Improvement of mode-Ⅱ interface mechanical properties of Al/GFRP composite laminates by VGCF
Research and development on a composite material named as Fiber-Metal Laminates (FML) for its airplane structural applications have been focused on in recent years. These materials laminate FRP (Fiber Reinforced Plastic) of susceptibility to out-of-plane loads and metal of high impact resistance tog...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2014-02-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/80/810/80_2014smm0021/_pdf/-char/en |
| _version_ | 1811225191405060096 |
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| author | Takeru AZUMA Huiming NING Tomonori WATANABE Ning HU |
| author_facet | Takeru AZUMA Huiming NING Tomonori WATANABE Ning HU |
| author_sort | Takeru AZUMA |
| collection | DOAJ |
| description | Research and development on a composite material named as Fiber-Metal Laminates (FML) for its airplane structural applications have been focused on in recent years. These materials laminate FRP (Fiber Reinforced Plastic) of susceptibility to out-of-plane loads and metal of high impact resistance together to mutually compensating the weaknesses of FRP and metals. To date, a typical one of FML is GLARE (Glass Laminate Aluminum Reinforced Epoxy) which laminates the aluminum alloy (Al) and the Glass-fiber reinforced plastic (GFRP) together. In this work, interlaminar mechanical properties, e.g., fracture toughness, of GLARE are improved by acid treatment to Al and adding Vapor Grown Carbon Fiber (VGCF) between Al and GFRP layers. The influence of VGCF addition and acid treatment on the mechanical properties of GLARE is examined by End Notched Flexure (ENF) tests. On the surface of an Al plate, the “line” induced during rolling manufacturing process appears clearly by acid treatment. Furthermore, VGCF addition amount is changed as 0, 10, 20 and 30 g/m2. From the results of ENF tests for Mode-Ⅱ properties, when 10g/m2 of VGCF are added between Al with acid treatment and GFRP layers in GLARE, critical load (PC) and critical strain energy release rate in Mode-Ⅱ(GⅡC) increase most significantly due to the fiber bridging effect, i.e., 118% and 345%, respectively. The present results also reveal that properly adding VGCF, e.g., 10g/m2, has an effect on deterrence of crack growth. However, GⅡC decreases when the VGCF loading is too high due to poor VGCF dispersion, e.g., 30 g/m2 here. Moreover, the anisotropy of interlaminar mechanical properties depending on the “line” and fiber directions appears more obviously by adding VGCF. |
| first_indexed | 2024-04-12T09:01:26Z |
| format | Article |
| id | doaj.art-697065389f2d4494b140dcff27d642ee |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-12T09:01:26Z |
| publishDate | 2014-02-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-697065389f2d4494b140dcff27d642ee2022-12-22T03:39:13ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612014-02-0180810SMM0021SMM002110.1299/transjsme.2014smm0021transjsmeImprovement of mode-Ⅱ interface mechanical properties of Al/GFRP composite laminates by VGCFTakeru AZUMA0Huiming NING1Tomonori WATANABENing HUGraduate School of Engineering, Chiba UniversityGraduate School of Engineering, Chiba UniversityResearch and development on a composite material named as Fiber-Metal Laminates (FML) for its airplane structural applications have been focused on in recent years. These materials laminate FRP (Fiber Reinforced Plastic) of susceptibility to out-of-plane loads and metal of high impact resistance together to mutually compensating the weaknesses of FRP and metals. To date, a typical one of FML is GLARE (Glass Laminate Aluminum Reinforced Epoxy) which laminates the aluminum alloy (Al) and the Glass-fiber reinforced plastic (GFRP) together. In this work, interlaminar mechanical properties, e.g., fracture toughness, of GLARE are improved by acid treatment to Al and adding Vapor Grown Carbon Fiber (VGCF) between Al and GFRP layers. The influence of VGCF addition and acid treatment on the mechanical properties of GLARE is examined by End Notched Flexure (ENF) tests. On the surface of an Al plate, the “line” induced during rolling manufacturing process appears clearly by acid treatment. Furthermore, VGCF addition amount is changed as 0, 10, 20 and 30 g/m2. From the results of ENF tests for Mode-Ⅱ properties, when 10g/m2 of VGCF are added between Al with acid treatment and GFRP layers in GLARE, critical load (PC) and critical strain energy release rate in Mode-Ⅱ(GⅡC) increase most significantly due to the fiber bridging effect, i.e., 118% and 345%, respectively. The present results also reveal that properly adding VGCF, e.g., 10g/m2, has an effect on deterrence of crack growth. However, GⅡC decreases when the VGCF loading is too high due to poor VGCF dispersion, e.g., 30 g/m2 here. Moreover, the anisotropy of interlaminar mechanical properties depending on the “line” and fiber directions appears more obviously by adding VGCF.https://www.jstage.jst.go.jp/article/transjsme/80/810/80_2014smm0021/_pdf/-char/englarevgcfanisotropycomposite materialinterfacedelaminationfracture toughness |
| spellingShingle | Takeru AZUMA Huiming NING Tomonori WATANABE Ning HU Improvement of mode-Ⅱ interface mechanical properties of Al/GFRP composite laminates by VGCF Nihon Kikai Gakkai ronbunshu glare vgcf anisotropy composite material interface delamination fracture toughness |
| title | Improvement of mode-Ⅱ interface mechanical properties of Al/GFRP composite laminates by VGCF |
| title_full | Improvement of mode-Ⅱ interface mechanical properties of Al/GFRP composite laminates by VGCF |
| title_fullStr | Improvement of mode-Ⅱ interface mechanical properties of Al/GFRP composite laminates by VGCF |
| title_full_unstemmed | Improvement of mode-Ⅱ interface mechanical properties of Al/GFRP composite laminates by VGCF |
| title_short | Improvement of mode-Ⅱ interface mechanical properties of Al/GFRP composite laminates by VGCF |
| title_sort | improvement of mode ii interface mechanical properties of al gfrp composite laminates by vgcf |
| topic | glare vgcf anisotropy composite material interface delamination fracture toughness |
| url | https://www.jstage.jst.go.jp/article/transjsme/80/810/80_2014smm0021/_pdf/-char/en |
| work_keys_str_mv | AT takeruazuma improvementofmodeiiinterfacemechanicalpropertiesofalgfrpcompositelaminatesbyvgcf AT huimingning improvementofmodeiiinterfacemechanicalpropertiesofalgfrpcompositelaminatesbyvgcf AT tomonoriwatanabe improvementofmodeiiinterfacemechanicalpropertiesofalgfrpcompositelaminatesbyvgcf AT ninghu improvementofmodeiiinterfacemechanicalpropertiesofalgfrpcompositelaminatesbyvgcf |