Дисертації з теми "Multiaxial fatigue analysis"

Thesis (M.S.)--University of Nevada, Reno, 2006.
"August, 2006." Includes bibliographical references (leaves 38-45). Library also has microfilm. Ann Arbor, Mich. : ProQuest Information and Learning Company, [2006]. 1 microfilm reel ; 35 mm. Online version available on the World Wide Web.

An integrated procedure, combining finite element modeling and fatigue analysis methods, is developed and applied to the fatigue optimization of a notched, induction hardened, steel shaft subjected to combined bending and torsional loading. Finite element analysis is used first to develop unit-load factors for generating stress-time histories, and then, employing thermo-elastic techniques, to determine the residual stresses resulting from induction hardening. These stress fields are combined using elastic superposition, and incorporated in a fatigue analysis procedure to predict failure location and lifetime. Through systematic variation of geometry, processing, and loading parameters, performance surfaces are generated from which optimum case depths for maximizing shaft fatigue performance are determined. General implications of such procedures to the product development process are discussed.

Master of Science

Grande parte dos componentes mecânicos e estruturas são solicitados por carregamentos que variam com o tempo e frequentemente falham por fadiga. Neste sentido, é indubitável que o modo de falha por fadiga seja considerado no projeto mecânico de componentes, equipamentos e estruturas sujeitas a carregamentos cíclicos. Os livros de projetos de máquinas ainda são os mais utilizados na indústria como referência teórica e prática ao dimensionamento contra a fadiga de produtos. Entretanto, muitos deles ainda não incluem as últimas descobertas e metodologias mais modernas para o cálculo de durabilidade de estruturas. Adicionalmente, de uma maneira geral, grande parte dos livros especializados em fadiga também não trazem informações detalhadas sobre a previsão de vida em fadiga sob a ótica do projeto mecânico, como a análise utilizando critérios de Fadiga Multiaxial e a análise de fadiga baseada em Elementos Finitos (FE-Based Fatigue Analysis). Baseado neste cenário, este trabalho tem o objetivo de propor um procedimento para avaliar a vida em fadiga de componentes e estruturas reunindo os métodos mais recentes utilizados nesta área. Dentre os vários assuntos incluídos no procedimento proposto, destacam-se: as importantes contribuições propostas pelo Conselho Alemão de Pesquisa em Engenharia (FKM-Guideline); a utilização de Análise por Elementos Finitos (FEA) na previsão de vida em fadiga; o cálculo do fator de tensão média utilizando pseudo tensões provenientes de FEA; a contabilização do efeito de entalhe em componentes com geometria complexa utilizando o Método do Gradiente de Tensão Relativo em conjunto com FEA, que pode ser aplicado tanto em carregamento uniaxial quanto em carregamento multiaxial; a contabilização do dano por fadiga em carregamento multiaxial de amplitude variável; a densidade da malha de elementos finitos adequada para utilizar em fadiga computacional; e a aplicação da teoria e dos critérios de Fadiga Multiaxial, principalmente em FE-Based Fatigue Analyses, cuja utilização é imprescindível em estruturas sujeitas a tensões cíclicas em mais de uma direção (x,y,z).
Most of mechanical components and structures are subjected to time varying loading and therefore often present fatigue failure. Therefore, it is essential to consider the fatigue failure mode in the project of components, machines and structures under cyclic loading. Design of Machine Elements books are still the most used in industry as theoretical and practical reference for designing products against fatigue. However, many of them still do not include the latest findings and methodologies used in fatigue life assessment of structures. Additionally, overall, most of the specialized fatigue books also do not include detailed information about fatigue life assessment in a mechanical project view, as the fatigue analysis using Multiaxial Fatigue criteria and the fatigue life prediction using the Finite Element Method (FE-Based Fatigue Analysis). Based on this fact, this thesis proposes a procedure for predicting component and structures fatigue life, gathering together the most recent methods used in the fatigue area. Among the several subjects included in this procedure, we can highlight: the important contributions of the German Engineering Research Council (FKM-Guideline); the use of Finite Element Analysis (FEA) in the fatigue life assessment; the calculation of the mean stress factor using the pseudo stresses from FEA; the computation of the notch eect in geometrically complex components using the Relative Stress Gradient Method in conjunction with FEA, method which can be applied both in uniaxial loading and multiaxial loading; the estimation of the fatigue damage in structures under variable amplitude multiaxial fatigue loading; the selection of an adequate Finite Element mesh density to use in computational fatigue; and the aplication of the Multiaxial Fatigue theory and criteria, specially in FE-Based Fatigue Analyses, of which use is essential in structures under ciclic stresses in 2 or 3 directions (x,y,z).

