technical applications S. 1297-1300

„… PLLA and PDLA were mixed in ratio 1:1 and a specific amount of NAs was added. The premix was compounded …” „… shows the weakest heat deflection temperature with an HDT-B value of approx. 55 °C. The sc-crystalline …”

I. Gonzalez-Perez, A. Fuentes-Aznar, J. Calvo-Irisarri, N. Bilbao-Handley, X. Lopez-Fuentes, A. Fernandez-Sison Evaluation of the effect of the rim thickness on the root stress cycle of helical planet gears with integrated rollers S. 553-568

„… value for a rim thickness about three times the module. 1. Introduction The effect of the rim thickness …” „… Kapelevich [16]. However, important simplifications were considered in these studies: an infinite value of …” „… deviations are added through linear and parabolic functions that provide profile and line flank modifications …”

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

„… iteration, the actual contact pattern position is the target value, as the corresponding relative position …” „… added to the previously existing relative position deviations . In the first iteration it applies that …” „… iterated centroid becomes minimal and adheres to a defined limit value, the iteration target is reached …”

J. Sanchez-Espiga, A. Diez-Ibarbia, M. Iglesias, A. Fernandez-del-Rincon, F. Viadero, J. Calvo-Irisarri, A. Fernandez-Sison Statistical study of the mesh load factor of planetary gear transmissions affected by inherent manufacturing errors S. 139-156

„… ]. This sets the threshold value of the mesh load factor (K ) in order to certify a transmission of a wind …” „… ] proving the value of these methods. On these grounds, this work proposes the analysis of the influence of …” „… ideal value also calculated analytically. In order to model this error those values mentioned are not …”

J. Cathelin Plastic Gears: Investigation on Noise and NVH Behavior S. 1449-1460

„… deformation of the contact surfaces added to the kinematic error when empty. 𝑇 𝑛𝑠𝑚𝑖𝑠𝑠𝑖 𝑛 . 12 …” „… : Geometric parameters for the VDI 2736 size 1 – gear geometry [2] Parameter Nomenclature Unit Value …” „… all gears was the tip diameter, which needed to be within the specified tolerance value 40.402 .. mm …”

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

„… , the fracture mechanics parameters, such as book toughness KIC, threshold value of the stress intensity …” „… stress state, with the local material strength, i.e. the threshold value of the crack initiation Kth. The …” „… stress is described by the stress intensity factor KI and the material strength by the threshold value of …”

T. Jagiella, S. Haller, J. Lechner, T. Rung, M. Wöppermann, B. Zeeb Building a software toolchain for automated mass-customization of specific end-use gear unit parts using AM-driven design guidelines S. 1607-1616

„… dental crowns, due to small form factors and high part value.Cost-effective production of lower value …” „… design process and added benefit for the customer outweigh the higher cost of additive manufacturing …” „… , thereby making AM production of lower-value parts (compared to typical metal AM parts) economical. An …”

S. Moschkau, S. Held Optimization of product quality and manufacturing processes in real-time with vibration analysis S. 1821-1828

„… cylindrical grinding of different parts among other things. Particularly in honing, high added value has been …” „… dynamic processes, on the basis of fixed orders. In case VDI-Berichte Nr. 2422, 2023 1825of a limit value …”

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

„… added. The variant [C: BECAL] calculates a conservative efficiency for this high ratio. The mean value …” „… input or motor side. The gearbox has a bearing concept as described in chapter 4.2. The value of 100 …” „… = 1500 min-1. In each diagram the shown values are standardized to a maximum efficiency value. As …”

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

„… of the material utilisation The material utilisation is a value that puts the equivalent stress into …” „… depth higher values are reached since the tensile residual stress is added to the stress caused by …” „… shrink by increasing the value of 𝐴 to which the feature would be applied. The last or rather smallest …”

G. Devaraj Vibration reduction of planetary gear drive using mesh phasing: modelling and experimental validation S. 157-174

„… . Extending the validation process can be an overkill where efforts/budget are used without any added value to …” „… important as shown in [3]. It was noted that by setting a meshing phase value optimized for a certain …” „… , clearances, bushing stiffnesses, output polar inertia value and damping). Fig. 15: Order cut of the planetary …”

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

„… , and several additives added to the base fluid [9]. The composition of bio based lubricants is subject …” „… describes the numerical value of the kinematic viscosity, m the directional factor/gradient, T the …” „… the VI value of the corresponding oil. Here the two lines VDI-Berichte Nr. 2422, 2023 1199are parallel …”

