Differences in application and methods of weld seam calculation

Reliable application of recognized calculation methods

Online seminar: Design and verification of welded seams | MDESIGN

Main focus

  • Properties of welded joints and why damage to welded structures can occur
  • Verification concepts for the calculation of welds (nominal, structural, notch and effective stress concepts) and their areas of application
  • FEM modeling techniques for the verification concepts
  • Weld seam calculations according to FKM, Eurocode, DVS 1612 and IIW recommendations with examples
  • Use of state-of-the-art tools for weld seam evaluation with examples
  • Relationship between weld quality (e.g. evaluation group according to ISO 5817) and stressability of welds based on DVS 0705
  • Increasing the fatigue strength of welds by using weld post-treatment methods (e.g. higher-frequency hammering with PIT)


On the subject

Welded joints play an important role in mechanical engineering, plant construction, rail vehicle construction, pressure vessel construction, vehicle construction and many other industries. It is therefore essential for designers and engineers to have extensive knowledge of the calculation and design of welded structures. Various standards and guidelines can be applied to ensure the load-bearing capacity (static and dynamic).

Therefore, it is of enormous importance to understand these regulations and to know which one can and should be applied for the specific welded component. Especially with regard to product liability and component optimization (weight reduction) also with the background of cost reductions, the importance of weld seam calculation according to the current state of the art definitely continues to increase.



In this seminar, you will learn how welded structures can be designed or calculated economically in practice according to FKM guideline, Eurocode and DVS 1612. The main area of application for FKM strength verification is in mechanical engineering and related areas of industry. The strength verifications according to Eurocode (EC 3 Steel Construction) are used for steel structures and DVS 1612 in rail vehicle construction.

In addition to the different verification concepts - nominal, structural, notch and effective stress concept and their application areas - you will also learn about the use of state-of-the-art software tools (FKM inside ANSYS, Limit, MDESIGN weld) using various examples. You will understand how and why the stressability (static and dynamic) of welds depends, among other things, on their execution quality (e.g. evaluation group according to ISO 5817). The fatigue strength of welds can be increased enormously with various weld post-treatment processes, which is also already taken into account in various sets of rules.



Properties of welded joints

  • Cracking phenomena in welded joints
  • Fractures in welded joints
  • Structure of fusion welded joints
  • Possible hardening during welding
  • Welding triangle - weldability of a construction
  • Examples of damage patterns in welded constructions

Verification concepts for the calculation of welded joints

  • Nominal stress concept
  • Structural stress concept
  • Notch stress concept
  • (Effective stress concept)

Modeling techniques FEM for evaluation according to

  • Nominal stress concept (preferred for very large, thin-walled structures such as car bodies in railway vehicles)
  • Structural stress concept
  • Notch stress concept using submodel technique
  • (Effective stress concept)

Weld seam calculations according to FKM, Eurocode and DVS 1612

  • Static and fatigue strength verifications
  • With nominal stresses and local stresses
  • Examples with different tools (FKM inside ANSYS, Limit and MDESIGN weld)

Relationship seam quality - stressability

  • Evaluation groups according to ISO 5817 steel (ISO 10042 aluminum alloys)
  • Weld post-treatment methods and their influence on fatigue strength


Target group

Engineers and specialists from the fields of development, design and calculation from general mechanical engineering and special mechanical engineering, teachers from educational institutions, specialists from research institutions and testing companies.



  • First participant from a company: 790,- € (excl. VAT)
  • Each additional participant from the same company: 580,- € (excl. VAT)
  • University members (teachers and students): 295,- € (excl. VAT)

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Seminar on November 13 + 14:



You will receive detailed seminar documents as well as a certificate of participation.


Your speakers

Dipl.-Ing. Michael Vorndran

  • Mechanical engineering studies at the TH-Ingolstadt (Dipl.-Ing.)
  • M.Eng. Applied Computational Mechanics at ESoCAET (European School of CAE Technologies, TH-Ingolstadt and HAW-Landshut)
  • Over 12 years of experience with FEM calculation in the field of rail vehicle construction, mechanical engineering

Mario Windler

  • B.Sc in General Mechanical Engineering at Zurich University of Applied Sciences
  • M.Eng. Simulation Based Engineering ESoCAET (European School of CAE Technologies, TH-Ingolstadt and HAW-Landshut) (5th semester)
  • Calculation engineer at Brand Engineering GmbH