Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 116, Issue -, Pages 317-322Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2018.06.044
Keywords
Lifetime estimation; Short-time procedure; Fatigue; Hybrid composites
Funding
- German Research Foundation (DFG) [BA 4073/6-1]
- Institute for Composite Materials (IVW) [BR 4262/2-1]
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For structural applications in the automotive and aircraft industries carbon fiber reinforced polymers (CFRP) have become increasingly important because of their outstanding strength-to-density ratio. A brittle failure behavior, poor damage tolerance and an insufficient level of electrical conductivity are drawbacks compared to monolithic metallic concepts which lead to a limited lightweight potential of composites. The integration of thin metal fibers as well as carbon fibers (MCFRP) is a promising new approach to advance the mechanical properties of conventional CFRP-structures. Structural components are subjected to cyclic loads during their lifetime. The fatigue behavior itself of both laminates MCFRP and CFRP - was intensively investigated in Backe et al. [1]. The aim and novelty of the present study is a time - and resource-saving concept to analyze the fatigue behavior of composites. Therefore, the focus is on a new short-time procedure for fatigue life calculation of composites based on several cyclic load increase tests of each laminate. A clear correlation between experimental data of various constant amplitude tests with varied frequencies and calculated S-N curves is shown for MCFRP and CFRP laminates.
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