K. Lübke, K. Stein Quality inspection of special geometries measured with computed tomography – Evaluation of involute cylindrical gears according to ISO 1328-1 S. 1787-1802

„… value of the gearing itself. Further evaluations include e.g. tooth thickness/space width, too. Fig. 1 …” „… or sections for evaluation afterwards. Other holistic evaluations might be added in the future for …” „… results to the cmm results for the profile values two gears with 12 teeth two gears with 43 teeth value …”

A. Yavuz Kanyilmaz, B. Karba, M. VARDAR Classifying plastic beveloid gear quality considering manufacturing errors S. 1159-1172

„… already been added as mentioned in the literature [9], but if this value is more or less than desired, it …” „… changes from a negative value to a positive. Undercutting and zero top land should be checked in beveloid …”

A. F. İnceel, B. Özkan, B. Karba, M. Vardar A study on the efficiency prediction of a gear bearing drive by means of mathematical modelling S. 1135-1146

„… external gears is described in Reference [11]. Windage losses have been added to the Terekhov model and are …” „… inspected about efficiency of GBD. Hence, it is observed that the estimated efficiency value is evaluated at …”

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

„… this calculation step serves as a starting value for the following calculation of an isothermal EHL …” „… calculation show a fairly good comparability. However, it is to be added in this context that the target of …” „… value of the lubricant film thickness. Rather, the micropitting load capacity is determined based on …”

I. Hong, D. Talbot Tooth Bending Strain Rate Analysis in a Counter Shaft Drivetrain and Implications on Fatigue Strength S. 53-66

„… and carbon are added at temperatures (~560-580oC) below the austenitic range and only done on ferritic …” „… the value and potential consequences of considering strain rate in the fatigue and strength properties …”

M. Vivet, A. Rezayat, J. Verhoogen, K. Kucukcoskun, S. Donders Numerical analysis of bevel gear transmission acoustic emission using a 3D gear contact force model within a multibody system dynamics simulation environment S. 689-702

„… spiral bevel gear elements. The missing local contact deformation component is added during the dynamic …” „… (P-t-P TE), which is computed by removing the mean value from the TE signal to simplify comparison …”

F. Concli, M. N. Mastrone Latest advancements in the lubrication simulations of geared systems: a technology ready for industrial applications S. 499-518

„… the Coriolis and centripetal accelerations are added to the momentum equation 4. This approach is …” „… achieved. This change of state has the effect of limiting the minimum value of pressure. By doing this, the …” „… limiting the minimum pressure on the rear flank to the vaporization value, the suction contribution to the …”

M. Gebhardt, A. Rhode, B. Legrady Lubrication improvement at the HS-IS spline shaft interface of a wind turbine gearbox using the smooth particle hydrodynamic method S. 519-536

„… oil being added to the interface and after less than 1 s oil starts to leak out to the rotor side …” „… is only slowly penetrated by oil. This result is aggravated when either the RPM value or the …”

A. Drechsel, J. Pellkofer, K. Stahl Transferability of the scuffing load capacity of gear oils determined on spur gears to hypoid gears S. 881-896

„… ) are therefore added to the oil. When the additives are activated by appropriate contact temperatures …” „… hypoid scuffing test method. Due to the difference in the absolute value of the friction coefficient for …” „… of tests smaller than 10, only a rough estimation of the mean value of the failure load stage is …”

doi.org/10.51202/9783181024225

No access

Select

wt Werkstattstechnik online

Browse Volumes: wt Werkstattstechnik online

wt Volume 108 (2018) Issue 06 ISSN Online: 1436-4980

Results in this title

O. Todorovic, C. Constantinescu Netzwerkplanung von Industriellen Produkt-Service-Systemen*/Network Planning of Industrial Product Service Systems – Challenges in Network Planning: A case study in the machine building sector S. 387-392

„… IPSS, especially their value-added networks, new planning tools are needed. This article presents a …” „… planning tool for creating value-added networks for IPSS. treffen. Der notwendige Prozess der Veränderung …” „… set up IPSS, especially their value-added networks, new planning tools are needed. This article …”

doi.org/10.37544/1436-4980-2018-06

VDI Wissensforum GmbH - International Conference on Gears 2019

Partial access

Select

VDI Wissensforum GmbH (ed.)

