Experimental and numerical study on stiffness and damage of glass/epoxy biaxial weft-knitted reinforced composites
| Autor: | Hossein Hasani, Reza Jafari Nedoushan, Tohid Dastan, Navid Shekarchizadeh |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymers and Plastics Mechanical Engineering Glass epoxy Stiffness Failure mechanism 02 engineering and technology 021001 nanoscience & nanotechnology 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Ultimate tensile strength Materials Chemistry Ceramics and Composites medicine Composite material medicine.symptom 0210 nano-technology |
| Zdroj: | Journal of Reinforced Plastics and Composites. 40:70-83 |
| ISSN: | 1530-7964 0731-6844 |
| DOI: | 10.1177/0731684420938446 |
| Popis: | This paper deals with investigating the tensile characteristics of biaxial weft-knitted reinforced composites in terms of stiffness, strength and failure mechanism. The biaxial weft-knitted fabric was produced on an electronic flat knitting machine by E-glass yarns and then was impregnated with epoxy resin. Using an accurate geometrical model, the composite unit cell was designed in Abaqus software’s environment. Tensile tests were simulated in different directions on the created unit cell and the stiffness was calculated. By applying the proper failure theories, the composite strength was predicted and then critical regions of the unit cell were determined. In the next step, a micromechanical approach was also applied to estimate the same tensile features. Failure theories were also applied to predict the strength and most susceptible areas for failure phenomenon in the composite unit cell. The tensile properties of the produced composites were measured and compared with outputs of the finite element and micromechanical approaches. The results showed that the meso-scale finite element analysis approach can well predict the composite strength. In contrast, the meso-scale analytical equation model was not able to predict it acceptably because this model ignores the strain concentration. Both meso-scale finite element analysis and meso-scale analytical equation approaches predicted the similar locations for the composite failure in wale and course directions. |
| Databáze: | OpenAIRE |
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