Depuis le XXème siècle, le développement continu des puissances de calcul a permis aux méthodes numériques de devenir essentielles dans le processus de conception des produits industriels. La méthode de calcul par éléments finis apporte aux industriels des solutions fiables pour anticiper avec précision la tenue mécanique des composants sans recourir aux prototypages réels. La tendance actuelle d’optimisation des coûts de fabrication impacte directement la conception des produits avec notamment comme axe de travail la réduction des épaisseurs de matière. Dans ce contexte, les pièces de structures sont moins robustes qu’avant. La maitrise de la tenue en fatigue des composants est devenue aujourd’hui un enjeu majeur. Ce phénomène complexe se montre sensible à l’histoire vécu par la matière, notamment en ce qui concerne les potentiels impacts sur les propriétés matériaux locales des différents procédés de fabrication intrinsèques au composant. Le procédé de soudage induit des conséquences à plusieurs niveaux de l’assemblage qui peuvent s’avérer être néfastes pour la durée de vie des structures. Ces phénomènes multi-physiques d’origine thermique, métallurgique et mécanique doivent alors être pris en compte comme données d’entrée dans les études en fatigue pour fiabiliser les résultats. Cependant, la complexité des données d’entrée et les temps de traitements très conséquents freinent leur utilisation par les ingénieurs lorsqu’il s’agit de structures de grandes dimensions. Afin de répondre aux besoins des industriels, deux développements ont été créés pour réduire le temps d’analyse des approches de Manson-Coffin et de Fatemi-Socie de près de 99,9%. Ces post-traitements font partie intégrante d’une stratégie originale de dimensionnement en fatigue chainant la prise en compte des effets locaux des procédés d’assemblage, et permettant ainsi l’analyse en fatigue des grandes structures dans un délais compatible avec les attentes des bureaux d’études
Since the 20th century, the continuous development of computing power has enabled numerical methods to become essential in the design process of industrial products. The finite element calculation method provides manufacturers with reliable solutions for accurately anticipating the mechanical strength of components by limiting the number of prototypes. The current trend of reducing manufacturing costs has a direct impact on product design with, in particular, the reduction of material thicknesses. In this context, the structural parts are more exposed to the risk of rupture. Controlling the fatigue behavior of components has now become a major challenge. This complex phenomenon is sensitive to the history experienced by the material, particularly with regard to the impacts on the local material properties by the various manufacturing processes. The welding process induces consequences at several levels of the assembly which can prove to be harmful for the life of the structures. These multi-physical phenomena of thermal, metallurgical and mechanical origin must then be taken into account as input data in fatigue studies to make the results more reliable. However, the complexity of the input data and the very substantial processing times hamper their use by engineers when dealing with large structures. In order to meet the needs of manufacturers, two developments have been created to reduce the analysis time of the Manson-Coffin and Fatemi-Socie approaches by nearly 99.9%. These post-processings take part of an original fatigue dimensioning strategy linking the consideration of the local effects of assembly processes, and thus allowing the fatigue analysis of large structures within a timeframe compatible with the industrial context

