Crack Initiation Life Model of Stiffened Plates Based on Damage Mechanics

Abstract:

Based on the continuum damage mechanics theory, according to the development of the fatigue damage evolution equation, and combining the interaction coefficient of stiffener and plate, with plastic strain as the control quantity of damage evolution, the stiffened plate low cycle fatigue damage mechanics model is established, and the calculation method of the fatigue crack initiation life is obtained. This method for the initiation life of fatigue crack is divided into the life before the damage and the life of the damage evolution. The model results are compared with those of the finite element results. Conclusions show that the model can reflect the regularity of axial plastic strain evolution of stiffened plate, and can be directly used for fatigue loads analysis under the mechanism of initiation life.

• Periodical: Advanced Materials Research (Volume 904)
• Pages: 508-512
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.904.508
• Online since: March 2014
• Authors: Hong Wang, Ping Yang*, Jun Lin Deng, Qin Dong
• Keywords: Crack Initiation Life, Damage Mechanics, Low Cycle Fatigue, Stiffened Plate

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