In this study, a brittle epoxy resin has successfully been toughened by very small concentrations of SiC and diamond nanoparticles. The tensile stress-strain response (based on the ASTM tensile tests for polymers) and the fracture energy release rate, GIC, (based on the ASTM Single-Edge-Notched-Bending, SENB, tests for polymers) of neat and nano-reinforced epoxy were characterized over a range of nanoparticle concentrations. The maximum elevation of the fracture toughness, GIC, occurred at a very small particle concentration of about 0.2% by weight, for both diamond and SiC nanoparticles). This was also manifested as higher tensile failure stress and strain. The elevation of fracture toughness is most likely due to crack front trapping of the particles that promoted subsequent local plastic deformation. Scanning electron micrographs of the fracture surfaces for samples tested in tension and fracture showed the transition of epoxy behavior from brittle-to-ductile-to-brittle with increasing weight percentage of nanoparticles. At higher particle concentrations, flaky fracture surface was observed and the fracture toughness dropped, attaining values similar to the unreinforced polymer, which is attributed to agglomeration of the nanoparticles.
Skip Nav Destination
ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 28–October 1, 2010
Philadelphia, Pennsylvania, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-4416-8
PROCEEDINGS PAPER
Use of Nanoparticles for the Development of High-Performance Nanoresins
Vamshi M. Gudapati,
Vamshi M. Gudapati
University of Hawaii at Manoa, Honolulu, HI
Search for other works by this author on:
Mehrdad N. Ghasemi-Nejhad
Mehrdad N. Ghasemi-Nejhad
University of Hawaii at Manoa, Honolulu, HI
Search for other works by this author on:
Vamshi M. Gudapati
University of Hawaii at Manoa, Honolulu, HI
Mehrdad N. Ghasemi-Nejhad
University of Hawaii at Manoa, Honolulu, HI
Paper No:
SMASIS2010-3805, pp. 169-173; 5 pages
Published Online:
April 4, 2011
Citation
Gudapati, VM, & Ghasemi-Nejhad, MN. "Use of Nanoparticles for the Development of High-Performance Nanoresins." Proceedings of the ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2. Philadelphia, Pennsylvania, USA. September 28–October 1, 2010. pp. 169-173. ASME. https://doi.org/10.1115/SMASIS2010-3805
Download citation file:
6
Views
Related Proceedings Papers
Related Articles
A Review of In Situ Mechanical Characterization of Polymer Nanocomposites: Prospect and Challenges
Appl. Mech. Rev (September,2017)
The tensile strength of brittle diamond lattice structure with material dispersion
J. Appl. Mech (January,0001)
Microstructural Characterization of Ultrasonically Welded Aluminum
J. Eng. Mater. Technol (January,2005)
Related Chapters
Layer Arrangement Impact on the Electromechanical Performance of a Five-Layer Multifunctional Smart Sandwich Plate
Advanced Multifunctional Lightweight Aerostructures: Design, Development, and Implementation
Characterization and evaluation
Biocompatible Nanomaterials for Targeted and Controlled Delivery of Biomacromolecules
Introduction and Definitions
Handbook on Stiffness & Damping in Mechanical Design