Details

Autor(en) / Beteiligte

• Choi, Ghi Pyoung
• Sohn, Dongwoo
• Woo, Chang Hee
• Lee, Se-Hwan
• Ahn, Sang Hyun
• Cho, Young-Sam

Titel

Qualitative verification of the dispersion level in nano-composite and its application to YD-128/MWCNT composite to assess the wear characteristics with respect to the dispersion level

Ist Teil von

• Journal of Mechanical Science and Technology, 2013, 27(10), , pp.3131-3138

Ort / Verlag

Dordrecht: Springer Netherlands

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We analyzed the wear characteristics according to dispersion level of MWCNT in YD-128/MWCNT composite. Specimens for this study were fabricated using mechanical stirrer after blending of YD-128 and MWCNT. To change the dispersion level, the mixture of YD-128/MWCNT was stirred using mechanical stirrer during different times, such as, 15, 30, 60, and 120 minutes. Because the direct measuring of dispersion level is difficult in the case of solid composite, we suggest an indirect method for checking qualitatively the dispersion level as follows. Firstly, using the AEH (asymptotic expansion homogenization) in-house code, we analyzed numerically the mechanical stiffness of composite using RVEs (representative volume elements) which are modeled with different dispersion level. According to the numerical results of RVEs, we verified that the mechanical stiffness is higher as the dispersion degree is better. Then, through the experimental tensile test of the fabricated specimens using UTM, we obtained that the mechanical stiffness is higher as the stirring time is longer. Consequently, we could ensure that the dispersion degree of the fabricated specimens is better as the mechanical stirring time is longer. Finally, we assessed the wear test using abrading machine with fabricated specimens. We confirmed that the abrasion loss is decreased according to the increasing of dispersion degree in the case of YD-128/MWCNT composites.