Fatigue life of post-buckled composite structures

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The fatigue life prediction of post-buckled composite structures represents still an unresolved issue due to the complexity of the phenomenon and the high costs of experimental testing. In this paper, a novel numerical approach, called “Min-Max Load Approach” is adopted to analyze the behavior of a single-stringer composite specimen with an initial delamination subjected to post-buckling fatigue compressive load. The proposed approach, based on cohesive zone model technique, is able to evaluate the local stress ratio during the delamination growth, performing, in a single finite element analysis, the simulation of the structure at the maximum and minimum load of the fatigue cycle. The knowledge of the actual value of the local stress ratio is crucial to correctly calculate the crack growth rate. At first, the specimen is analyzed under quasi-static loading conditions, then, the fatigue simulation is performed. The outcomes of the numerical analysis are compared with the data of an experimental campaign previously conducted.
Original languageEnglish
Title of host publicationProceedings of 22nd International Conference on Composite Materials (ICCM22), Melbourne, AU, August 11-16, 2019
Number of pages8
Publication statusPublished - 2019
Event22nd International Conference on Composite Materials - Melbourne, Australia
Duration: 10 Aug 201916 Aug 2019
Conference number: 22


Conference22nd International Conference on Composite Materials
Abbreviated titleICCM22 2019


  • Fatigue
  • Skin-Stringer Separation
  • Min-Max Load Approach
  • Cohesive Zone Model


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