International Conference on Gears 2019

Series: VDI-Berichte

Volume 2355 2019

Results in this title

P. Barreiro, J. Hoffmeister, J. Hermes, A. Bronner New improvement opportunities through applying topology optimization combined with 3D printing to the construction of gearbox housings S. 1823-1834

„… with added value [15]. Concerning the VDI-Berichte Nr. 2355, 20191824 necessary added value, the …” „… VDI-Berichte Nr. 2355, 20191832 corroborate the added value of applied additive manufacturing in gearboxes. The …” „… between 10% ≤ m ≤ 15% of the optimization volume. A higher value led to an oversized structure. Smaller …”

C. Chevrel-Fraux, R. Fargere, J. Bruyere, P. Velex Modelling of high power geared transmissions, introduction of a filling material S. 903-914

„… lumped parameters elements which connect master nodes to a central nodal mass. The effect of added mass …” „… inequality is not respected, the frictional element is slipping and the value of needs to be recomputed …” „… , the inequality 3 becomes an equality and -value can be obtained using the following formula …”

M. Pillarz, A. von Freyberg, A. Fischer Multisensory measurement of the base circle radius as a fundamental shape parameter of large gears S. 1207-1214

„… with a tactile measurement. The measured base circle radii are in agreement with the reference value …” „… geometry of the gear and plumb line distances , are added to the nominal points [10]. To calculate a base …” „… on various sensor uncertainties . The sensor uncertainty is increased stepwise and added to the …”

M. Raabe Consideration of elastic deformations of gear bodies using a reduction on a fourier series S. 797-808

„… ) based on integrated Legendre-polynomials [4] are added for the axial position, see figure 2. These have …” „… stiffening by the gear. And it also has the smallest line load. The asymmetric case 3 has a similar value …” „… line load decreases with the helix angle, but the maximum value increases. This is because of the …”

J. Lohmiller, J. Hoffmeister, J. Hermes Conventional high-strength nodular graphite iron as a substitute for austempered ductile iron (ADI) S. 877-892

„… GJS Std P102 Output shaft 372 300 P102-B* GJS Sn* P102 Bearing seat 492 420 (* 0.06% Sn was added …” „… % P102-B* 492 721 / 779 414 / 478 2.5% / 3.2% * 0.06% Sn was added Figure 3 displays the mean …” „… FKM guideline [9]. For larger diameters, the VDI-Berichte Nr. 2355, 2019882 dashed line is added …”

J. Brimmers, M. Willecke, C. Lopenhaus, C. Brecher Investigation of the potential of using surrogate models in the gear design process S. 727-740

„… (MARS). Fig. 1: Overview of different surrogate modeling types RBF are functions whose value only …” „… consists of two parts. The first part being the forward-phase, where new basis splines are added in order …” „… used to minimize the approximated objective value with optimization techniques (e.g. gradient-based …”

L. Stocco Complementary strengths of orbitless & planetary drives S. 1485-1496

„… . Fig. 1: Planetary & Orbitless Pitch Velocity In Fig. 1, The Planetary curve has both a higher value …” „… , the ring gear is erased, an offset bore is added to each planet, and an offset carrier is added and …” „… with ceramic offset shafts pressed in for added strength. Plain bearings are pressed into a 2-sided …”

E. Lothman, L. Kamjou, E. Claesson Gear performance beyond current standards – Implementing increased material fatigue performance in gears S. 915-924

„… using material cleanliness as a solution when other processes have already been added and optimized. It …” „… steels and the increase seems to be higher with added after treatments and increased gear quality …” „… . VDI-Berichte Nr. 2355, 2019922 Fig. 2: Illustration of cost and value creation To get an indication of …”

J. Thomas, C. Gosselin, P. Eng Design and rating by means of loaded TCA of straight bevel differential gears S. 493-504

„… available yet, but can be added to HyGEARS easily later on. 4. Reverse Engineering [1] Reverse …” „… and two ring gears, this means a total axle torque of 6000 Nm, which is a rather usual value for such …” „… 3.82 x σH,lim is obtained for 1 cycle. Taking a typical value according to ISO 6336-5 [4] of σH,lim …”

A. Pogačnik, U. Kissling Layout of profile modifications for symmetric and asymmetric plastic gears S. 1461-1472

„… transmission error. When optimizing in terms of noise, the max-min value of the transmission error (PPTE …” „… . Solution nr. 1 2 3 4 5 6 7 8 9 10 11 Tip relief gear 1 Value, µm Length factor …” „… Value, µm Length factor / / / Arc 10 1 Arc 20 1 Arc 30 1 / / / / / / / / / Arc 10 1 …”

H.-J. Dennig, S. Monn, A. Vodermayer Thermoplastic high performance composite gears S. 1279-1290

„… temperature of the material at the teeth is exceeded; more heat is added than dissipated. The tooth …” „… heat is added than dissipated. The tooth temperature rises steadily. Due to the temperature increase …” „… value . A significant increase in the load-bearing capacity compared to dry-running operation can be …”

