Comparing crack density and dissipated energy as measures for off-axis damage in composite laminates

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

Abstract

To investigate off-axis cracks in composite laminates and their effect on stiffness and hysteretic energy dissipation, fatigue tests were instrumented with automated crack detection to test damage onset and progression. It was found that the onset of stiffness loss correlates well with the onset of matrix cracks, but not with the dissipated energy. To study the transition between experimentally observed damage modes occurring at the micro-scale, the experimentally obtained dissipated energy was compared with Carraro’s model, which predicts this transition based on local stresses. The results show a correlation between the absolute level of dissipated energy and the micro-damage modes.

Details

OriginalspracheEnglisch
Aufsatznummer107486
Seitenumfang10
FachzeitschriftInternational Journal of Fatigue
Jahrgang169.2023
AusgabenummerApril
Frühes Online-Datum23 Dez. 2022
DOIs
StatusVeröffentlicht - Apr. 2023