Theoretical study of the effective modulus of a composite considering the orientation distribution of the fillers and the interfacial damage

Cited 5 time in webofscience Cited 0 time in scopus
  • Hit : 72
  • Download : 0
In the manufacturing process of a filler-reinforced composite, the fillers are partially aligned due to the shear flow in the drawing stage. Besides, various imperfections form at the interface between the matrix and the fillers, leading to debonding and slip under mechanical loading. There have been numerous micromechanics studies to predict effective moduli of the composites in the presence of partial alignment of fillers and interface imperfections. Here, we present an improved theory that overcomes two limitations in the existing micromechanics based approaches. First, we find that the interface damage tensor for axisymmetric ellipsoidal inhomogeneity developed to model the interfacial damage leads to the prediction of infinite or negative effective moduli. We show that these anomalies can be eliminated if correctly derived damage tensor is used. Second, we reveal that the previous theory on the effective moduli with axisymmetric filler orientation distribution fails because longitudinal and transverse moduli predictions do not converge in the limit of random orientation distribution. With appropriate corrections, we derive analytic expressions for the orientation average of arbitrary transversely isotropic 4th order tensor under general axisymmetric orientation distribution. We apply the improved method to compute the effective moduli of a polymer-carbon nanotube composite with non-uniform filler orientation and interface damage.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2018-11
Language
English
Article Type
Article
Keywords

NANOTUBE REINFORCED COMPOSITES; FINITE-ELEMENT-METHOD; LITHIUM BATTERIES; CNT/POLYMER NANOCOMPOSITES; MECHANICAL-PROPERTIES; ELASTIC PROPERTIES; CARBON NANOTUBES; FIBER; BEHAVIOR; MICROMECHANICS

Citation

EUROPEAN JOURNAL OF MECHANICS A-SOLIDS, v.72, pp.79 - 87

ISSN
0997-7538
DOI
10.1016/j.euromechsol.2018.02.008
URI
http://hdl.handle.net/10203/246504
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 5 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0