弯曲行为文献22 Equilibrium-Equilibrium Structural Stress Approach to Fatigue Evaluation of a Rectangular Hollow Section Joint.pdfVIP

International Journal of Fatigue 27 (2005) 85–94 /locate/ijfatigue Equilibrium-equivalent structural stress approach to fatigue analysis of a rectangular hollow section joint Hiroko Kyuba a,, Pingsha Dong b a Technical Center, Caterpillar Inc., Mossville, IL 61552, USA b Center for Welded Structures Research, Battelle, Columbus, OH 43201, USA Received 4 September 2003; received in revised form 19 April 2004; accepted 17 May 2004 Abstract The equilibrium-equivalent structural stress method has been recently developed through several joint industry projects as a robust method to analyze welded components using finite element methods. This method has been proven effective in correlating a large amount of published fatigue test results in the literature. The authors employed this equilibrium-equivalent structural stress method for a competition organized by the SAE Fatigue Design Evaluation (FDE) Committee to predict the fatigue life of a rectangular hollow section joint. Among all the methods used by many participants, the authors’ life prediction was selec- ted as the best, based on the actual test results. This paper provides the details of the SAE FDE fatigue challenge problem defi- nition, test results, and our structural stress approach. The predicted mean life by the equilibrium-equivalent structural stress method utilizing the proposed ASME Div. II Structural Stress curve was in excellent agreement with the actual mean life of the experimental results. Other stress indexes (such as the maximum principal stress and the von Mises stress) had m