O uso das ligas de alumínio em aplicações estruturais tem crescido consideravelmente nas últimas décadas. Nos transportes, a baixa massa específica do alumínio resulta em uma alta razão resistência/ peso, favorecendo a fabricação de aviões, trens e automóveis. Com a crescente preocupação em reduzir a emissão de gases poluentes, vem tornando-se promissora a alternativa de reduzir o peso dos veículos substituindo peças convencionalmente produzidas com outros materiais por peças de alumínio. As ligas tratáveis termicamente da série 6xxx são frequentemente escolhidas para estas aplicações. Assim, para que o emprego dessas ligas seja otimizado, é importante um estudo mais detalhado de suas propriedades mecânicas, principalmente sob solicitações cíclicas. Neste trabalho foram estudadas ligas de Al-Si-Mg que são amplamente utilizadas nas indústrias automotivas, em especial na fabricação de componentes de carroçarias para caminhões e ônibus. Foi realizado o estudo do comportamento em fadiga de baixo ciclo e fadiga multiaxial das ligas AA6005 T6, AA6063 T6 e AA6351 T6, fornecidas pela CBA (Companhia Brasileira de Alumínio) visando caracterizar e comparar essas ligas em sua microestrutura, propriedades de tração e fadiga. As propriedades básicas de fadiga foram determinadas por meio do método ε-N (fadiga de baixo ciclo) e os ensaios foram realizados com controle de deformação total, onda triangular e taxa de deformação 0,005 seg-1. As análises dos laços de histerese elasto-plástica permitiram inferir sobre aspectos microestruturais relacionados às propriedades mecânicas das ligas estudadas. O comportamento em fadiga multiaxial foi avaliado por meio de carregamentos combinados axial-torcional em fase e fora de fase. Para ajustar os dados experimentais obtidos, foram testados alguns dos modelos encontrados na literatura. Os cálculos baseados no modelo de plano crítico, proposto por Fatemi e Socie, apresentaram resultados satisfatórios. Também foram realizadas análises microestruturais e fractográficas para as três ligas. As superfícies de fratura dos ensaios de fadiga multiaxial mostraram resultados diferentes de acordo com o carregamento adotado. A avaliação comparativa das três ligas estudadas fornece subsídios para fundamentar a seleção de materiais para a fabricação de componentes estruturais para o setor automotivo.
The use of aluminum alloys in structural applications has grown considerably in recent decades. In transportation, the low density of aluminum results in a high strength-to weight ratio, proving attractive for production of aircrafts, trains and automobiles. With a growing concern for the reduction of pollutant gas emissions, aluminum alloys are becoming a promising alternative to diminish vehicle weight through the replacement of conventionally produced parts made from other heavier materials for aluminum parts. The heat treatable alloys from the 6xxx series are often chosen for these applications. Therefore, to optimize the employment of these alloys, a detailed study of their mechanical properties, primary under cyclic solicitations is necessary For the present study Al-Mg-Si alloys were chosen, which are widely used in automotive industries, particularly in the manufacturing of components for trucks and bus bodies. The low-cycle fatigue behavior and multiaxial fatigue of the three following aluminum alloys: AA6005 T6, AA6063 T6 and AA6351 T6, provided by CBA (Brazilian Aluminum Company), were assessed, with the aim of characterizing and comparing these alloys in their microstructure, tensile properties and fatigue. The basic properties of fatigue were studied by ε-N method (low cycle fatigue) and the experiments were performed with total strain control, triangular waveform and with a constant deformation rate of 5.0x10-3 s-1. The analyses of hysteresis loops elasto-plastic provided insight about microstructural aspects, related to mechanical properties of the studied alloys. Multiaxial fatigue behavior was assessed in combined axial-torsion loading in phase and out of phase. To adjust the experimental data, some models found in the literature were tested. Calculations based on critical plane model, proposed by Fatemi Socie, presented satisfactory results. Furthermore, microstructure analyses and fractography were performed for these three alloys. The fracture surface of multiaxial fatigue assays demonstrated different results according to the adopted loading. Comparative evaluation of the three studied alloys provides support for the selection of materials for manufacturing structural components of the automotive sector.

