Skip navigation
SuUB logo
DSpace logo

  • Home
  • Institutions
    • University of Bremen
    • City University of Applied Sciences
    • Bremerhaven University of Applied Sciences
  • Sign on to:
    • My Media
    • Receive email
      updates
    • Edit Account details

Citation link: http://nbn-resolving.de/urn:nbn:de:gbv:46-00106491-18
00106491-1.pdf
OpenAccess
 
copyright

Effect of stress concentrations on the fatigue behaviour of structural adhesives


File Description SizeFormat
00106491-1.pdf23.45 MBAdobe PDFView/Open
Other Titles: Einfluss von Spannungskonzentrationen auf das Ermündungsverhalten von Strukturklebstoffen
Authors: Carrillo Beber, Vinicius  
Supervisor: Mayer, Bernd
1. Expert: Mayer, Bernd
2. Expert: da Silva, Lucas 
Abstract: 
Aim of the present research is to investigate the effect of stress concentrations on the fatigue behaviour of structural adhesives using numerical and experimental approaches with focus on the prediction of fatigue lifetime of notched specimens. A model was proposed to explain the behaviour of SN curves of notched specimens in which the slope is controlled by the size of the highly stressed region and the stress concentration factor translates the position of the curve. The SN curves for crack initiation lifetime of both adhesives have indicated that most of the fatigue lifetime was spent on the crack initiation phase. A method for lifetime prediction based on the stress-life approach and the Theory of Critical Distances to account for the effects of stress concentrations on the fatigue lifetime was proposed. The critical distance length was obtained through a calibration. The effectiveness of the proposed method in predicting the fatigue lifetime of notched specimens was evidenced by the good accuracy obtained with regards to experimental results (relative error less than 12%) for different notched specimens and different structural adhesives.
Keywords: Structural adhesives, Toughened epoxy, Fatigue behaviour, Lifetime prediction, Stress-life approach, Damage mechanics, Stress concentration, Notch
Issue Date: 9-Mar-2018
Type: Dissertation
URN: urn:nbn:de:gbv:46-00106491-18
Institution: Universität Bremen 
Faculty: FB4 Produktionstechnik 
Appears in Collections:Dissertationen

  

Page view(s)

71
checked on Jan 26, 2021

Download(s)

26
checked on Jan 26, 2021

Google ScholarTM

Check


Items in Media are protected by copyright, with all rights reserved, unless otherwise indicated.

Legal notice -Feedback -Data privacy
Media - Extension maintained and optimized by Logo 4SCIENCE