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Structural Durability Enhancement through Spot Welds – An Automated Methodology
Technical Paper
2004-01-0879
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Structural durability is one of the key factors in determining the robustness of a product having a direct bearing on customer perception of quality and reliability in passenger vehicles, and is one of the major factors affecting customer loyalty.
It is recognized that significant fatigue failures occur at spot welds in an automobile body structure, and accordingly various methods are adapted in the industry to predict such failures. However, most of them follow the traditional fatigue and fracture analyses, which are computationally challenging, expensive as well as mathematically complex to apply on a full vehicle system. As a result, most of these methods depend on iterative solutions e.g. Design of Experiments.
An indigenous method of evaluating failures at welds and/or their vicinity and their implication on the structural failure and life is developed [1] which is incorporated into a user friendly computational environment for assisting product designers to design spot weld layouts for efficient load transfer as well as improved structural life. The method is based on a family of indigenously developed set of rules based on strength, compliance and failure modes as well as an ever growing set of heuristics based on experience in the field. The method is simple to use as it is based on the popular finite element models and their linear solutions (static, eigen and forced response). In this paper, a brief overview of the method is presented from durability perspective followed by some typical results from some typical automotive structural assemblies.
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Authors
Topic
Citation
Naganarayana, B., Shankar, S., and Dashko, R., "Structural Durability Enhancement through Spot Welds – An Automated Methodology," SAE Technical Paper 2004-01-0879, 2004, https://doi.org/10.4271/2004-01-0879.Also In
References
- Naganarayana B P Shankar S Bhattachar V S “Enhancement of dynamic characteristics in an analytical model”
- Madasamy Chelliah Guimberteau Thierry Tyan Tau Faruque Omar “An Investigation of Spot-Welded Steel Connections Using a Doe Approach” 2003-01-0612 , Spot Weld Strength for Crash Applications, SAE 2003 World Congress & Exhibition March 2003
- Naganarayana B. P. Shankar S. Bhattachar V S “Product Dynamic Characteristics and Life Improvement through Spot-Weld Layout and Design Enhancement” 2003-01-1326 , Optimization, SAE 2003 World Congress & Exhibition March 2003
- “N-hance.DOC: A software for enhancing dynamic and life characteristics of a structural assembly through spot welds“