De nombreuses structures industrielles soumises à des chargements à long terme statique (fluage) ou cyclique (fatigue) sont constituées de matériaux polymères semi-cristallins. C’est le cas notamment des canalisations et réservoirs sous pression. Il est donc essentiel de traiter les problématiques de durabilité pour être capable d'anticiper et de contrôler leur fin de vie. Par ailleurs, elles présentent généralement des formes complexes et sont soumises à des états de contrainte multiaxiaux.Le matériau de l'étude est un polymère semi-cristallin : le Polyamide 6. Il est caractérisé par la coexistence d'une phase cristalline et d'une phase amorphe qui s'arrangent selon une microstructure sphérolitique.Dans un premier temps, les liens entre comportement mécanique à l'échelle globale de l'éprouvette et les micro-mécanismes de déformation sous-jacents conduisant à la rupture sont établis expérimentalement pour des sollicitations en traction monotone et en fluage qui présentent des résultats similaires puis en fatigue. L'influence de la multiaxialité de l'état de contrainte est étudiée à partir d’éprouvettes axisymétriques entaillées de différents rayons de fond d'entaille et d'éprouvettes « Compact Tensile ». Les phénomènes de cavitation sont caractérisés grâce aux techniques de tomographie et laminographie à rayonnement X synchrotron qui permettent d'observer et de quantifier les distributions spatiales de taux de porosité volumique et le caractère anisotrope des cavités. Et l'analyse des faciès de rupture a permis de mettre en évidence que les mécanismes de croissance et de coalescence de cavités étaient à l'origine de l’amorçage ductile de la rupture.Ensuite, un modèle poro-visco-plastique à deux mécanismes (permettant de différencier le comportement des phases amorphe et cristalline) a été utilisé. Ce modèle permet de reproduire à la fois le comportement global (courbes de chargement) en traction monotone et en fluage mais aussi les distributions spatiales de taux de porosité obtenues expérimentalement. De plus, les calculs par éléments finis permettent d'étudier les distributions spatiales du champ de contrainte et d'établir l'influence de l'état de contrainte sur l'état de cavitation. Les évolutions temporelles en cours de déformation de la pression hydrostatique (ou contrainte moyenne) ont été reliées aux distributions spatiales de taux de porosité volumique. Et l'anisotropie de cavitation (et donc la morphologie et les facteurs de forme des cavités) a été reliée aux évolutions des composantes du tenseur des contraintes de Cauchy. Enfin, la définition d'un critère de rupture en taux de porosité critique a permis de simuler l'amorçage et la propagation de fissures en traction monotone et fluage
Many industrial structures subjected to quasi-static (creep) or cyclic (fatigue) long-term loadings are made of semi-crystalline polymers. Such is the case, for instance, of pressure vessels and pipes. It is therefore considered critical to study the issues related to their durability in order to be able to anticipate and control their end of life. Furthermore, they generally have complex designs and are subjected to multiaxial stress states.The material which has been studied was a semi-crystalline Polyamide 6. Its structure consisted of amorphous and the crystalline phases and a spherolitic microstructure.As a first step, the links between the mechanical behaviour at the global scale of the specimens and the underlying micro-mechanisms of deformation that lead to failure have been established experimentally for monotonic and creep loadings that show similar results and then for fatigue loadings. The influence of the multiaxiality of the stress state has been studied using circumferentially notched round bars with different notch root radii and Compact Tensile specimens. The cavitation phenomena were characterized using synchrotron radiation tomography and laminography techniques that enabled the observation and quantification of the spatial distributions of the voids and the anisotropy of the cavities. An analysis of the fracture surfaces has shown that the initiation of ductile failure resulted from void growth and coalescence mechanismsA poro-visco-plastic model with two mechanisms (that allow the behaviours of the amorphous and crystalline phases to be distinguished) has been used. Thanks to this model, the global behaviour (loading curves) under steady strain rates and steady loads but also the spatial distributions of the void volume fraction could be reproduced numerically. In addition finite element calculations have permitted the spatial distributions of the stress field to be studied and the influence of the stress state on the cavitation state to be investigated. The temporal evolutions during the deformation of the hydrostatic pressure have been linked to the spatial distributions of void volume fraction. The void anisotropy (and thus the void morphology and shape factors) has been related to the evolutions of the components of the Cauchy stress tensor. Finally, the definition of a rupture criterion based on a critical value of the void volume fraction has enabled crack propagation under steady strain rate and steady load to be simulated

Fatigue analysis is a critical stage in the design of any structural component. Typically fatigue is analysed during post-processing, but as the size of the analysed component increases, the amount of data stored for the analysis increases simultaneously. This increases the computational and memory requirements of the system, intensifying the work load on the engineer. A continuum mechanics approach namely ’Continuous time fatigue model’, for fatigue analysis is available in a prior study which reduces the computational requirements by simultaneously computing fatigue along with the stress. This model implements a moving endurance surface in the stress space along with the damage evolution equation to compute high-cycle fatigue. In this thesis the continuous time fatigue model is compared with conventional model (ie.Cycle counting) to study its feasibility. The thesis also aims to investigate the continuous time fatigue model and an evolved version of the model is developed for non-proportional load cases to identify its limitations and benefits.

