Experimental study of crack diversion, bridging mechanisms and enhanced delamination strength by dispersed carbon nanotubes in glass fibers composite laminates
Due to low toughness and strain-to-fracture, glass fibers (GFs) based composites suffer greatly from edge delamination and are therefore barely applied in automotive and aerospace technology. The self-similar crack propagation (SSCP), which occurs in metals and alloys, also plays a crucial role in c...
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Elsevier
2025-10-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127525010147 |
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| author | Hsin-Jung Tsai Yu-Sheng Lin Ching-Hao Liu Wen-Kuang Hsu |
| author_facet | Hsin-Jung Tsai Yu-Sheng Lin Ching-Hao Liu Wen-Kuang Hsu |
| author_sort | Hsin-Jung Tsai |
| collection | DOAJ |
| description | Due to low toughness and strain-to-fracture, glass fibers (GFs) based composites suffer greatly from edge delamination and are therefore barely applied in automotive and aerospace technology. The self-similar crack propagation (SSCP), which occurs in metals and alloys, also plays a crucial role in controlling delamination strength and toughness of GFs composites. Carbon nanotubes (CNTs) are one-dimensional conductors made of rounded graphite sheets and can be incorporated into polymers to create a new type of composites with electrical conductivity and mechanical stiffness much greater at a similar filling fraction compared with carbon black and graphene systems. In this work, multi-walled CNTs are used as secondary reinforcements and are dispersed at inter-regions of GFs/epoxy composite laminates. Microscopic analyses indicate that aligned GFs provide the primary reinforcement and micro-cracks around fibers are bridged and diverted by CNT stick–slip mechanism, namely, the SSCP retardation by CNTs. Mechanical measurements reveal improvements by 75% in bending stress, 46% in bending modulus, 75.24% fracture strain and 186.36% in toughness (delamination strength). |
| format | Article |
| id | doaj-art-d115189fc88443b791341d8d98e4428b |
| institution | Kabale University |
| issn | 0264-1275 |
| language | English |
| publishDate | 2025-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj-art-d115189fc88443b791341d8d98e4428b2025-08-20T04:03:22ZengElsevierMaterials & Design0264-12752025-10-0125811459410.1016/j.matdes.2025.114594Experimental study of crack diversion, bridging mechanisms and enhanced delamination strength by dispersed carbon nanotubes in glass fibers composite laminatesHsin-Jung Tsai0Yu-Sheng Lin1Ching-Hao Liu2Wen-Kuang Hsu3Department of Materials Science and Engineering, National Tsing-Hua University, Hsinchu City 300044, TaiwanDepartment of Materials Science and Engineering, National Tsing-Hua University, Hsinchu City 300044, TaiwanDepartment of Materials Science and Engineering, National Tsing-Hua University, Hsinchu City 300044, TaiwanCorresponding author.; Department of Materials Science and Engineering, National Tsing-Hua University, Hsinchu City 300044, TaiwanDue to low toughness and strain-to-fracture, glass fibers (GFs) based composites suffer greatly from edge delamination and are therefore barely applied in automotive and aerospace technology. The self-similar crack propagation (SSCP), which occurs in metals and alloys, also plays a crucial role in controlling delamination strength and toughness of GFs composites. Carbon nanotubes (CNTs) are one-dimensional conductors made of rounded graphite sheets and can be incorporated into polymers to create a new type of composites with electrical conductivity and mechanical stiffness much greater at a similar filling fraction compared with carbon black and graphene systems. In this work, multi-walled CNTs are used as secondary reinforcements and are dispersed at inter-regions of GFs/epoxy composite laminates. Microscopic analyses indicate that aligned GFs provide the primary reinforcement and micro-cracks around fibers are bridged and diverted by CNT stick–slip mechanism, namely, the SSCP retardation by CNTs. Mechanical measurements reveal improvements by 75% in bending stress, 46% in bending modulus, 75.24% fracture strain and 186.36% in toughness (delamination strength).http://www.sciencedirect.com/science/article/pii/S0264127525010147Carbon nanotubesStress-Strain curvesToughnessDelamination |
| spellingShingle | Hsin-Jung Tsai Yu-Sheng Lin Ching-Hao Liu Wen-Kuang Hsu Experimental study of crack diversion, bridging mechanisms and enhanced delamination strength by dispersed carbon nanotubes in glass fibers composite laminates Materials & Design Carbon nanotubes Stress-Strain curves Toughness Delamination |
| title | Experimental study of crack diversion, bridging mechanisms and enhanced delamination strength by dispersed carbon nanotubes in glass fibers composite laminates |
| title_full | Experimental study of crack diversion, bridging mechanisms and enhanced delamination strength by dispersed carbon nanotubes in glass fibers composite laminates |
| title_fullStr | Experimental study of crack diversion, bridging mechanisms and enhanced delamination strength by dispersed carbon nanotubes in glass fibers composite laminates |
| title_full_unstemmed | Experimental study of crack diversion, bridging mechanisms and enhanced delamination strength by dispersed carbon nanotubes in glass fibers composite laminates |
| title_short | Experimental study of crack diversion, bridging mechanisms and enhanced delamination strength by dispersed carbon nanotubes in glass fibers composite laminates |
| title_sort | experimental study of crack diversion bridging mechanisms and enhanced delamination strength by dispersed carbon nanotubes in glass fibers composite laminates |
| topic | Carbon nanotubes Stress-Strain curves Toughness Delamination |
| url | http://www.sciencedirect.com/science/article/pii/S0264127525010147 |
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