MyJournals Home  

RSS FeedsMaterials, Vol. 12, Pages 1153: Influence of Reversed Fatigue Loading on Damage Evolution of Cross-Ply Carbon Fibre Composites (Materials)

 
 

9 april 2019 20:00:28

 
Materials, Vol. 12, Pages 1153: Influence of Reversed Fatigue Loading on Damage Evolution of Cross-Ply Carbon Fibre Composites (Materials)
 


Microcrack formation and delamination growth are the main damage mechanisms in thefatigue of composites. They lead to significant stiffness loss, introduce stress concentrations andcan be the origin of subsequent damage events like buckling or fibre breakage, especially in case ofshear and compression stresses during load reversal. Fatigue experiments of carbon fibre reinforcedlaminates were conducted at several stress ratios and analysed in terms of crack and delaminationgrowth. These investigations were accompanied by microscopic imaging, digital image correlationand finite element modelling to take into account the effects of residual stresses and crack closure.It was found that residual stresses significantly change the local stress ratio in off-axis layers andlead to residual crack opening of inter fibre cracks. These cracks remain open and close under highcompression loadings only. Furthermore, crack formation under pulsating compression loadingturned out to be driven by residual stresses leading to perpendicular cracks as observed underpure tension loading. The experimental findings further confirm the severe detrimental effect oftension-compression loading on crack formation and delamination growth compared to pulsatingtension-tension or compression-compression loads.


 
69 viewsCategory: Chemistry, Physics
 
Materials, Vol. 12, Pages 1154: X-ray Determination of Compressive Residual Stresses in Spring Steel Generated by High-Speed Water Quenching (Materials)
Sensors, Vol. 19, Pages 1696: Intelligent Positioning for a Commercial Mobile Platform in Seamless Indoor/Outdoor Scenes based on Multi-sensor Fusion (Sensors)
 
 
blog comments powered by Disqus


MyJournals.org
The latest issues of all your favorite science journals on one page

Username:
Password:

Register | Retrieve

Search:

Physics


Copyright © 2008 - 2024 Indigonet Services B.V.. Contact: Tim Hulsen. Read here our privacy notice.
Other websites of Indigonet Services B.V.: Nieuws Vacatures News Tweets Nachrichten