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| Finite Element Simulations of Damage Behaviors of PVDF/POSS Nanocomposites under Uniaxial Tensile Loads |
| Received:September 07, 2015 Revised:February 15, 2016 |
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| DOI：10.7643/issn.1672-9242.2016.01.015 |
| KeyWord:uniaxial tensile damage PVDF/POSS nanocomposites cohesive elements finite element simulation |
| Author | Institution |
| ZHAO Lian-hong |
Structure Corrosion Protection and Control of Aviation Science and Technology Key Laboratory，China Special Vehicle Reach Institute，Jingmen ，China |
| LIU Cheng-chen |
Structure Corrosion Protection and Control of Aviation Science and Technology Key Laboratory，China Special Vehicle Reach Institute，Jingmen ，China |
| LUO Xian-bin |
Structure Corrosion Protection and Control of Aviation Science and Technology Key Laboratory，China Special Vehicle Reach Institute，Jingmen ，China |
| WANG Hao-wei |
Structure Corrosion Protection and Control of Aviation Science and Technology Key Laboratory，China Special Vehicle Reach Institute，Jingmen ，China |
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| Abstract: |
| Objective To study the damage behaviors of PVDF and its fluorinated POSS nanocomposites under uniaxial tensile loads. Methods The particle-mixed finite element models of neat PVDF and three kinds of PVDF/ POSS nanocomposites with different POSS contents were firstly built according to the experimental results and the homogenization method in the mesoscopic mechanics. Then the damage behaviors were simulated after inserting the destructible cohesive elements into the solid elements. Results The simulated stress-strain relationships were in good agreement with the experimental results, which proved that the simulations in this article were reliable. The starting time of the damage revealed that at the initial stage the POSS was able to restrain the damage and the effect became obvious when the POSS content increased. And the final damage areas and the damage speed showed that the POSS would restrain the damage when its content was below 5%. In this case, the restraining effect was even stronger when the POSS content was increasing. However, the addition of POSS would accelerate the damage speed when the POSS content reached to 8% . Conclusion Doped POSS influences the damage of PVDF, the doping amount has the inhibition/ promotion effect on damage and failure of PVDF. These results are very helpful to understand the variation rules of the mechanical properties observed in the experiments. |
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