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Structural mechanics
Structural mechanics
Concept design phase simulations

Simulation of Bolt Connections in Accordance with VDI 2230

Analyze multi-bolted connections confidently and quickly


Training eLearning Advanced

Learn how to correctly perform a systematic strength verification in accordance with VDI Guideline 2230 directly within your simulation environment. This training is offered as a 3-day course or alternatively as a self-paced eLearning course.

3 days

Basic knowledge of Ansys Mechanical

Software used
Ansys Mechanical, Bolt Assessment inside Ansys

  • Familiarization with the VDI 2230 1/2 verification concept (Guideline available on the CADFEM Learning Center)
  • Practicing correct methods of FEM modeling and evaluation of bolts
  • Assessment of bolts corresponding to model classes II and III by simple click
  • A free 3-month license giving access to “Bolt Assessment inside Ansys”


Engineers dealing with the systematic strength analysis of bolt connections utilize the VDI 2230 guidelines. These guidelines allow for systematic verifications, taking into account the assembly situation, static and dynamic loads, contact pressure, and thread shear. The FE method enhances these capabilities by incorporating contacts and nonlinear effects into the design. It offers a more realistic representation of components and enables the calculation of multi-bolted connections.

In our training, you will learn the calculation process according to VDI 2230 and learn about the four model classes according to VDI 2230 Sheet 2. You will practice FEM modeling and evaluation of bolts and learn how to efficiently carry out bolt assessment and verification up to the automatically generated report for model classes II and III. Furthermore, we deal with the calculation of contacts and the consideration of other nonlinear effects using numerous practical Ansys-based examples.

As a developer, design engineer, or user of simulation software, take this opportunity to expand your skills and optimize your daily work. You will also receive a free 3-month license for "Bolt Assessment inside Ansys".

Test the first module for 30 days free of charge

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 3-day training

Day 1

01 Bolts as detachable connection elements

  • Technical applications
  • How bolts function
  • Design principles and properties of a standard bolt
  • Discussion: requirements and application scenarios relating to bolt connections
  • Damage scenarios in cases of unsatisfactory bolt layout

02 Principles underlying the VDI 2230 guidelines (Sheets 1 and 2)

  • Overview of Parts 1 and 2 of the guidelines
  • Concept of nominal stress
  • Cyclical loading and fatigue limit
  • Idealization of the bolt connection
  • Elastic resilience and joint diagram
  • Practice: understanding joint diagram

03 Generating geometric models of bolt connections

  • Methodology and aims of FE analysis
  • Modeling component resilience
  • Idealization of bolt bodies and nuts
  • Modeling of clamped parts
  • Practice: geometry preparation of a bolt connection

04 Bolt connection in FE simulation

  • Applying bolt pretension
  • Assembly loads and operational loads
  • Introduction to nonlinear contacts
  • Introduction to meshing
  • Results and evaluation
  • Practice: FE analysis of a bolt connection

Day 2

05 Deepening your understanding of the VDI 2230 guidelines

  • The load introduction factor “n”
  • Eccentric assembly and loads
  • The main dimensioning formula
  • Aspects of assembling and tightening bolts
  • Reduction of pretension due to embedding
  • Practice: Representation of the load introduction factor and embedding effects in the joint diagram

06 FE model classes I-IV

  • From simple bonded contacts to beam and solid joint models
  • Component resilience, pretension, interface contact and bearing contacts
  • Determining load values
  • Comparison of model classes
  • Practice: beam connections
  • Example: line bodies for use with model class II

07 Modeling contacts for bolt connections

  • Defining nonlinear and linear contacts
  • Contact algorithms, contact stiffness and penetration
  • The connection between contact settings and load values
  • Best practice for the contact settings used when assessing bolted joints
  • Practice: the impact of contact settings on the accuracy of results

08 Working productively on real models

  • How to deal with large numbers of bolts and load steps
  • Repetitive workflows: the object generator
  • Opportunities for automation
  • Using “Bolt Assessment inside Ansys”
  • Practice: Gear box housing for a tractor

Day 3

09 Analytical verification calculation in accordance with VDI 2230

  • Analyzing and verifying a bolt connection
  • Calculation steps R0 – R13
  • Static and dynamic strength verification
  • Practice: performing an analytical verification calculation for bolted joints on a cap of a pressure vessel
  • Initial thoughts on putting everything into practice in the world of FE analysis

10 Using the FE method to perform verification calculations of bolted joints

  • Commonalities and differences compared to the analytical approach within VDI 2230
  • Advantages of FE analysis
  • The conventional method of analysis in the FE world
  • Evaluating the load values
  • Practice: verification of bolted joints on a cap of a pressure vessel using FE simulation

11 Verification using Bolt Assessment inside Ansys

  • Automated analysis of multi-bolted connections
  • Integrated KISSsoft database containing bolt standards
  • Automatic definition of critical load combinations and loading conditions
  • Visualization of the safety factors
  • Standardized verification and report
  • Practice: bolt connection between piston and piston rod
  • Practice: a multi-bolted flange connection

12 Additional methods for analyzing bolts using the FE method

  • Further aspects of Sheet 2 of VDI 2230
  • Using the FE method to determine component resilience
  • The parameters of eccentric connections within FE models
  • Evaluating local stress within notch roots
  • Practice: evaluating local stress in a model class IV approach and comparison with evaluation using the FKM method

Your Trainers

Dario Rüegg
Engineering Services, CADFEM (Suisse) AG, Aadorf
Vincent Constantin
Engineering Services, CADFEM (Suisse) AG, Aadorf
Markus Meingast
Head of Engineering Services, CADFEM Germany GmbH, Grafing
Klaus Graf
CAE Engineer, CADFEM Germany GmbH, Hanover
Florian Hollaus
CAE Engineer, CADFEM (Austria) GmbH, Innsbruck

Placement in the CADFEM Learning Pathway

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Test the first module for 30 days free of charge

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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Test the first module for 30 days free of charge

Get a first impression and test the first eLearning module of this training course without any obligation. No costs, no notice period.

Not the right offer or date?

Whether eLearning, classroom courses, live online training or customized workshops - together we identify the best option for you.

Kick Start into Practice!

So that you immediately put your new knowledge into practice, you will receive access to the VDI Guideline 2230 Sheet 1 & Sheet 2 in the CADFEM learning portal as well as a free 3-month "Bolt Assessment inside Ansys" license.


What CADFEM customers are saying

Oliver Titsch
Structural engineer, Manitowoc Crane Group Germany GmbH

Thank you very much for the very interesting CADFEM training on the simulation of bolted joints according to VDI 2230! What is important now is putting this knowledge into practice, although I will first create the simplest models, which can be quickly checked by hand.

Do you have questions on the training or the eLearning?

When will I receive the final confirmation for my training booking?

Straight after you sign up, an automatic confirmation of receipt will be sent to the email addresses you provided. Once you have successfully verified the data you provided, you will receive your personalized sign-up confirmation, containing further information on course fees, the billing address, etc., by email within two to three working days.  

As soon as the minimum number of attendees has been reached, you will receive a final training confirmation containing further information. If you have booked an on-site training, we recommend that you wait until you have received this final confirmation before booking your travel and accommodation.

If the minimum number of attendees is not reached, we reserve the right to cancel the training seven days before it is due to start at the latest. We are happy to inform you on changing your booking to an alternative date. Please note that we accept no liability for hotel or travel bookings that attendees have already made.

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Training places will generally be allocated based on the order in which attendees sign up. For this reason, we always recommend booking for your desired date as early as possible.

As long as a coures still has free places, it can be booked.

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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). 

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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.

How much time should I allow for an 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.

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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.

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