Quick Insights on Fatigue Life Assessment with FEM
From set square and calculation assessment to Excel for fatigue and life cycle calculation using FEM: this training provides a clear and understandable introduction into fatigue life assessment. This training is offered as a 2-day course or alternatively as a self-paced eLearning course.
Duration
2 days
Prerequisites
Basic knowledge of Ansys Mechanical
Software used
Ansys Mechanical
- Applying methods supported by Excel Tools to calculation tasks
- A quick introduction into fatigue strength with FEM
- Independently carrying out strength verifications using FEM results
- Increasing the capacity of existing components
Description
Operational strength calculations are increasingly being performed following a finite element (FEM) calculation. This often leaves many questions unanswered. How fine should the FE mesh be? What elements should be used? How do you evaluate a stress gradient? What should you consider when constructing and evaluating a finite element model? How do you calculate an SN curve for your finite element model?
This training focuses on the fundamentals of fatigue life assessment and provides a clear and understandable presentation in simple language. You will receive concrete and directly applicable methods supported by Excel tools for an independently created operational strength verification based on finite element results. The theory is supplemented by practical exercises and sample solutions.
Are you an experienced computational engineer? Do you validate your components with regulations such as the FKM Guideline? Or are you a newcomer to structural mechanical simulation and fatigue life calculation? Then this course is just right for you!
Get a first impression and test the first eLearning module of this training course without any obligation. No costs, no notice period.
Detailed agenda for this 2-day training
Day 1
01 FEM for fatigue strength
- The requirements of FEM software from the perspective of fatigue strength
- Practical tips for the application of FEM for fatigue strength
- Demo: Use of FEM, analysis and validation of the results
02 Static Strength assessment
- Stress types
- Notch effect
- Supporting effect
- Over-elastic stresses
- Component yield curves
- Exercise: Analysis of a crane hook and its static protection
03 S-N fatigue curves
- Periodic vibration stress
- Wöhler lines and Wöhler line diagrams
- Computing Wöhler stress lines
- Cyclical deformation behavior
- Exercise: Calculating the Wöhler line for a shaft shoulder (as input for later FEM analysis)
04 Fatigue strength assessment
- Strength hypotheses and material behavior under multiaxial vibration loads
- Fatigue strength verification
- Fatigue strength diagram
- Considering the statistical scatter of fatigue strength values
- Principal impacts on vibration resistance
- Exercise: Carrying out a fatigue strength verification of an FE model
Day 2
05 Variable amplitude loading
- Basic statistical concepts
- Classification method with two-parameter counting (rainflow counting)
- Further processing of classified stress data
- Extrapolating measured collectives
06 Damage accumulation and fatigue life estimation
- Models for damage accumulation with vibrating loads (Miner rules)
- Fatigue and durability lines
- Damage accumulation with overset mechanical and thermal stresses
- Considering statistical scatter in the fatigue and durability assessment and derivation of appropriate safety factors
- Exercise: Calculating the fatigue and durability of a crane hook
07 Overview of advanced methods
- Calculating weld seams
- Low cycle fatigue in accordance with the strain concept
- Approaches to evaluation of multiaxial loads
- Guideline FKM
- DIN 743
08 Realistic exercise example
- Applying the notch root concept to constructions with nominal stresses and local elastic stresses (FEM)
- Assessing component Wöhler lines
- Fatigue strength verification to estimated dimensioning, DIN 734, and FKM 183 based on nominal and local elastic stresses (FEM)
- Processing with load sequences for multilevel vibration loads (classification and extrapolation)
- Operational strength with FEM with linear-elastic computation
Your Trainers
Dr.-Ing. Stefan Einbock
Florian Mailänder
Artur Bocian
Placement in the CADFEM Learning Pathway
Participant data
Additional information
Commentary
Get a first impression and test the first eLearning module of this training course without any obligation. No costs, no notice period.
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Usually the training courses start at 9:00 am and end at 5:00 pm of the respective local time. The actual course times will be stated in the booking confirmation. Please note that, depending on the training host, there may be a possible time shift between your and the provider's local time. Therefore all local times are provided with the valid time shift to Greenwich Mean Time (GMT).
To get a clear impression of our online learning format, we offer you a trial allowing you access to the starting module of an eLearning course of your choice. No costs, no cancellation period or anything similar. Moreover, with this free test access you can check all the technical requirements for a smooth learning process. You can easily request the free module from any eLearning course.
Each online course day comprises four eLearning modules. You should ideally allow 90 to 120 minutes of uninterrupted learning time for each module. This will allow you to acquire the knowledge provided by a module and to consolidate it through quiz questions and Ansys exercises. By dividing each module into micro learning units, you can also make good use of smaller time windows, such as on your commute.
Prerequisite for the use of the eLearning courses is the use of a personalized access to the CADFEM learning platform. When purchasing an eLearning course, access to the learning platform is 365 days. As a subscription user, access to the learning platform starts and ends with the start and end of the flat rate. With the start of a further learning product (Learning Subscription, training, eLearning), access to your content is extended by 365 days.