Experimental studies on the punch shear characterization of glass/epoxy/CNTs laminate nanocomposites
| Autor: | Mohammad Hossein Pol, Mohammad Sadeghi |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Nanocomposite
Materials science Diglycidyl ether Polymers and Plastics Glass fiber 02 engineering and technology General Chemistry Epoxy Carbon nanotube Penetration (firestop) 021001 nanoscience & nanotechnology law.invention Shear (sheet metal) chemistry.chemical_compound 020303 mechanical engineering & transports 0203 mechanical engineering chemistry law visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Plain weave Composite material 0210 nano-technology |
| Zdroj: | Polymer Composites. 39:E2096-E2105 |
| ISSN: | 0272-8397 |
| DOI: | 10.1002/pc.24468 |
| Popis: | The effects of specimen diameter to punch diameter (span ratio) and loading velocity are experimentally studied on quasi-static punch shear (QS-PS) properties of laminate nanocomposites. Nanocomposites specimen in this work is composed of 12 layers of plain weave glass fibers with areal density of 200 g/m2 which are made by hand lay-up method under pressure. Resin is composed of a two-component epoxy; diglycidyl ether of bisphenol A (Epon 828) as the base and modified cycloaliphatic amine (Epikure F-205) as the curing agent. Multi-walled carbon nanotubes (MWCNTs) modified by hydroxide (COOH) are used with 0%, 0.1%, 0.5%, and 1% ratio in weight with respect to the matrix. Also, two span ratios (5 and 10) and two loading velocities (5 mm/min and 500 mm/min) are utilized. Test results show that with a half span ratio in neat samples, the total penetration energy is approximately constant but the contact force increases about 20%, displacement at peak load decreases about 57%, and target plate deformation is reduced until full penetration. With increase of loading velocity from 5 to 500 mm/min, total absorbed energy of neat samples is increased about 47%. The results show that carbon nanotubes reduce the strength of the composites in which their failure mechanism is shear type. POLYM. COMPOS., 2017. © 2017 Society of Plastics Engineers |
| Databáze: | OpenAIRE |
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