Cette thèse est consacrée au développement d'un outil de pré-dimensionnement par éléments finis pour l'estimation de l'endommagement par fatigue polycyclique de structures linéaires sous chargements multiaxiaux et stationnaires gaussiens. L'état de contraintes atteint dans ces structures étant aléatoire, il devient nécessaire de raisonner en terme de statistique et l'approche spectrale s'avère particulièrement adaptée pour cette situation. Dans ce travail, les méthodes spectrales sont améliorées par la prise en compte des largeurs de bande des spectres de réponses des structures soumises à des chargements nonproportionnels et de moyennes non nulles. Le critère d'endommagement de Sines est retenu. L'étude numérique de la distribution de l'endommagement résultant des incertitudes sur les paramètres matériaux et des applications dans le domaine de l'optimisation des structures sont également abordées.

Esse trabalho propõe uma metodologia de otimização no processo de aprovação de componentes estruturais submetidos a carregamentos cíclicos que já tiveram a primeira rodada de testes físicos e falharam sem atingir os critérios de aprovação previamente estabelecidos. Os estudos de caso utilizados na aplicação do método foram dois componentes de suspensão de veículos comerciais. A metodologia proposta tem em sua base diversos tópicos da engenharia, como o estudo dos materiais dos componentes, análise de tensão e fadiga via elementos finitos, medição e análise de sinal de deformação e força, teste de durabilidade acelerado, além de correlação entre simulação e realidade. No âmbito da fadiga, a análise foi efetuada em ambiente virtual, através de um programa capaz de importar as tensões da simulação numérica e medições estruturais. É utilizada a metodologia S-N (tensão vida), através da criação de curvas S-N locais sintéticas, alteradas da curva original via fatores de influência como gradiente de tensão, tensão média (via diagrama de Haigh), rugosidade superficial e também pela distribuição estatística das propriedades do material. Por se tratar de carregamentos cíclicos aleatórios, uma análise de proporcionalidade do sinal é feita, além da utilização da previsão de vida em fadiga abordando os conceitos da fadiga uniaxial (utilizando tensão principal e von Mises) e também no caso multiaxial (utilizando o método dos planos críticos e tensão normal escalonada). Um grande grau de correlação entre simulação de tensão e testes físicos foi encontrado (pelo menos 90%). A previsão de falha por fadiga para os dois casos teve seus melhores resultados utilizando o método dos planos críticos. Os dois componentes encontram-se homologados por essa metodologia e atualmente são utilizados por veículos comerciais de série sem falhas observadas em campo, mostrando uma tendência de assertividade do método.
This work proposes a methodology to optimize the approval of structural components subjected to cyclic loadings that have had the first round of physical testing and failed to achieve the approval criteria previously established process. The case studies used in the application of the method were two commercial vehicle suspension components. The proposed methodology has its base in various engineering topics such as the study of the component materials, stress analysis and fatigue via finite elements, measurement and signal analysis of deformation and strength, accelerated durability test, and correlation between simulation and reality. Within the fatigue, the analysis was performed in a virtual environment, through a software able to import the stresses of numerical simulation and structural measurements. The S-N method (stress life) is used, through the creation of local synthetic S-N curves. The curve is modified from the original via influence factors such as gradient stress, mean stress (via Haigh diagram), surface roughness and also the statistical distribution of material properties. Because of the random cyclic loading, an analysis of the proportionality sign is made, in addition of the use of the fatigue life prediction by uniaxial fatigue (using principal stress and von Mises) and also in the multiaxial case (using the critical plans method and normal scaled stress). A high degree of correlation between stress and physical simulation tests was found (at least 90%). The prediction of fatigue failure for the two cases had their best results using the critical plans method. The two components are approved by this methodology and are currently used by commercial vehicles series without failures observed in the field, showing an assertiveness trend of the method.

This master’s thesis deals with a fatigue analysis of a roller bearing. The fatigue analysis consists of determining service-life of a roller bearing using a stress-strain analysis with finite element method and subsequent numeric calculation using software fe-safe with application of Brown-Miller multiaxial fatigue criterion. Service-life of a roller bearing is determined by number of cycles to failure in the form of pitting formation which is consequence of contact fatigue. According to calculations was found an inappropriateness of Brown-Miller criterion for high-cycle contact fatigue. Test of other available criteria was performed. Principal-Strain criterion provided the best match with ISO 281 standard.

