Browse Publications Technical Papers 2017-01-0343
2017-03-28

A Structural Stress Recovery Procedure for Fatigue Life Assessment of Welded Structures 2017-01-0343

Over the decades, several attempts have been made to develop new fatigue analysis methods for welded joints since most of the incidents in automotive structures are joints related. Therefore, a reliable and effective fatigue damage parameter is needed to properly predict the failure location and fatigue life of these welded structures to reduce the hardware testing, time, and the associated cost. The nodal force-based structural stress approach is becoming widely used in fatigue life assessment of welded structures. In this paper, a new nodal force-based structural stress recovery procedure is proposed that uses the least squares method to linearly smooth the stresses in elements along the weld line. Weight function is introduced to give flexibility in choosing different weighting schemes between elements. Two typical weighting schemes are discussed and compared. Published fatigue data of Gas Metal Arc Welds (GMAW) are utilized to investigate the mesh-insensitivity by comparing the structural stress results obtained from various mesh densities and patterns. The fatigue life correlation for GMAW coupons between the new structural stress and the experimental fatigue life data are discussed.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Static and Fatigue Performance of Fusion Welded Uncoated DP780 Coach Joints

2008-01-0695

View Details

TECHNICAL PAPER

Development of the 6.8L V10 Heat Resisting Cast-Steel Exhaust Manifold

962169

View Details

TECHNICAL PAPER

Development of CAE Methodology for Joining of Dissimilar Metals Using Cold Metal Transfer and Its Validation

2014-28-0017

View Details

X