Thesis
Experimental characterization of the deformation and fracture behavior of carbon nanofillers reinforced high density polyethylene under quasi-static and dynamic compressive and tensile loadings
Washington State University
Master of Science (MS), Washington State University
2014
Handle:
https://hdl.handle.net/2376/100504
Abstract
Due to their low density and high specific stiffness and strength, polymeric composites have been a major contender for developing light-weight, impact-resistant structures. For impact related applications, a good understanding of the material behavior under high strain rate loading is critical. In a previous work, the mechanical behavior of some HDPE (High Density Polyethylene) based polymer nanocomposites under quasi-static and dynamic compression loadings was experimentally characterized. The main objective of this study was to characterize and compare the mechanical behavior of polymer nanocomposites under tension and compression loadings, both quasi-static and dynamic. To achieve this objective, a test set-up capable of applying tensile loading in the strain rate range of 102~104 /s was developed first. Besides HDPE matrix material itself, the mechanical behavior of two different composites reinforced by CNFs (carbon nanofibers) and hybrid CNFs-GNPs (graphite nanoplatelets), respectively, was experimentally characterized. Microstructural analysis was also conducted to gain insights on the observed macroscopic behavior. It was observed all the materials exhibited appreciable rate sensitivity and the carbon nanofillers did enhance the strengths of the materials. It was also observed that the material strength was higher in tension than compression under quasi-static loadings, but lower under dynamic loadings. Possible reasons for this asymmetrical material behavior were also provided
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Details
- Title
- Experimental characterization of the deformation and fracture behavior of carbon nanofillers reinforced high density polyethylene under quasi-static and dynamic compressive and tensile loadings
- Creators
- Yuanyuan Liu
- Contributors
- Jow-Lian Ding (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Mechanical and Materials Engineering, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525284301842
- Language
- English
- Resource Type
- Thesis