Dissertação de Mestrado em Construção Metálica e Mista apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra.
One of the biggest challenges in front of the growing wind energy industry is to build higher towers for wind energy converters. In order to deal with such a problem a new hybrid tower, comprising a steel lattice lower part and a steel tubular upper part solution was proposed. The solution is targeted at tall onshore applications which are more effective in energy generation in situations where wind shear profile is clearly benefiting higher turbines, for example near forests. As part of this project, this thesis is focused on the fatigue assessment of tubular bolted connection of lattice tower. In first chapter, commercial towers for wind energy converters are briefly introduced, namely, concrete towers, welded steel shell towers, concrete/steel hybrid towers, lattice towers and hybrid lattice-tubular towers. In the second chapter, developments in fatigue analysis during the last decades and fatigue life prediction methods are given. Moreover, special emphasis is given to multiaxial fatigue life criteria which was used in fatigue life calculation of the connection used in this thesis. In the third chapter, numerical finite element modelling steps for stiffness calculation, global beam element model, and local connection model are given in detail. Additionally, finite element stress-strain results and fatigue life calculations using these results are also explained. In the last chapter, conclusions are drawn and further possible improvements of this work is suggested.

碩士
中華大學
機械與航太工程研究所
91
The low cycle fatigue life for AISI 316 stainless steel cylindrical specimens with transverse holes under out-of-phase multiaxial loading was experimentally analyzed in the study. Finite element method was employed to calculate the stress/strain behavior at the notch roots. The numerical simulation results were used to predict the crack initiation locations and initiation life with assistance of four critical plane models. Those are Brown-Miller model, Lohr-Ellison model, Fatemi-Socie model, and Smith-Watson-Topper model. A numerical code was developed to find the critical plane in the strain space. The predicted results show that the Fatemi-Socie model predicts the crack initiation life under out-of-phase loading within the variation band of factor two because the model includes the stress parameter which can account for the additional hardening effect in the out-of-phase loading. Furthermore, the predicted crack initiation locations are close to those observed in the experiments.

碩士
中華大學
機械與航太工程研究所
91
The crack initiation life of cylindrical specimens with circumferential groove under out-of-phase multiaxial cyclic loading was studied. It is found that the crack initiation life under out-of-phase loading is longer than that under in-phase loading for the evidence of addition hardening effect. To find the local stress/strain history at the stress concentrations, finite element method was used to estimate the local behavior under the cyclic multiaxial loading. Four critical plane approaches; Brown-Miller model, Lohr-Ellison model, Fatemi-Socie model, and Smith-Watson-Topper model, were used to predict the crack initiation life with the assistance of the smooth specimen data. The critical planes for specific models were found by a numerical program in the strain space. Furthermore, the fracture surfaces were also examined in the study.

In der Praxis weisen Wellen und Achsen häufig komplex gestaltete oder überlagerte Kerbformen (Mehrfachkerben) auf, die von normativen Methoden zur Berechnung der Ermüdungsfestigkeit nicht erfasst sind. Die vorliegende Arbeit widmet sich daher der Zusammenführung von Kerbspannungsergebnissen einer Finite-Elemente-Analyse mit dem genormten Ermüdungsfestigkeitsnachweis nach DIN 743. Dazu erfolgt die Ableitung einer neuen, spannungsmechanisch begründeten Berechnungsmethode zur Integration von örtlich mehrachsigen Spannungszuständen in den nennspannungsbasierten Tragfähigkeitsnachweis. Die grundlegende Vorgehensweise der Norm wird nicht verändert. Sensitivitätsanalysen an einem Anwendungsbeispiel liefern zentrale Aussagen zur Relevanz verschiedener festigkeitsbeeinflussender Effekte bei Mehrfachkerben. Die Ergebnisse münden in einer anwendungsbereiten und ganzheitlichen Berechnungsanleitung für die Ermüdungsfestigkeitsberechnung von Bauteilen mit Mehrfachkerben in Anlehnung an DIN 743. Der zweite Teil der Arbeit wendet die erarbeitete Methode auf eine in der Konstruktionspraxis immer wiederkehrende Mehrfachkerbe, die Zahnwellenverbindung mit freiem Zahnauslauf, an. Als Ergebnis einer umfangreichen Parameterstudie liegen dem Anwender Berechnungsfaktoren zur Erfassung der Kerbwirkung für Zahnwellenverbindungen nach DIN 5480 in Abhängigkeit von zahlreichen geometrischen Einflussparametern vor. Abschließend werden die entwickelten Berechnungsmethode im Allgemeinen und die ermittelten normspezifischen Kennwerte für Zahnwellenverbindungen im Speziellen an vorhandenen experimentellen Stichversuchen aus der Literatur gespiegelt.