SD2420 Advanced design of welded structures 6.0 credits

Avancerad dimensionering av svetsade konstruktioner

  • Education cycle

    Second cycle
  • Main field of study

  • Grading scale

    P, F

Course offerings

Spring 19 for programme students

  • Periods

    Spring 19 P4 (6.0 credits)

  • Application code

    60295

  • Start date

    18/03/2019

  • End date

    04/06/2019

  • Language of instruction

    English

  • Campus

    KTH Campus

  • Tutoring time

    Daytime

  • Form of study

    Normal

  • Number of places

    No limitation

  • Schedule

    Schedule (new window)

  • Course responsible

    Zuheir Barsoum <zuheir@kth.se>

  • Teacher

    Zuheir Barsoum <zuheir@kth.se>

  • Target group

    Open for:

    CMAST, M, T, TTEMM, CFATE, FRIST, TMSEM, TPRMM, TTMVM, CDEPR, TAEEM, TMRSM, TSUEM, CDEPR, TIPUM, TMRSM, TPRPM, TFORM, TSOVM

Spring 20 for programme students

  • Periods

    Spring 20 P4 (6.0 credits)

  • Application code

    60600

  • Start date

    16/03/2020

  • End date

    01/06/2020

  • Language of instruction

    English

  • Campus

    KTH Campus

  • Tutoring time

    Daytime

  • Form of study

    Normal

  • Number of places

    No limitation

  • Course responsible

    Zuheir Barsoum <zuheir@kth.se>

  • Teacher

    Zuheir Barsoum <zuheir@kth.se>

  • Target group

    Open for:

    CMAST, M, T, TTEMM, CFATE, FRIST, TMSEM, TPRMM, TTMVM, CDEPR, TAEEM, TMRSM, TSUEM, CDEPR, TIPUM, TMRSM, TPRPM, TFORM, TSOVM

  • Part of programme

Intended learning outcomes

In order to guarantee the strength of a welded structures different design codes have been developed during the last 30 years and have been applicable within the manufacturing industry with low accuracy and precision. As the finite element analysis is nowadays a widley used tool new developed design codes are applicable with better accuracy and precision. After the course the student should be able to:

  1. Chose method for fatigue life assessment with reasonable accuracy for different types of welded jonits and structures.
  2. Understand the effects of welding residual stress on the strucutral integrity.
  3. Understand the influence of different types of weld defects and discontinuities on the the fatigue strength of welded jonits.
  4. Choose appropriate analysis method and perform fatigue life assessment of complex welded structures.
  5. Chose relevant post weld improvment techniques for different welded applications.
  6. Use weld quality systems. 

Course main content

This course discuss different advanced methods for fatigue design of welded structures; nominal stress method, hot spot (geometric/structural) stress method, effective notch stress method and applied linear elastic fracture mechanics (LEFM). Infleunce of different factors that effect the fatigue life and breakdown is discussed, such as; stress concentrations, weld defects, welding residual stresses, multiaxial stress states, etc. Different post weld improvement techniques in order to increase the weld quality and the fatigue strength of welded structures is duscussed. Different weld class systems in order to assure the weld quality of welded jonits in the design and  during production is discussed and compared. Different design codes, guidelines for practice and reccomendations for welded jonits are discussed, e.g. IIW:s "recommendations for fatigue design of welded jonits and components". Evaluation and fatigue design of welded structures using FEM is treated regarding; boundary conditions, accuracy, non-linearity, sub-modelling techniques, 3D effects. Different state-of-the art applied fracture mechanical softwares for prediction of the fatigue life of welded jonits is presented, discussed and utilized.

Eligibility

FEM, Linear elastic fracture mechanics (LEFM) and basic knowledge in solid mechanics, material mechanics and fatigue.

Literature

1) A special written course compendium: Advanced design of welded structures.

2) Extract from Articles, standard and design codes will be handed out.

Recommended literature for further reading will be announced at the course start.

Examination

  • BER1 - Assignment 1, 2.0, grading scale: P, F
  • BER2 - Assignment 2, 2.0, grading scale: P, F
  • LAB1 - Labs and assignments, 2.0, grading scale: P, F

Grading scale P/F

Requirements for final grade

LAB1 - 3 computerlabs/excercises on fatigue design and FEM. Examination by handing in lab report.

BER1 - 1 extensive home assignment on fatigue design of a welded structure. Examination; handed in report.

BER2 - 1 extensive home assignment and case study on fatigue design of a welded structure. Examination; handed in report.

Offered by

SCI/Aeronautical and Vehicle Engineering

Contact

Zuheir Barsoum, zuheir@kth.se

Examiner

Zuheir Barsoum <zuheir@kth.se>

Version

Course syllabus valid from: Autumn 2010.
Examination information valid from: Autumn 2009.