| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Furtado, Carolina
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (24/24 displayed)
- 2023A design methodology of composite scarf repairs using artificial intelligencecitations
- 2022MODE I CRACK PATH TRANSITIONS IN UNIDIRECTIONAL CARBON FIBRE COMPOSITES ANALYSED USING IN SITU 3D COMPUTED TOMOGRAPHY AND THE EXTENDED FINITE ELEMENT METHOD
- 2022In Situ Synchrotron X-ray Microtomography of Progressive Damage in Canted Notched Cross-Ply Composites with Interlaminar Nanoreinforcementcitations
- 2022Evaluation of digital volume correlation (DVC) applicability in silicon dioxide (SiO2) particle-doped carbon fibre reinforced polymers using in situ synchrotron radiation computed tomography (SRCT)
- 2021Modelling damage in multidirectional laminates subjected to multi-axial loadingcitations
- 2021A methodology to generate design allowables of composite laminates using machine learningcitations
- 2021A methodology to generate design allowables of composite laminates using machine learningcitations
- 2021Modelling damage in multidirectional laminates subjected to multi-axial loading:ply thickness effects and model assessmentcitations
- 2021In situ synchrotron computed tomography study of nanoscale interlaminar reinforcement and thin-ply effects on damage progression in composite laminatescitations
- 2020Is there a ply thickness effect on the mode I intralaminar fracture toughness of composite laminates?citations
- 2020Thin-ply polymer composite materials: a reviewcitations
- 2020Interlaminar to intralaminar mode I and II crack bifurcation due to aligned carbon nanotube reinforcement of aerospace-grade advanced compositescitations
- 2019Static and fatigue interlaminar shear reinforcement in aligned carbon nanotube-reinforced hierarchical advanced compositescitations
- 2019Simulation of failure in laminated polymer composites: building-block validationcitations
- 2019Damage micro-mechanisms in notched hierarchical nanoengineered thin-ply composite laminates studied by in situ synchrotron x-ray microtomographycitations
- 2019Virtual calculation of the B-value allowables of notched composite laminatescitations
- 2019A micro-mechanics perspective to the invariant-based approach to stiffnesscitations
- 2018Synergetic effects of thin plies and aligned carbon nanotube interlaminar reinforcement in composite laminatescitations
- 2017Prediction of size effects in open-hole laminates using only the Young's modulus, the strength, and the R-curve of the 0 degrees plycitations
- 2017Interlaminar reinforcement of carbon fiber composites using aligned carbon nanotubes
- 2017Damage modelling of thin-ply nano-reinforced composite laminates
- 2017Synergetic effects of thin ply and nanostitching studied by synchrotron radiation computed tomography
- 2016Selective ply-level hybridisation for improved notched response of composite laminatescitations
- 2016Selective ply-level hybridisation for improved notched response
Places of action
| Organizations | Location | People |
|---|
article
Interlaminar to intralaminar mode I and II crack bifurcation due to aligned carbon nanotube reinforcement of aerospace-grade advanced composites
Abstract
Aerospace-grade unidirectional carbon microfiber reinforced epoxy prepreg composite laminates were reinforced in the relatively weak interlaminar regions with high densities (>10 billion nanofibers per cm(2)) of uniformlydistributed vertically aligned carbon nanotubes (A-CNTs), creating a hierarchical architecture termed "nano stitch". Such nanostitched laminates have been shown to increase laminate in-plane and interlaminar shear strengths. Here, the Mode I and Mode II fracture behavior and associated toughening mechanisms are investigated experimentally by performing double cantilever beam and end-notched flexure tests, respectively, of unidirectional 0 degrees laminates following the ASTM Standards. Investigation of the crack surfaces via microscopy and micro-computed tomography (CT) show that in both Mode I and II, the interlaminar crack bifurcates into the intralaminar region from the interlaminar precrack, and then propagates within the intralaminar region parallel to the nanostitched interlaminar region as an "intralaminar delamination" in steady state. This before unobserved phenomenon is attributed to the A-CNTs adding interlaminar toughness to a level that causes the interlaminar crack to bifurcate into the less tough intralaminar region. Microscopy and mu CT analyses reveal that the A-CNTs do not increase the interlaminar thickness, and drive the crack into the intralaminar region within 1-2 nun of crack initiation in both Mode I and II, with the distance of the "intralaminar delamination- crack from the interlaminar region (at the laminate centerline) being greater in Mode II than in Mode I ((similar to)30 mu m vs. (similar to)15 pm, respectively). Finite element simulation of the crack bifurcation in Mode I predicts a minimum of 10% increase in interlaminar toughness due to the A-CNTs to propagate the crack in the intralaminar region in steady state, as observed experimentally. This unique crack behavior in advanced composites provides new insights into the magnitude and effects of reinforcement induced by A-CNTs that influence the macroscopic fracture and failure behavior of laminates, and suggests new opportunities for toughening laminates.