K. Lubke Virtual gauge for splined shaft-hub joints – Quality inspection and assembly of involute splines in the context of Industry 4.0 S. 1497-1508

„… function-oriented inspection is not a value, but a qualitative statement for the pairing of two parts. Mechanical …” „… involute flank geometry, which can be offset by a constant value. Therefore, the tooth thickness of the …” „… result in a quantitative value of the effective tooth thickness/space width. Additionally, the manual …”

Z. Zhan, H. Liu, C. Xiang, Q. Yan, H. Li, W. Wei, L. Xu Study of lateral and torsional vibration distribution of two-stage planetary gears based on vibration energy theory S. 1245-1252

„… mechanism for nonlinear planetary gears system, which has significant academic and engineering value. 1 …” „… vibration energy is a scalar quantity, so it can be directly added and compared without considering phase …”

T. Kleiber DIN Q6 meets DIN Q10 – Need for modern internal gear production S. 415-424

„… inspection methods then can be used to prevent added-value in case of insufficient NVH quality. Schaeffler is …”

M. Zapf, J. Klose, F. Zanger, V. Schulze Analysis of process forces and surface topography when manufacturing case-hardened gears by double flanked hard skiving S. 1647-1658

„… mean of the maximum forces of all windows is taken. The resulting force value is the averaged maximum …” „… workpiece. Force vectors in the x-y-plane are added, see Figure 3. The amplitude of tooth impact and the …” „… roughness varies by less than 0.1 for repeated measurements. The roughness value Ra could well be …”

K. S. Ivanov, E. K. Yaroslavtseva Creation of gear self-controlled variator S. 1135-1144

„… prescribed limits real constraint should be added. However this constraint should preserve the mobility of …” „… 0KM M P . (7) Let's substitute value kP in …”

N. C. Ecke, A. K. Schlarb, J. Holler, Jan Niedermeyer, P. Klein Thermal simulation of anisotropic PEEK-based tribocomposites S. 1411-1420

„… the fibers, a modification of the orientational parameter A was used. The value of A in a direction x …” „… particles of PEEK-2 were added in a second step. The volume element was then divided into voxels and …”

M. Chapron, Q. Theurillat-Bonjour Tooth contact analysis of non-circular gears with non-involute tooth profiles: Application to horological spur gears S. 925-936

„… curves are shown in Figure 9b. Once the primitive curves are computed, teeth can be added in order to …” „… with an average value of 4.86 Nmm, which is slightly under the objective one, mostly due to the …”

doi.org/10.51202/9783181023556

Partial access

Select

VDI Wissensforum GmbH (ed.)

Autoreg 2019

Series: VDI-Berichte

Volume 2349 2019

Results in this title

Y. Jia, U. Schwarz, D. Görges Energy-Optimal Adaptive Cruise Control based on Model Predictive Control in the Real Driving Emissions Test Cycle S. 145-158

„… added constraints, the optimal value of the cost function is named V . If V is smaller than V , the …” „… towards the area in which the traction force is zero, an additional constraint 0, 0 is added so that the …” „… measurement point of the power consumption , . With (5b), the value of is decided by the distance between …”

K. Figel, F. Svaricek, M. Schultalbers Review and experimental evaluation of models for drivability simulation with focus on tire modeling Short Version S. 293-312

„… . 2 Symbols ∗̇ Derivative with respect to time ∗̂ Estimated value ∗ Normalized value ∗̃ Physical …” „… parameter value ∗0.5 Median of a value α Average road elevation αt Tire model parameter βt Tire model …” „… arms Root mean squared value of acceleration ax Longitudinal acceleration b Backlash angle bfit Fit of …”

D. Augustin, J. Schucker, J. Tschirner, M. Hofmann, U. Konigorski A Simulation-Based Reinforcement Learning Approach for Long-Term Maneuver Planning in Highway Traffic Scenarios S. 47-60

„… known as Q-learning. In order to support interpretability, the action-value function is approximated …” „… which the state-action value function is approximated via a growing decision tree. The latter uses a …” „… definition limits of the prototype trajectory the last value of the trajectory is held. When evaluating lane …”

G. Nareyko, T. Koch, A. Trächtler Model Predictive Control of an Active Roll Stabilization System S. 245-256

„… transmission value and , as a stiffness at the axle which stands for front/rear axle, respectively. For the …” „… equation (5), a transition band with a slope was added between torque and rotational speed limits. The …”

doi.org/10.51202/9783181023495

1 ... 3 4

5

... 66