TUHH Open Research
Help
  • Log In
    New user? Click here to register.Have you forgotten your password?
  • English
  • Deutsch
  • Communities & Collections
  • Publications
  • Research Data
  • People
  • Institutions
  • Projects
  • Statistics
  1. Home
  2. TUHH
  3. Publication References
  4. Influence of impact damage on the fatigue behaviour of large scale composites
 
Options

Influence of impact damage on the fatigue behaviour of large scale composites

Publikationstyp
Conference Paper
Date Issued
2015
Sprache
English
Author(s)
Fiedler, Bodo  orcid-logo
Kosmann, Nils  
Fritsch, Daniel  
Schulte, Karl  
Institut
Kunststoffe und Verbundwerkstoffe M-11  
TORE-URI
http://hdl.handle.net/11420/6497
Volume
2015-July
Citation
ICCM International Conferences on Composite Materials (2015-July): (2015)
Contribution to Conference
20th International Conference on Composite Materials, ICCM 2015  
Defects in composite structures like impact damages have a major influence on the fatigue behaviour. These defects may occur during lifetime of composite parts and lead to delaminations between adjacent layers with different fibre orientations and to matrix cracks within these layers. We investigated the relationship between impact damage and fatigue lifetime. Specimens made of a glass fibre non-crimp fabric (NCF) were produced by vacuum assisted resin transfer moulding (VARTM). Impact damage was introduced using a drop weight with a hemispherical head and a canon. Two types of specimens were used: coupons with dimensions of 250 mm x 30 mm and a stringer-panel with the dimensions of about 1000 mm x 1000 mm. The panel was tested in a hexapod test rig applying multiaxial loads. In comparison, the obtained results from the coupon tests can be transferred to larger scale composite structures. In coupon tests, it was purposed to characterise the damage development in fatigue of fibre reinforced polymers as a function of impact damage, lifetime and stress ratio as precise as possible. Therefore, the stiffness degradation during fatigue due to matrix cracks, delaminations, fibre failure and temperature development of the specimens was plotted vs. the number of load cycles. In interrupted fatigue tests at defined numbers of load cycles the influence of defects on the matrix crack development was determined and correlated with the stiffness degradation. Furthermore, thermoelastic stress analysis was performed during the interrupted tests in order to determine the stress concentrations in the area of the impact damage. The coupons were tested under fatigue loading using a stress ratio of R=-1 (tension-compression) and R=10 (compression-compression).
Subjects
Damage mechanisms
Defects
Glass fibre reinforced polymers
Multiaxial loading
DDC Class
600: Technik
More Funding Information
The authors are grateful to the German Research Foundation (DFG) for supporting this work as part of the project SCHU 926/16-2 within PAK267.
TUHH
Weiterführende Links
  • Contact
  • Send Feedback
  • Cookie settings
  • Privacy policy
  • Impress
DSpace Software

Built with DSpace-CRIS software - Extension maintained and optimized by 4Science
Design by effective webwork GmbH

  • Deutsche NationalbibliothekDeutsche Nationalbibliothek
  • ORCiD Member OrganizationORCiD Member Organization
  • DataCiteDataCite
  • Re3DataRe3Data
  • OpenDOAROpenDOAR
  • OpenAireOpenAire
  • BASE Bielefeld Academic Search EngineBASE Bielefeld Academic Search Engine
Feedback