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Weld Project

Weld Challenge 5, 8/24/05 (posted here for the first time on on 9/15/05)

It's time to contemplate the next weld challenge.
 
This one is an offshoot of the previous weld challenge.

In the two alternate geometries presented in the last weld challenge by Helmut Dannbauer of Magna Steyr on pages 5 and 7 of his presentation ( <http://www.fatigue.org/minutes/Spring-2005/Weld_Challenge4_FEMFAT.pdf> ) the initiation point he predicted changed quite radically from the side/center of the tube on page  5  to just beneath the cylindrical detail on page 7.  The challenge is to analyze both geometries and predict the initiation locations and lives.  We would like to compare and contrast the solutions given by various researchers, and if questions arise, plan some experiments ...

Please let John Bonnen (jbonnen(at)ford.com, 313-322-9127) know of your intention to participate in the Weld Challenge by Sept 16.

Weld Challenge 4, 3/10/05

• Click here for Introduction

• Weld Session during meeting on 4/12-13/05

  • Previous Weld Challenges Overview, John Bonnen, Ford
  • Weld Challenge 4 Overview, John Bonnen

  Solution for Weld Challenge #4  

  • Weld Challenge 4 Results, Helmut Dannbauer, Magna Steyr

Weld Challenge 3, 10/12/04, Urbana-Champaign, IL

• Overview of Challenge 1 and 2
• Introduction to Challenges 3a and 3b, click here.
• Details here. (Additional details here)
  • CAD file here, 5 MB

Analysis 3 a

• Weld Life Estimate, 3a, Michele Wegscheid
• Weld Challenge, Kai Erben and Michael Kienert
• Weld Challenge 3, Helmut Dannbauer and Gerald Schwarz
• Weld Challnege 3, Pingsha Dong

Answer 3 a:

• Results (posted 2/2/05 and update 4/11/05), click here

Analysis 3 b

• Weld Life Estimate, 3b,  Michele Wegscheid

Answer 3 b:

Summary:

Weld Challenge 2, 4/14/04, Fort Wayne, IN 

For instructions click here

Analysis:

• Structural Stress Method, Michele Wegscheid
• Weld Challenge 2 A Life Prediction - RHS joints under variable amplitude loading, Pingsha Dong
• Weld Challenge 2, Ajay Vittalam

Answer:

• Weld Challenge II, John Bonnen presentation
• Strain gage experiments, Kurath, El Zein, presentation, time histories

Summary:

• Summary Results here. 

Weld Challenge 1, 4/16/03, Peoria, IL
A new initiative is being considered. See the attached Word document (406 kB) for details.

Analysis:

• SEAM Weld Fatigue Analysis FEMFAT, Ajay Vittalam 

• Life Predictions Using Mesh-Insensitive Structural Stress Method, P. Dong
• SAE Weld Challenge- Fatigue Life Prediction, Chris Sanger
• Failure Modes, Vijay Dara
• Weld Fatigue - Deere Tube Example. Michele Wegscheid

Answer:

• Welds and their Headaches, Mohamad El-zein

Summary: