47
that there is no linear region of elastic deformation for these samples above this
value.
As displayed in Figure 3.7, the composites respond almost identically to the
neat polymer with the exception of two particular frequency ranges: 1) 57-70 Hz for
the radial test, and 2) 75-95 Hz for the axial test; frequency range #1 indicates a
significant spike in damping for the radial test, while frequency range #2 shows a
relatively similar enhancement for the axial test. An explanation for this behavior is
that at these frequencies, the samples were in resonance in the direction of the CNT
alignment. When in resonance along the length of the CNTs, greater interfacial
friction is likely to occur, which could reasonably explain the notable enhancement
in damping for those particular frequencies.
0.8
+∙>
Q
δ
и
C
,w

0
O
20
40 60
Frequency(Hz)
80 100
Figure 3.7 - Tangent delta for a frequency sweep DMA test.
More intriguing information
1. MICROWORLDS BASED ON LINEAR EQUATION SYSTEMS: A NEW APPROACH TO COMPLEX PROBLEM SOLVING AND EXPERIMENTAL RESULTS2. TOWARDS THE ZERO ACCIDENT GOAL: ASSISTING THE FIRST OFFICER MONITOR AND CHALLENGE CAPTAIN ERRORS
3. Evolution of cognitive function via redeployment of brain areas
4. Evidence on the Determinants of Foreign Direct Investment: The Case of Three European Regions
5. Public-private sector pay differentials in a devolved Scotland
6. Migrant Business Networks and FDI
7. The name is absent
8. Three Policies to Improve Productivity Growth in Canada
9. The name is absent
10. What Lessons for Economic Development Can We Draw from the Champagne Fairs?