Influence of temperature and impact energy on low velocity impact damage severity in CFRP

Publikationstyp
Conference Paper
Date Issued
2018-06
Sprache
English
Author(s)
Körbelin, Johann  
Derra, Manuel  
Fiedler, Bodo  orcid-logo
Institut
Kunststoffe und Verbundwerkstoffe M-11  
TORE-URI
http://hdl.handle.net/11420/6098
Citation
ECCM 2018 - 18th European Conference on Composite Materials: (2018-06)
Contribution to Conference
ECCM 2018 - 18th European Conference on Composite Materials  
Scopus ID
2-s2.0-85084164507
The present study deals with the effect of temperature and impact energy on the damage in CFRP subjected to low velocity impact. Quasi-isotropic laminates were impacted with energies between 8 and 21 J at temperatures ranging between 20 and 80 ◦C. The resulting damage was assessed using ultrasonic C-scans, radiography and confocal microscopy. The residual strength was evaluated utilizing compressive tests at 20 ◦C. It was found that delamination size is decreasing with increasing temperature. However, severe fibre failure on the impacted side occurs at elevated temperatures. This increases the visual damage detectability on the impacted side drastically while decreasing it on the opposite side. Nevertheless, the residual compressive strength is mainly dependent on the delamination area. As a result, visual damage severity does not correlate with the residual compressive strength. Different impact energies can have the same effect on the residual strength, when impacted at different temperatures.
Subjects
Damage Tolerance
Delamination
Impact behaviour
Thermomechanical