In situ synchrotron tomographic evaluation of the effect of toughening strategies on fatigue micromechanisms in carbon fibre reinforced polymers
Source abstract
Abstract
Abstract Micromechanisms of fatigue failure in double-notch cross-ply carbon/epoxy coupons have been investigated using synchrotron radiation computed tomography (SRCT). The fatigue behaviour of toughened and untoughened matrices has been compared, highlighting similarities and differences of damage modes in terms of fatigue initiation and propagation. Results show that damage does not propagate evenly for the toughened systems: the presence of resin rich regions constrains crack propagation, which is shown to suppress damage growth. In contrast, untoughened material is characterized by more uniform crack progression. The presence of toughening particles in the resin system favours complex local crack geometries, such as crack deflection and the formation of bridging ligaments along the crack wake due to particle debonding events. A distinctive aspect of fatigue loading is identified in the degradation of crack bridging ligaments associated with increasing number of cycles.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Mechanical Behavior of Composites · Epoxy Resin Curing Processes · Fiber-reinforced polymer composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (32)
Show source-provided references
1. Fibre reinforced composites in aircraft construction
2. Fatigue damage mechanics of composite materials. I: experimental measurement of damage and post-fatigue properties10.1016/0266-3538(92)90109-G ↗
3. Micromechanics of reinforcement and damage initiation in carbon fibre/epoxy composites under fatigue loading10.1016/S1359-835X(00)00053-1 ↗
4. Constituent and composite quasi-static and fatigue fracture experiments10.1016/j.compositesa.2004.07.007 ↗
5. Damage development in open-hole composite specimens in fatigue. Part 1: experimental investigation10.1016/j.compstruct.2013.05.033 ↗
6. Cycle-based analysis of damage and failure in advanced composite under fatigue 1. experimental observation of damage development within loading cycles10.1016/S0142-1123(02)00170-6 ↗
7. Fatigue damage mechanics of composite materials. II: a damage growth model10.1016/0266-3538(92)90110-O ↗
8. Damage development in open-hole composite specimens in fatigue. Part 2: numerical modelling10.1016/j.compstruct.2013.05.019 ↗
9. An introduction to composite materials
10. The influence of toughening-particles in CFRPs on low velocity impact resistance performance10.1016/j.compositesa.2013.11.014 ↗
11. Influence of particle size distribution on toughening mechanisms in rubber-modified epoxies10.1007/BF01184979 ↗
12. Fracture behavior of epoxy polymers modified with core–shell rubber particles10.1002/(SICI)1097-4628(19970919)65:12<2419::AID-APP14>3.0.CO;2-W ↗
13. Fatigue of rubber-modified epoxies: effect of particle size and volume fraction10.1007/BF00352793 ↗
14. Rubber-toughened epoxies: a critical review10.1080/15583720903048227 ↗
15. Toughening mechanisms in thermoplastic-modified epoxies: 1. Modification using poly (phenylene oxide)10.1016/0032-3861(93)90051-B ↗
16. Thermoplastic toughening of epoxy resins: a critical review10.1002/(SICI)1099-1581(199801)9:1<3::AID-PAT727>3.0.CO;2-I ↗
17. Thermoplastic-toughened epoxy polymers10.1007/BF00357349 ↗
18. Crack propagation in a glass particle-filled epoxy resin, Part 1 effect of particle volume fraction and size10.1007/BF02403234 ↗
19. Crack propagation in a glass particle-filled epoxy resin, Part 2 effect of particle-matrix adhesion10.1007/BF02403235 ↗
20. Effect of particle size, particle/matrix interface adhesion and particle loading on mechanical properties of particulate-polymer composites
21. Fracture toughness of CFRP with modified epoxy resin matrices10.1016/0266-3538(92)90099-O ↗
22. Mode II delamination and damage resistance of carbon/epoxy composite laminates interleaved with thermoplastic particles10.1177/0021998306063356 ↗
23. Three-dimensional assessment of low velocity impact damage in particle toughened composite laminates using micro-focus X-ray computed tomography and synchrotron radiation laminography10.1016/j.compositesa.2013.05.003 ↗
24. Observations of damage development from compression-after-impact experiments using ex situ micro-focus computed tomography10.1016/j.compscitech.2014.04.008 ↗
25. In situ fibre fracture measurement in carbon-epoxy laminates using high resolution computed tomography10.1016/j.compscitech.2011.06.004 ↗
26. Fatigue micromechanism characterisation in carbon fibre reinforced polymers using synchrotron radiation computed tomography10.1016/j.compscitech.2014.05.006 ↗
27. Hexcel HexPly M21. .
28. Hexcel HexPly 8552. .
29. 3501-6 Epoxy Matrix, Hexcel. .
30. Wright PM. Investigation of damage in laminated carbon fibre composites using high resolution computed tomography. Ph.D. Thesis; 2011. p. 41.
31. Developments in synchrotron X-ray computed tomography at the national synchrotron light source10.1117/12.363725 ↗
32. The fatigue damage mechanics of notched carbon fibre/PEEK laminates10.1016/0010-4361(92)90329-S ↗