A linear finite element based unit-cell model was developed to predict elastic and strength properties of structurally stitched non-crimp carbon fiber fabric reinforced polymer matrix laminates. The elastic constants are obtained by applying and evaluating unit load cases. The maximum stress criterion is applied to predict fiber failure while Puck's action plane criterion for 3D stress states is used to estimate inter-fiber failure. Post-failure behavior based on partial stiffness degradation in a continuum mechanics approach is modeled by using a modified Chiu model. Three-dimensional stiffness and in-plane strength properties of structurally stitched laminates are numerically predicted by means of the unit-cell model and compared with experimental data.
Finite element based unit-cell prediction of stiffness and strenght properties of structurally stitched NCF CFRP
Finite-Elemente-basierte Vorhersage der Steifigkeits- und Festigkeitseigenschaften strukturell gehefteter NCF-CFRP
2009
6 Seiten, 4 Bilder, 8 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
kohlenstofffaserverstärkter Kunststoff , Laminat , Polymermatrix-Verbundwerkstoff , Finite-Elemente-Berechnungsprogramm , Steifigkeit , Elastizitätskonstante , Kontinuumsmechanik , dreidimensionale Struktur , Zelleinheit , Theorie-Experiment-Vergleich , Raumfahrtindustrie , Heften , numerische Analyse , Spannungs-Dehnungs-Verhalten , Zugmodul , experimentelle Daten
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